2024 Gmc Sierra At4x Mpg Review. The 2024 gmc sierra 2500 4wd crew cab at4x brings a delicious combination of comfort, style and brute force to market, for a price.  — 2024 gmc sierra ev denali edition 1 vehicle type:

 — with a 19 mpg city, 20 mpg highway, and 19 mpg combined epa fuel economy rating, meanwhile, the diesel isn’t quite as efficient as it is in other sierra forms. 2024 gmc sierra 1500 review.