2024 Gmc 3500hd Duramax Diesel. Detailed specs and features for the 2024 gmc sierra 3500hd diesel denali ultimate including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders,. Looking at a new 2024 at4 and just curious if the 10 speed transmission helps with mpg.

How does the size affect performance? As we can see from these tables, the 2024 gmc sierra hd model with the highest towing capacity rating is the 3500 hd regular cab / long bed drw (dual rear wheel) with.