Apr 25, 2010 #1 J Joe Active member Joined May 12, 2008 Messages 1,892 Reaction score 0 Points 36 I have a 2001 GMC sierra, 5.3 V8, 4-WD, SLT, extended cab, short bed truck. I want to increase the gas mileage on it. Could I just get a bigger tank if it would fit? What's the best thing to do?
I have a 2001 GMC sierra, 5.3 V8, 4-WD, SLT, extended cab, short bed truck. I want to increase the gas mileage on it. Could I just get a bigger tank if it would fit? What's the best thing to do?