Personally, in my opinion, the trailer you're looking at is too big for that van.
It's over your max tow weight, that number is mostly for flat towing. You would also be over your GCWR.
Even though you have the same gvwr as a 2019 and older GMC 2500 Sierra gasser, and you may very well stay within the payload number, those two weights put you over.
Something smaller at around the 6500 gvwr trailer or lower would be best suited for that van.
Good luck
