6-speed automatic heavy-duty transmission

Standard equipment on Express Cargo, this heavy-duty 6-speed automatic transmission handles the power of the Vortec® or gaseous engine. Electronically controlled, it is equipped with overdrive, an internal transmission oil cooler, plus Tow/Haul mode to help you control heavy loads.

This transmission requires the Vortec 4.8L V8 SFI FlexFuel engine, Vortec 6.0L V8 SFI FlexFuel engine or gaseous 6.0L V8 SFI engine.