6000 pound tow rating seems like your Suburban does not have the HD towing package, or it would be about 8000 pounds. If you plan to tow any high walled RV, you need a heavy duty transmission cooler. The aerodynamic drag will cause the transmission unlock the torque converter and shift frequently, which is causes more heat than non-towing or towing low walled trailers. Do you know
6000 pound tow rating is tied to a total trailer + vehicle weight including 1 or 2 occupants. If you have 800 pounds of people an cargo, then the trailer rating will drop by 500 pounds. If you want to stay under all ratings, you will want to stay under 5000 pounds, maybe 4500 pounds dry rating.