Vehicle Fitment Year Make Model Body & Trim Engine & Transmission 2004-2006 CHEVROLET SILVERADO 1500 Reference adaptation table V6 - 4.3L GAS ,V8 - 4.8L GAS,V8 - 5.3L FLEX/GAS,V8 - 6.0L GAS 2007 CHEVROLET SILVERADO 1500 CLASSIC LS ,LT V6 - 4.3L GAS ,V8 - 4.8L GAS,V8 - 5.3L FLEX/GAS,V8 - 6.0L GAS 2004-2006 GMC SIERRA 1500 Reference adaptation table V6 - 4.3L GAS ,V8 - 4.8L GAS,V8 - 5.3L FLEX/GAS,V8 - 6.0L GAS 2007 GMC SIERRA 1500 CLASSIC Denali,SLE,SL,SLT V6 - 4.3L GAS ,V8 - 4.8L GAS,V8 - 5.3L FLEX/GAS,V8 - 6.0L GAS FOR Crew Cab Does NOT fit models equipped with Flex Fuel (E85) Does NOT fit 1500 HD or 1500 HD Classic Models! Does NOT fit Cab & Chassis Models! (Came from factory without bed).
