Transmission:Transmission, 10-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 on 4WD models, (L87) 6.2L EcoTec3 V8 engine or (LM2) Duramax 3.0L Turbo-Diesel I6 engine. Most vehicles built on or after 6-7-2021 with a V8 engine and (MQB) 10-speed automatic transmi