Transmission Description: Transmission, 4-speed automatic, electronically controlled with overdrive and tow/haul mode (On Crew Cab models, requires (L20) Vortec 4.8L V8 SFI Flex-Fuel engine. Not available on C*10953 models.)
Transmission Description: Transmission, 6-speed automatic electronically controlled with overdrive and tow-haul mode, tap up/tap down shifting (1/2 ton models only.)