Gmc Ultimate Denali 2025. My gmc rewards > my gmc rewards discover all the ways to earn points. Detailed specs and features for the 2025 gmc sierra 2500hd diesel denali ultimate including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders,.
Think of the denali ultimate as a luxury car or suv that just happens to have a bed. The 2025 gmc sierra hd denali ultimate, refreshed for the 2025 model year, is gmc’s most premium, luxurious and technologically advanced truck yet.