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...
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would not be much different towing. Have heard the 6.2 can get not to bad empty mpg, if you are not racing it around. I tow 5000 pounds with my 5.3 373 suburban with 200,000 miles, and I am very pleased.
