Bosch OE Fine Wire Double Platinum Spark Plugs feature a platinum firing pin and ground electrode inlay that provide 3X longer service life compared to standard copper plugs Unique 360 degree, continuous laser welded fine wire platinum firing pin design delivers better corrosion resistance, ignitability, and performance Nickel-plated rolled threads provide exceptional resistance to corrosion and do not require anti-seize - making installation quick and easy Bosch OE Fine Wire Double Platinum spark plugs are pre-gapped at the factory and ready to install right out of the box - gap adjustment prior to installation not required Compatible with select vehicles including, but not limited to, the following (Note: engine affects fitment - verify specific fitment details with fit checker above): BUICK: 08-09 LaCrosse, 04-07 Rainier; CADILLAC: 04-07 CTS, 02-14 Escalade/EXT/ESV Compatible with (continued): CHEVROLET: 02-13 Avalanche, 98-02,10-15 Camaro, 11-17 Caprice, 09-12 Colorado, 97-13 Corvette, 03-14 Express 1500, 03-20 Express 2500/3500/4500, 06-09 Impala, 95-97,06-07 Monte Carlo, 00-13 Silverado 1500 Compatible with (continued): 00-13 Silverado 2500, 01-19 Silverado 2500 HD, 01-06,08-13,15-18 Silverado 3500, 07-19 Silverado 3500 HD, 14-17 SS, 03-06 SSR, 16-19 Suburban, 00-14 Suburban 1500, 00-13 Suburban 2500, 16-19 Suburban 3500 HD Compatible with (continued): CHEVROLET: 00-14 Tahoe, 06-09 Trailblazer, 97-09 W3500 Tiltmaster, 98-08 W4500 Tiltmaster; GMC: 09-12 Canyon, 05-09 Envoy, 03-06 Envoy XL, 04-05 Envoy XUV, 03-14 Savana 1500, 03-20 Savana 2500/3500, 09-20 Savana 4500 Compatible with (continued): GMC: 07-13 Sierra, 00-13 Sierra 1500, 01-03,05-06 Sierra 1500 HD, 00-04 Sierra 2500, 01-19 Sierra 2500 HD, 01-06 Sierra 3500, 07-19 Sierra 3500 HD, 95-08 W3500 Forward, 98-10 W4500 Forward, 00-14 Yukon/Yukon XL 1500 Compatible with (continued): GMC: 00-13 Yukon XL 2500; HUMMER: 03-09 H2, 08-10 H3, 09-10 H3T; ISUZU: 03-06 Ascender; PONTIAC: 00-02 Firebird, 08-09 G8, 91-96,05-08 Grand Prix, 04-06 GTO; SAAB: 05-09 9-7x