Man i daily drive an 08 duramax dually tool body truck....grossed 11,500 before we put any tools on it....now it prolly over 15k and it wont do over 10.5mpg....i even put a Banks tuner on it still done about the same
Yea its crazy cause my dads 06 duramax(pictured on gooseneck a few post up) does awesome on fuel....i drove it on a 200 mile trip few months ago and got this