2025 Gmc Sierra 3500hd Towing Capacity. Gmc is unveiling the 2025 sierra heavy duty truck and the first ever 2025 sierra hd denali ultimate, redefining the power and capability of this dominating truck. Compare the maximum available gmc sierra hd towing capacity between the 2025 sierra.

Compare the maximum available gmc sierra hd towing capacity between the 2025 sierra. Detailed specs and features for the 2025 gmc sierra 3500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more.