2025 Gmc 2025 Duramax Specs. Detailed specs and features for the 2025 gmc sierra 2500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more. 2025 gmc sierra 1500 at4 in sterling metallic (a $495 color option) 2025 gmc sierra 1500 at4 specs.

The selection of powertrains is equally broad: Detailed specs and features for the 2025 gmc sierra 1500 including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more.