Don't forget the weight of fuel and water,(in the storage tanks). Food and gear add weight real fast. You have to add that weight to your total capacity. Do not listen to the RV salesman. They will frequently tell you can pull more than you should. It's not just the gear ratio. Heavy duty shocks, radiator, breaks, transmission, etc. I have pulled 2 different TT with a Suburban just like yours-it's not a good, or safe idea. If you need passenger space and power-I bought a 1 ton van. It's not too hard to find a used work van-they're inexpensive, not pretty, but will do the job.