Transmission, 6-speed automatic, heavy-duty, electronically controlled with overdrive and tow/haul mode and internal transmission oil cooler (Included with (L20) Vortec 4.8L SFI engine or (L96) Vortec 6.0L V8 SFI FlexFuel engine. Includes external engine oil cooler. Reference the Engine/Axle page for availability.)
Transmission oil cooler, external (Deleted when (LWN) 2.8L Duramax Turbo Diesel engine is ordered.)
Brake/transmission shift interlock for automatic transmissions
Transmission, 6-speed automatic, heavy-duty, electronically controlled with overdrive tow/haul mode and internal transmission oil cooler (Reference the Engine/Axle page for availability.)
Brake/transmission shift interlock, for automatic transmissions
9-Speed Automatic