2025 Denali Ultimate Interior Specs. Detailed specs and features for the 2025 gmc sierra 2500hd diesel denali ultimate including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine. To ensure that one knows they are sitting in this exclusive trim of the sierra hd, it comes with the denali ultimate badge on the front seat backs and center console.
Available with a choice of engines, it comes in a singular. View detailed specs, features and options for the 2025 gmc sierra 1500 4wd crew cab 147 denali ultimate at u.s.