Would like to know what mileage you Chevy 6.0 owners get wile towing (6000-8000 pounds). Also mileage while not towing. Looking at Chevy 2500hd w/6.0 gas eng. and 4:10 gear.
Our last trip this year was from Southern Illinois to Branson. Averaged 9 towing and 16 running around. 2015 6.0, 4.10 and tow a 30' travel trailer weighing around 7400lbs. Pulling the steepest hills around Branson, we saw 2mpg :)