Workhorse: FasTrack FT1801 04 - 05 6 L Engine, Workhorse: FasTrack FT1461 04 - 05 6 L Engine, Chevrolet: SSR 05 - 06 6 L Engine, GMC: Sierra 3500 Classic 07 - 07 6 L Engine, Chevrolet: Avalanche 07 - 08 6 L Engine, GMC: Sierra 2500 HD Classic 07 - 07 6 L Engine, Chevrolet: Silverado 3500 Classic 07 - 07 6 L Engine, Chevrolet: Silverado 2500 HD 01 - 08 6 L Engine, Chevrolet: Silverado 1500 HD 01 - 06 6 L Engine, Cadillac: Escalade EXT 02 - 06 6 L Engine, Cadillac: Escalade ESV 03 - 06 6 L Engine, Chevrolet: Impala 06 - 06 5.3 L Engine, Chevrolet: Express 2500 03 - 08 6 L Engine, Chevrolet: Silverado 2500 99 - 04 6 L Engine, GMC: Envoy XUV 04 - 05 5.3 L Engine, GMC: Yukon 00 - 06 5.3 L Engine, Chevrolet: Silverado 2500 06 - 06 4.8 L Engine, Chevrolet: Suburban 1500 00 - 06 5.3 L Engine, Workhorse: FasTrack FT1461 04 - 05 4.8 L Engine, GMC: Yukon 00 - 06 4.8 L Engine, Chevrolet: Avalanche 1500 02 - 06 5.3 L Engine, Chevrolet: Silverado 1500 99 - 06 5.3 L Engine, Chevrolet: Express 3500 03 - 06 4.8 L Engine, Chevrolet: Trailblazer EXT 03 - 06 5.3 L Engine, Chevrolet: Silverado 1500 99 - 06 4.8 L Engine, Workhorse: FasTrack FT1261 05 - 05 4.8 L Engine, Chevrolet: Express 2500 03 - 05 5.3 L Engine, GMC: Sierra 1500 01 - 08 6 L Engine, GMC: Yukon XL 1500 01 - 08 6 L Engine, GMC: Sierra 1500 99 - 06 5.3 L Engine, Chevrolet: Cargo Van 04 - 04 6 L Engine, GMC: Savana 3500 03 - 08 6 L Engine, Chevrolet: Express 3500 03 - 08 6 L Engine, GMC: Sierra 1500 HD 01 - 06 6 L Engine, Isuzu: Ascender 03 - 06 5.3 L Engine, Chevrolet: Trailblazer 06 - 06 5.3 L Engine, GMC: Yukon XL 2500 00 - 08 6 L Engine, Cadillac: Escalade 02 - 05 5.3 L Engine, Chevrolet: Silverado 3500 01 - 08 6 L Engine, GMC: Yukon XL 1500 00 - 06 5.3 L Engine, Chevrolet: Tahoe 08 - 08 6 L Engine, GMC: Savana 3500 03 - 06 4.8 L Engine, GMC: Savana 2500 03 - 05 5.3 L Engine, Chevrolet: Trailblazer 06 - 08 6 L Engine, GMC: Savana 1500 03 - 06 5.3 L Engine, Chevrolet: Express 3500 03 - 06 5.3 L Engine, Chevrolet: Tahoe 0