2025 Gmc Sierra 2025 At4 Mpg. The specs below are for the 2025 gmc sierra 1500 pro 2wd, the sierra 1500 is available in a variety of configurations, the complete details of which can be found on gmc.com. 1984 to present buyer's guide to fuel efficient cars and trucks.

Fuel economy of the 2025 gmc sierra. View detailed gas mileage data for the 2025 gmc sierra 1500.