yeah make sure u get a weight distributing hitch...for heavy trailers (boats for example) wo a WD hitch setup, i'd be for putting some bags back there. We can sure feel our boat behind ours...suspension is much softer than in my tundra...the tundra (3/1.5 lift, off road package, load range E tires) squats maybe 1/2 inch but the yukon squats noticeably when u hook er up...not to the point its dragging but it def no longer sits ass high...u can watch the back bumper go down as you crank the tongue jack....its not bad with our boat but if we were to go to the 24 footer we want to eventually get, we'd certainly put some airbags back there or possibly trade to a 6.0. but as far as towing goes powerwise, cant even tell the boat is back there. tranny hunts less than my tundra, but alot of that might be the larger tires contributing on my truck, i dunno...