2024 Gmc Hd Duramax Fuel Mileage. I was at my dealer for service to my 2022 zr2 this morning and they had a white 2024 2500 hd zr2 on the floor optioned out on the sticker at $87,905. Looking at a new 2024 at4 and just curious if the 10 speed transmission helps with mpg.

Use our handy tool to get estimated annual fuel costs based on your driving habits. Research the 2024 gmc sierra 2500 at cars.com and find specs, pricing, mpg, safety data, photos, videos, reviews and local inventory.