2024 Gmc Denali 2500hd Diesel. Read the first test review of the 2024 gmc sierra 2500hd. Discover the 2024 gmc sierra 2500hd & 3500hd denali and the first ever denali ultimate, with 30,800 lbs max towing, premium comfort, and more.
2024 gmc sierra 2500hd and 3500hd pickup trucks equipped with the denali ultimate trim are the only truck in gmcโs lineup that come standard with the 6.6l l5p. We’ve only tested a sierra 2500hd denali with the diesel engine, which earned 17 mpg on the highway.
