Transmission, 6-speed automatic, heavy-duty, electronically controlled with overdrive and tow/haul mode. Includes Cruise Grade Braking and Powertrain Grade Braking (Requires (L96) Vortec 6.0L V8 SFI engine or (LC8) 6.0L V8 SFI Gaseous engine.)
Cooling, auxiliary external transmission oil cooler
TorqShift 6-Speed Automatic -inc: SelectShift, tow/haul mode, small plastic urea tank and exhaust brake (B20 capability)
6-Speed Automatic w/SelectShift -inc: tow/haul mode
5-Speed TorqShift Automatic w/OD -inc: tow/haul mode