Division: Ignition
Brand: Champion
Part Type: Spark Plug
Part Number: 4013
Packaging: Overstock Inventory in Manufacturer’s Packaging
Sales Description: 4013; Spark Plug Champion

Manufacture	Number
Toyota	13568-16030
Toyota	13568-19035
Champion	15
Lada	2108-1006040
Lada	2108-1006040-00
Bosch	242225570
NGK	4013
Denso	5325
NGK	6213
Torch	8005
Mopar	82300321
Torch	9003
Motorcraft	AGSF23C
Motorcraft	AGSF33C
Motorcraft	AGSF43C
Autolite	AP2544
Autolite	AP5143
Autolite	AP5144
Bosch	HR8LPX
Bosch	HR9LCX
Bosch	HR9LCY
Bosch	HR9LPX
ACDelco	R42LTSM
ACDelco	R43LTSE
ACDelco	R44LTSM
ACDelco	R44LTSM6
ACDelco	R44LTSMA
Champion Spark Plug	RS15LYC
NGK	TR4
DENSO Auto Parts	W14FP-U

Year	Make	Model	Engine	Notes
2003	FORD	E-150	V6-4.2L	Spark Plug
2003	FORD	E-150 CLUB WAGON	V6-4.2L	Spark Plug
02-98	FORD	E-150 ECONOLINE	V6-4.2L	Spark Plug
02-98	FORD	E-150 ECONOLINE CLUB WAGON	V6-4.2L	Spark Plug
2003	FORD	E-250	V6-4.2L	Spark Plug
02-98	FORD	E-250 ECONOLINE	V6-4.2L	Spark Plug
02-01	FORD	ESCORT	All	Spark Plug
1983	FORD	ESCORT	All	Spark Plug
90-88	FORD	ESCORT	All	Spark Plug
85-84	FORD	ESCORT	L4-1.6L	Spark Plug
87-85	FORD	ESCORT	L4-1.9L	Spark Plug
96-91	FORD	ESCORT	L4-1.9L	Spark Plug
00-97	FORD	ESCORT	L4-2.0L	Spark Plug
88-83	FORD	EXP	All	Spark Plug
03-98	FORD	F-150	V6-4.2L	Spark Plug
08-05	FORD	F-150	V6-4.2L	Spark Plug
2004	FORD	F-150 HERITAGE	V6-4.2L	Spark Plug
02-00	FORD	FOCUS	All	Spark Plug
04-03	FORD	FOCUS	L4-2.0L	Spark Plug
07-06	FORD	FREESTAR	V6-3.9L	Spark Plug
07-06	FORD	FREESTAR	V6-4.2L	Spark Plug
84-83	FORD	RANGER	L4-2.3L	Spark Plug
04-01	FORD	RANGER	V6-4.0L	Spark Plug
95-89	FORD	THUNDERBIRD	V6-3.8L	Spark Plug
07-01	MAZDA	B4000	All	Spark Plug
90-89	MERCURY	COUGAR	All	Spark Plug
1983	MERCURY	LN7	All	Spark Plug
1983	MERCURY	LYNX	All	Spark Plug
85-84	MERCURY	LYNX	L4-1.6L	Spark Plug
87-85	MERCURY	LYNX	L4-1.9L	Spark Plug
07-06	MERCURY	MONTEREY	All	Spark Plug
99-97	MERCURY	TRACER	All	Spark Plug
96-91	MERCURY	TRACER	L4-1.9L	Spark Plug

Year	Make	Model	Engine	Trim
All Years 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008	All Makes Chevrolet GMC	All Models Express 2500 Sierra 1500 Sierra 2500 HD Silverado 1500 Silverado 2500 Silverado 2500 HD Suburban 1500 Tahoe	All Engines 4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated 5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated 5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated 5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated 5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated 5.3L 5328CC 325Cu. In. V8 GAS OHV Naturally Aspirated 6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated 6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated 6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated 8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	All Trims Base Cab & Chassis 2-Door Base Cab & Chassis 3-Door Base Cab & Chassis 4-Door Base Crew Cab Pickup 4-Door Base Extended Cab Pickup 2-Door Base Extended Cab Pickup 3-Door Base Extended Cab Pickup 4-Door Base Extended Cargo Van 3-Door Base Extended Passenger Van 3-Door Base Sport Utility 4-Door Base Standard Cab Pickup 2-Door Base Standard Cargo Van 3-Door Base Standard Passenger Van 3-Door Classic LS Crew Cab Pickup 4-Door Classic LS Extended Cab Pickup 4-Door Classic LS Standard Cab Pickup 2-Door Classic WT Extended Cab Pickup 4-Door Classic WT Standard Cab Pickup 2-Door HT Standard Cab Pickup 2-Door LS Cab & Chassis 2-Door LS Cab & Chassis 3-Door LS Cab & Chassis 4-Door LS Crew Cab Pickup 4-Door LS Extended Cab Pickup 2-Door LS Extended Cab Pickup 3-Door LS Extended Cab Pickup 4-Door LS Sport Utility 4-Door LS Standard Cab Pickup 2-Door LT Cab & Chassis 2-Door LT Cab & Chassis 3-Door LT Cab & Chassis 4-Door LT Crew Cab Pickup 4-Door LT Extended Cab Pickup 2-Door LT Extended Cab Pickup 3-Door LT Extended Cab Pickup 4-Door LT Sport Utility 4-Door LT Standard Cab Pickup 2-Door LTZ Crew Cab Pickup 4-Door LTZ Extended Cab Pickup 4-Door LTZ Standard Cab Pickup 2-Door SL Cab & Chassis 2-Door SL Cab & Chassis 4-Door SL Crew Cab Pickup 4-Door SL Extended Cab Pickup 4-Door SL Standard Cab Pickup 2-Door SLE Cab & Chassis 2-Door SLE Cab & Chassis 4-Door SLE Crew Cab Pickup 4-Door SLE Extended Cab Pickup 4-Door SLE Standard Cab Pickup 2-Door SLT Crew Cab Pickup 4-Door SLT Extended Cab Pickup 4-Door WT Cab & Chassis 2-Door WT Cab & Chassis 4-Door WT Crew Cab Pickup 4-Door WT Extended Cab Pickup 4-Door WT Standard Cab Pickup 2-Door Z71 Extended Cab Pickup 4-Door Z71 Standard Cab Pickup 2-Door

Year	Make	Model	Engine	Trim	Notes
1999	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
1999	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
1999	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Classic LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Classic LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Classic LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Classic WT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Classic WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
1999	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
1999	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
1999	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2008	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
1999	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
1999	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2008	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2008	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	WT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	WT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	WT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Tahoe	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LS Sport Utility 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Tahoe	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	LT Sport Utility 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SL Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SL Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SL Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SL Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SLE Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2008	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SLE Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2008	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2008	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SLT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	SLT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 1500	4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2002	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2005	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2002	