AK49BWL
GMT400 Forever!
I have 235/75R15s on mine, bought them new a few weeks after the truck. I think the 4x4 trucks just inherently get worse mileage, my 99 4-door 4x4 with 3.42s topped 20 only a couple times with efans and a stock tune, my mom's identical but 2005 won't even get that with 3.73s and a slight tune... But would probably do better if the clutch fan wasn't still there lol. Of course, driving habits do have a play in it too...