Towed with Tahoe - not good
When I got my first large travel trailer, I was convinced that my Chev. Tahoe would tow just fine. Didn't squat much and all looked well. However, actual towing was a white knuckle experience, especially on a windy day. It was all I could do at interstate speed to keep within two lanes going the same direction. Furthermore, my fuel economy was in the 5 to 7 mpg neighborhood. It took me one trip to decide that I needed a proper tow vehicle. I moved to a 3/4 ton diesel and all is well with the world. Total stability and tremendous power climbing hills, plus 11 to 12 mpg. Don't do the Expedition, you won't be happy.