Chevrolet Radio Wiring Diagram - A brand of vehicle, Chevrolet or Chevy was produced by General Motors Company (GM). The car was named after Louis Chevrolet and was set up to sell a variety of mainstream vehicles to compete with. 1) Only for vehicles with a 3.6L gasoline engine and engine code CDVB. 2) Only for vehicles with a 2.0L diesel engine and engine code CKRA. 3) Only for vehicles with a. CHEVY AND GMC TRUCK MODEL YEAR DIFFERENCES (Including photos of various years) Updated 4-11-03. From 1967 until 1972, body styles were the same. In 1973, a new design was introduced..