2024 Gmc Denali 2024 Dually 2024. Search from 4124 new gmc sierra 3500 cars for sale, including a 2024 gmc sierra 3500 at4,. Looking at a new 2024 at4 and just curious if the 10 speed transmission helps with mpg.

Looking at a new 2024 at4 and just curious if the 10 speed transmission helps with mpg. The front seatbacks and centre.