2024 Denali Ultimate 2024. The 2024 gmc sierra hd denali ultimate, refreshed for the 2024 model year, is gmc's most premium, luxurious and technologically advanced truck yet. The 2024 gmc sierra 1500 denali ultimate is the absolute top rung in the brand’s luxury truck hierarchy.
Detailed specs and features for the 2024 gmc sierra 2500hd diesel denali ultimate including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine. Think of the denali ultimate as a luxury car or suv that just happens to have a bed.