Hey I have a serious question for you guys. I am in medical sales and need an SUV to carry some of my products. I also have a 17" boat and my wife has a medium size pull behind RV. I am looking at a used 05 Yukon and also a used 05 Grand Cherokee. I think both will be able to pull what I need but my question is on MPG. I know I shouldn't (and don't) expect too much with the SUV, but what are you guys getting with your Yukons or Tahoes? Oh, it isn't the XL but the regular Yukon. THanks!