Cordey Pollyanna

2024 Duramax Fuel Mileage Per Mile. Last 4,000 miles of mixed driving local, interstate towing and not, averaged 7.4 mpg. 2020 sierra 1500 4×4 crew cab 3.0l duramax.

Since my 2021 duramax got a new ecm flash from the dealer, it’s getting even better fuel mileage mid 20mpg canadian driven at the speed limit. The duramax turbodiesel engine combines incredible torque with good fuel economy.