When i towed my project Willys home last January I was not that impressed with the Suburbans towing. Just seemed to not be stable and kind of gutless. Not like a CJ2a is very heavy. Just wasnt as sure as I felt in my F150.
Remember, the chassis and suspension are the same as 2500 pickup. It's not the coil rear like the 1500. It pretty much is a suburban body on an HD truck frame.