Anyone with experience towing with a Suburban

We had a 2003 Sub 1500 with the 5.3 and 3.73 rear end. Pulled a 30 foot, 6500 lb trailer. WDH and a friction sway bar. Ultimately I upgraded from P to LT tires, better shocks and GOOD maintenance. We towed in the mountains and flat. IT did OK. NOt great, OK. It revs really high, almost scary climbing, and slows down..
Pay attention to all the tips from here - tongue weight, WDH set up and stay witin your limit.

m