2024 Gmc Sierra At4x Mpg Comparison. The at4x has the 6.2, and it is a thirsty engine. Edmunds also has gmc sierra 1500 pricing, mpg, specs, pictures, safety features, consumer reviews and more.
With its base engine, the 2024 sierra is rated at up to about 19 mpg in the city and 22 mpg on the highway. The specs below are for the 2024 gmc sierra 1500 pro 2wd, the sierra 1500 is available in a variety of configurations, the complete.