I have the same situation. My Suburban 15 LT it has the tow package in it which increased our tow max from 6300 lbx to a max tow weight of 8300 lbs. We are in the process of purchasing a 2019 Jayco Jay Flight which is just 32' length with a dry weight of (including 2-30 lbs lp tanks) just under 6200. I am concerned that it won't pull it. "It's a Suburban they can do anything". LOL
I was also told that you don't travel with the water tanks full or your grey tank full which takes a lot of added weight out of the equation, which we didn't even think of that.
Do you think I will be ok. The dealership is hooking us up with the proper sway bars, braking and equalizers and are saying we should not have a problem. Can anyone give me piece of mind and let me know if I will be able to pull without blowing my motor or transmission? I can't buy both a truck and a trailer.