2024 Hd Duramax 2024 Mpg. My average mpg in 5000 miles is 17.4 hand calculated with an average speed of 40.3 mph. I would never believe anyone that says they get 20+ mpg with their duramax diesel in a 2500 or 3500.
I towed a ~5,000 pound trailer at 70 mph and was getting 14 or so mpg. Just to update everyone on the bank power parts for the 2024 hd duramax.