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2002	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2002	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	WT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2002	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Z71 Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Z71 Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2003	Chevrolet	Suburban 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LS Sport Utility 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2003	Chevrolet	Suburban 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LT Sport Utility 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2004	Chevrolet	Tahoe	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LS Sport Utility 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Tahoe	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	LT Sport Utility 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	HT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	SL Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	SL Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	SLE Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	SLT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	SLT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	SLT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	WT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 FLEX OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Express 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cargo Van 3-Door	Gap 0.040 in; Original Equipment Is Iridium; RWD
2005	Chevrolet	Express 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Passenger Van 3-Door	Gap 0.040 in; Original Equipment Is Iridium; RWD
2005	Chevrolet	Express 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cargo Van 3-Door	Gap 0.040 in; Original Equipment Is Iridium; RWD
2005	Chevrolet	Express 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Passenger Van 3-Door	Gap 0.040 in; Original Equipment Is Iridium; RWD
2000	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2000	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2005	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2000	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2000	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2000	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	WT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2002	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Z71 Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2004	Chevrolet	Silverado 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Z71 Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2000	Chevrolet	Silverado 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LT Cab & Chassis 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Suburban 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Sport Utility 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Suburban 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Sport Utility 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Suburban 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Sport Utility 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2001	Chevrolet	Suburban 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LT Sport Utility 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Suburban 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LT Sport Utility 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: Z
2004	Chevrolet	Tahoe	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LS Sport Utility 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Tahoe	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	LT Sport Utility 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	HT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SL Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SL Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SL Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SL Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SLE Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SLT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SLT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SLT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	SLT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	WT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	GMC	Sierra 1500	5.3L 323Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	Classic LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	Classic LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	Classic LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	Classic WT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	Classic WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	LT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	LTZ Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	LTZ Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	LTZ Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	WT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	WT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	GMC	Sierra 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	SLE Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	GMC	Sierra 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	GMC	Sierra 1500	5.3L 325Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	GMC	Sierra 1500	5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated	SLE Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2008	GMC	Sierra 1500	5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated	SLE Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: J
2006	GMC	Sierra 1500	5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2008	GMC	Sierra 1500	5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: J
2006	GMC	Sierra 1500	5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2008	GMC	Sierra 1500	5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: J
2008	GMC	Sierra 1500	5.3L 5328CC 325Cu. In. V8 GAS OHV Naturally Aspirated	SLE Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: J
2008	GMC	Sierra 1500	5.3L 5328CC 325Cu. In. V8 GAS OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: J
2008	GMC	Sierra 1500	5.3L 5328CC 325Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium; VIN: J
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated	Base Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated	Base Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated	LS Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated	LT Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 BI-FUEL OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Express 2500	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Extended Cargo Van 3-Door	Gap 0.040 in; Original Equipment Is Iridium; RWD
