2016 Chevy Suburban w Towing Package

One of the problems with towing with a Tahoe/Yukon/Suburban is the coil spring rear and tracking bar setup. It isn't symmetrical, so as the axle moves up and down with respect to the body, it shifts left and right, resulting in bump steer. A long trailer really amplifies this, so if you get a combination of chucking/porpoising and side loading, or heavy braking, it can get pretty squirrely especially when the bushings aren't in good condition. For that reason I think that anything over about 25 feet is not very pleasant to tow with a Sub unless you really upgrade the hitch and/or suspension.