2025 Gmc Sierra Denali Ultimate 2025 Hd Specs. View detailed specs, features and options for the 2025 gmc sierra 2500hd 4wd crew cab 172 denali ultimate at u.s. You are currently viewing gmc.com (united states).

The denali trim moves to second place in the sierra hd’s hierarchy for the 2025 model year with the introduction of the new denali ultimate trim, available for both the 2500. Detailed specs and features for the 2025 gmc sierra 2500hd diesel denali ultimate including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type,.