I have a 2008 2500HD and would like to know if anyone has changed their reciever hitch? I'm towing a 7000# camper and am getting some porpoising (up and down bounce, NO sway side to side), expecially when I go over a overpass. I do have a weight distribution hitch, and seem to have it properly adjusted. I have read in some other RV forums about changing the reciever away from the OEM to a heavier after market model. (Reese or Draw-tite) Any thoughts before I do it.
