2025 Chevy Silverado 2025 Duramax Mpg. More than a pretty face. The duramax diesel engine is rated at 20 mpg city, 22 mpg highway, and 21 mpg in combined driving.

My gas chevy got about the same mileage empty as the duramax trucks i’ve owned. The 2025 chevy silverado zr2’s duramax diesel engine has proven efficient, but we weren’t ready for its astonishing best tank of 34 mpg with 826 miles of range!