Figured I'd try posting on here before taking the truck in for diagnostics
I have 2002 gmc sierra 2500hd stock duramax. Ever since I got the truck it's been lacking power. I have more power while towing with my 1500 silverado than I do with this truck right now.
No check engine lights...
So, I hooked up the 35 ft 5th wheel that is 15k and pulled it up to my families property. This is my first long pull with the truck. I had my edge j/a on the tow setting. It did great on the freeway, awesome up the canyons where the speed limit was 55.. Pulled like a champ.. Then I got to...