2025 Denali 2025 Hd. Detailed specs and features for the 2025 gmc sierra 2500hd diesel denali ultimate including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders,. 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.
The 2025 gmc sierra 2500hd denali ultimate carries its 8,346 pounds of mass to 60 mph in a shockingly quick 6.5 seconds. Denali ultimate is added, and it adds a new level of luxury over the standard denali.