2024 Gmc Denali Duramax Mpg. We've tested a sierra 2500hd denali with the diesel engine, which returned 17 mpg on the highway. Use our handy tool to get estimated annual fuel costs based on your driving habits.
A forum community dedicated to chevy and gmc duramax diesel owners and enthusiasts. Research the 2024 gmc sierra 1500 diesel with our expert reviews and ratings.