2024 Duramax Fuel Mileage. However, as long as the maintenance has been kept in check, slightly higher. I have 12,000 mile on a 2022 3500 gmc duramax, 10 speed 3:42 dually rear end 4×4, terrible mileage.
The duramax turbodiesel engine combines incredible torque with good fuel economy. According to the most recent fuel economy testing from car and driver, the diesel silverado 2500hd gets 18 mpg in the city and 21 mpg on the highway.
