2024 Duramax Fuel Mileage Specs. We go over more details about this. Fuel economy is better with 21/23 mpg city/highway versus 14/17 mpg city/highway (duramax vs 6.2l v8) in the 2023 gmc sierra at4 trim.
Does anyone have any real world data on the 2024 6.6 gas v/s 6.6 diesel fuel economy. That all adds up to a 36,000 lb towing capacity.