I am hauling +- 3000 lb commercial cap on a 2019 2500HD CCLB un-modified at this point. It drives like a Cadillac, can't really tell it is there. It does not have the height of a truck camper so that would make a difference in sway probably. I am right at the limit on tires, but I have 19.5s to put on it when I wear out the factory tires or when I add an in bed auxiliary fuel tank. I had this cap on a 2013 2500HD CCSB and added 3500lb helper springs, air bags and upgraded shocks and it didn't handle as well as the 2019 un-modified.