Prsledder
Active member
On my 3rd Duramax. Last two I put on 650,000 Kim's of highway and oilfield roads. Minimal issues with the trucks and nothing with the motors or transmissions. Chipped the first one and nothing done to the second one. They definitely have enough power and yes the fuel mileage could be better when towing however I know it would be a lot worse in a gasser combine with no power either so I am fine with it. I find that diesel pricing up north is either even with gas or slightly less 98% of the time.