2024 Gmc 3500hd Duramax Mpg. Estimates of gas mileage, greenhouse gas emissions, safety. Detailed specs and features for the 2024 gmc sierra 3500hd diesel denali ultimate including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine.
Choose either a gmc sierra 2500 hd or 3500 hd and learn more about the vehicle specs, trims, and features available. Use our handy tool to get estimated annual fuel costs based on your driving habits.