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
davehultin wrote:
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. Yikes! I'm second-guessing myself if I should have that much engine.
It's sole purpose in life will be to pull our camper, which is about 4500 pounds. I'm sure a 5.3 or 6.0 would be MORE than enough, but I'm wondering if a larger engine like the 6.2 will actually be more beneficial (in terms of mileage) when I'm pulling a trailer.
In other words, I know my 5.3 drops from 15 to 10 MPG on the road when pulling a trailer. Will the 6.3 have less of a drop because it's not working as hard? Will is also come in around the 10 MPG range?
This is a really beautiful truck, but I'm gonna kick myself if I get it and have to spend all my camping money at the gas station...:(
Are you sure it's a 99 and not a 2000? My 99 tahoe 5.7 tows my 7000 lb TT ok with lots of mods though and get 10 mpg. Not towing 20 mpg at 65 mph. At 2500 lbs less I would think it would do ok.
