I've been towing with a 05 Envoy Denali. 5.3 w/ a 3.42 axle. Our trailer weight is 4500 dry. When it's loaded up and excess is the rear of the Envoy I would guess weight is 6500+. Acceleration and sway control is just OK, not great, so I'm looking to go to something larger, with a longer WB and more HP. Not a pick up truck fan, but wouldn't completely rule it out. The air ride, self leveling, rear suspension worries me some. Thoughts and comments appreciated.