2024 Gmc Denali 2024 Duramax Mpg. L5p can get as low as 6 mpg towing, or some have seen 13 mpg, all depends on weight, wind resistance, and. 470 hp @ 2,800 rpm;

View detailed gas mileage data for the 2024 gmc sierra 2500hd. A forum community dedicated to chevy and gmc duramax diesel owners and enthusiasts.