2024 Denali 2500. 2024 gmc sierra 2500hd and 3500hd pickup trucks equipped with the denali ultimate trim are the only truck in gmc’s lineup that come standard with the 6.6l l5p duramax diesel engine, producing 470. Detailed specs and features for the 2024 gmc sierra 2500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more.
Car rankings, scores, prices and specs. While the denali trim was toppled off its throne as the top trim package in gmc pickup trucks for 2024, it still offers significantly more features, luxury options,.