2025 Gmc Sierra Duramax Mpg

2025 Gmc Sierra Duramax Mpg. While the regular 4×4 sierra with the duramax diesel gets 24 mpg combined, the at4x is rated at 19 mpg combined. If your serious about a gas hd truck look at ford with the big block v8 in it, very impressive engine and its really good on gas, my buddy has one in a srw 350 and he’s claiming very good gas mileage.

Any sluggishness from this powertrain was eliminated with the tweaks made to. Fuel economy of the 2025 gmc sierra 4wd at4x.