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
All three engines will likely get the same FE as your 1999 5.3L when towing. The 6.2L/6-spd combo will be a rocket compared to what you currently have though. unloaded fuel economy shoudl be similar to your current truck too. We get about 2MPG better under all conditions in our 2011 3/4 ton Suburban than our prior 2003 F-150, with far more power. If this will be a dedicated TV, I highly recommend a 3/4 ton. But for your weight limit, the 6.2L should be fine. I personally do not like the AWD system mated to the Yukon Denali.
