icanfixall
Official GMM hand model
I will be driving a duramax 4500 tomorrow cross country and the tanks are confusing. How large is the fuel capasity and why do I have to fill the front tank before the rear. Also as the level drops will I see the tanks switch like in my F350 or does it switch when a tank is mt. The new owner just bought the rig with 33000 miles on it and has no idea what it does... Thanks guys
