2025 Sierra Denali Hd Specs. The 2025 gmc sierra hd denali ultimate, refreshed for the 2025 model year, is gmc's most premium, luxurious and technologically advanced truck yet. Detailed specs and features for the 2025 gmc sierra 2500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more.

The 2025 gmc sierra 2500hd denali ultimate carries its 8,346 pounds of mass to 60 mph in a shockingly quick 6.5 seconds. This 2025 gmc sierra 2500 embodies class and sophistication with its refined white exterior.