2024 Gmc Denali 2500hd Duramax. Detailed specs and features for the 2024 gmc sierra 2500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more. 2024 gmc sierra 2500hd and 3500hd pickup trucks equipped with the denali ultimate trim are the only truck in gmc’s lineup that come standard with the 6.6l l5p.
Looking at a new 2024 at4 and just curious if the 10 speed transmission helps with mpg. I did feel that the stock shocks were underdamped and allowed too much bouncing over bumps but i.