Fuel Mileage On 2024 Duramax. Going next week to order my truck, and i'm seriously torn on which to get. 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.

Does anyone have any real world data on the 2024 6.6 gas v/s 6.6 diesel fuel economy. The 2024 silverado duramax acted as a tow rig for us this week, and actually ended up being quite enjoyable to rack up some miles on.