2025 Gmc Sierra Hd Specs. Explore the 2025 gmc sierra 2500 hd & 3500 hd denali luxury truck. Detailed specs and features for the 2023 gmc sierra 2500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more.

2025 gmc sierra hd interior: Series 2 and 3 designs are