Bionic Man wrote:
I had a 2011 Yukon Denali XL, and used it to tow a 7000 pound boat. Engine and transmission temps always ran high (would go over 240* in the mountains), and I never felt comfortable with the stability of the rig (read as the boat would push the SUV around). It was ok to tow at 65 MPH, but at 70, it would wander some. I never felt safe above 70 (which can make it tough to pass on a 2-lane road).
If you don't have mountains, and are using a WDH, you will likely be ok, but not ideal.
I currently run a 2011 Yukon Denali, pulling a 7200lb trailer. I live on the coast so no mountains. It does it, but it does tax the mechanics. Ive upgraded both the stock radiator and transmission cooler. Ive also installed a set of timbren helpers in the back, to give the air suspension some help. Ive been camping for a long time, had many different tow vehicles...both 3/4 and 1/2 ton.
Guess it all boils down to risk vs reward, the 3/4 ton will always tow better sure. But in my case, its more than just a tow vehicle, its a DD. So the other 95% of my driving I have to deal with the 3/4 ton beast. Good Luck!