Gmc Denali 2024 Diesel Mpg. Search by make for fuel efficient new and used cars and trucks. View detailed gas mileage data for the 2024 gmc sierra 3500hd.

We’ve tested a sierra 2500hd denali with the diesel engine, which returned 17 mpg on the highway. Research the 2024 gmc sierra 2500 at cars.com and find specs, pricing, mpg, safety data, photos, videos, reviews and local inventory.