2005	Chevrolet	Express 2500	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Extended Passenger Van 3-Door	Gap 0.040 in; Original Equipment Is Iridium; RWD
2005	Chevrolet	Express 2500	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Standard Cargo Van 3-Door	Gap 0.040 in; Original Equipment Is Iridium; RWD
2005	Chevrolet	Express 2500	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Standard Passenger Van 3-Door	Gap 0.040 in; Original Equipment Is Iridium; RWD
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	LS Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	LS Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	LT Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	SLE Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	SLE Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	SLE Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	SLT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	SLT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	WT Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Express 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cargo Van 3-Door	Gap 0.040 in; Original Equipment Is Iridium; RWD
2005	Chevrolet	Express 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Passenger Van 3-Door	Gap 0.040 in; Original Equipment Is Iridium; RWD
2005	Chevrolet	Express 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cargo Van 3-Door	Gap 0.040 in; Original Equipment Is Iridium; RWD
2005	Chevrolet	Express 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Passenger Van 3-Door	Gap 0.040 in; Original Equipment Is Iridium; RWD
2004	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LTZ Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LTZ Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2007	Chevrolet	Silverado 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LTZ Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Cab & Chassis 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 3-Door	Gap 0.040 in; Original Equipment Is Iridium;
2000	Chevrolet	Silverado 2500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2002	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	LT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	WT Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	WT Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	WT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	WT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2008	GMC	Sierra 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	SLE Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2008	GMC	Sierra 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	GMC	Sierra 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2008	GMC	Sierra 1500	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	SLE Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	SLE Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	SLE Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	SLT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	SLT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	WT Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LS Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2001	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2005	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	LT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	WT Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	WT Cab & Chassis 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	WT Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	WT Cab & Chassis 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	WT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	WT Crew Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	WT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	WT Extended Cab Pickup 4-Door	Gap 0.040 in; Original Equipment Is Iridium;
2004	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2006	Chevrolet	Silverado 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.040 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 2-Door	Gap 0.060 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Cab & Chassis 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Crew Cab Pickup 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Extended Cab Pickup 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	Base Standard Cab Pickup 2-Door	Gap 0.060 in; Original Equipment Is Iridium;
2001	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SL Cab & Chassis 2-Door	Gap 0.060 in; Original Equipment Is Iridium;
2001	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SL Cab & Chassis 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2001	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SL Crew Cab Pickup 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2001	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SL Extended Cab Pickup 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2001	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SL Standard Cab Pickup 2-Door	Gap 0.060 in; Original Equipment Is Iridium;
2001	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLE Cab & Chassis 2-Door	Gap 0.060 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLE Cab & Chassis 2-Door	Gap 0.060 in; Original Equipment Is Iridium;
2001	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLE Cab & Chassis 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLE Cab & Chassis 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2001	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLE Crew Cab Pickup 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLE Crew Cab Pickup 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2001	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLE Extended Cab Pickup 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2001	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.060 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLE Standard Cab Pickup 2-Door	Gap 0.060 in; Original Equipment Is Iridium;
2001	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLT Crew Cab Pickup 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLT Crew Cab Pickup 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2001	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLT Extended Cab Pickup 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	SLT Extended Cab Pickup 4-Door	Gap 0.060 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	WT Cab & Chassis 2-Door	Gap 0.060 in; Original Equipment Is Iridium;
2003	GMC	Sierra 2500 HD	8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated	WT Standard Cab Pickup 2-Door	Gap 0.060 in; Original Equipment Is Iridium;