I have seen alot of questions concerning the addition of rear air bags to take some of the sag out of the truck when loaded and/or pulling a trailer. I have a 33' camp trailer with a loaded weight of 7020#. With the equalizer hitch I adjusted to get the maximum height at the rear of the truck. I had considerable sag but I was happy with the way the rig handled and drove. After towing 8000 miles I found that my rear tires were cupping the inside two inches and the front tires were cupping the outside two inches. It doesnt take much sag to wear the tires this way even though I was within my 7500# tow rating. I did alot of research and decided on the total load control system. I just finished installing these and hooked up the trailer to see how it sat. With 25 PSI in the bags I was able to level the truck/trailer hookup. Anyone else with this problem might check them out.
This is my first post on this site as I just found it. I am not affiliated with tlc.
Hope this helps.