2024 Denali Duramax 2024 Specs. Detailed specs and features for the 2024 gmc sierra 2500hd diesel denali ultimate including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders,. Other news, the 6.6 gasser gets the big 10 speed for 2024 and some new color and trim options.
Explore the 2025 gmc sierra 2500 hd & 3500 hd denali luxury truck. Duramax’s are easy on oil.