2024 Duramax Fuel Mileage Per Km. View detailed gas mileage data for the 2024 gmc sierra 2500hd. The 2024 silverado 2500 duramax diesel achieved a result of 18 mpg in our testing.
View detailed gas mileage data for the 2024 gmc sierra 2500hd. Improved styling, an upscale interior, and more powerful duramax engine make the.