The B&W Trailer Hitches GNRK1067 Turnoverball Gooseneck Hitch GM 2500/3500 HD '01 - '10 6.5/8 ft is a very high-quality hitch when you need it, and a level bed when you don't.
With no drilling, welding or bed removal required, this hitch installs easily and completely underneath the bed of the truck.