Vortec: Too much engine? (Mileage questions)
Hi, I'm getting dangerously close up upgrading my 1999 Yukon with a 5.3 engine to a 2007 Yukon XL with a 6.2 engine. I was test-driving it today and saw the display list an average MPG of 11.5. Yik...
Forum Discussion
I agree with APT, all gas engines suck unleaded at a pretty good rate when loaded heavily. There wouldn't be that much difference in mpg when each was towing, but the 6.2L would be a better performing tow vehicle as it has more power and the 6 speed.
I can't comment on the AWD system.
I can't comment on the AWD system.
