GM 6.6 & 3:73
Looking for actual input, experience not opinions without experience. Anyone that has a GM, 6.6 gas with 373 gears, towing I would like to know your experience with towing power, fuel mileage and ove...
Forum Discussion
I had a 2020 6.6 gas reg cab dually. I towed 15k lbs (gooseneck with round hay bales) many times. It was in Michigan. No issues, and had experienced some uphills from a stop.
