New 2025 Gmc 2500hd. View information about specs and features. Explore the 2025 gmc sierra 2500 hd & 3500 hd denali luxury truck.
Find specs and features for the 2025 gmc sierra 2500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, safety rating, drivetrain and more. Following last year’s enhancements, the sierra hd is more sophisticated than ever.