- Jan 2, 2023
- Reaction score
As I was reviewing my build with GM (2023 Yukon Denali XL with 3.0 L Duramax) vs my in laws build with GM (2023 Chevrolet Tahoe with 5.3 L V8), I realized that our 10 speed automatic transmission code was different. After doing some research I realized that the new 5.3 and 6.2 V8s got an updated 10 speed automatic transmission (Transmission Code MHS) that come with OTA update ability in 2022 but GM has decided to continue to use the 2021 version of the same transmission (Transmission Code MQC) in all the 3.0 L Duramax vehicles. I wonder why this is..? Anyone have anymore information on the topic?