6-Speed Automatic (DISC) No longer available as standard equipment as of January 16, 2019.
8-Speed TorqueFlite Automatic (DFD)
8-Speed TorqueFlite Automatic (DFL)
8-Speed TorqueFlite Auto
6-Speed Automatic
Engine, 4.3L EcoTec3 V6 (285 hp [212 kW] @ 5300 rpm, 305 lb-ft of torque [413 Nm] @ 3900 rpm) (Requires (MYC) 6-speed automatic transmission.)
Transmission, 6-speed automatic, electronically controlled with overdrive and tow/haul mode. Includes Cruise Grade Braking and Powertrain Grade Braking (Included and only available with (LV3) 4.3L EcoTec3 V6 engine or (L82) 5.3L EcoTec3 V8 engine.)
Transmission, 8-speed automatic, electronically controlled with overdrive and tow/haul mode. Includes Cruise Grade Braking and Powertrain Grade Braking
Transmission, 8-speed automatic, electronically controlled with overdrive and tow/haul mode. Includes Cruise Grade Braking and Powertrain Grade Braking (Included and only available with (L84) 5.3L EcoTec3 V8 engine.)
Cooling, auxiliary external transmission oil cooler
Cooling, auxiliary external transmission oil cooler (Not available with (LM2) Duramax 3.0L Turbo-Diesel I6 engine.)