| Re: 2003 GMC 2500HD Ive got an 8.1 litre chevy and despite what people want to tell you, if you drive it responsibly then it will actually get half decent mileage, you will never see diesel fuel economy but i can get the same mileage as my buddies tahoe when i drive like a responsible considerate driver (110 on the highway) when he's driving like a maniac (140+) and he has 265's on his truck if not better. I average 15-16 mpg and for a truck that will pull just about everything and start no problems at -30 then thats where im at. |