I'm looking to add a locking pin on my hitch and would also like to have some rattle-reduction. I found that the DrawTite style hitches (with the second hole) and j-pin locking pins look to fit the bill:
http://www.youtube.com/watch?v=5bR2XEKMzJQHaving the factory hitch receiver, I'll have to add a 7/16 hole to even make it work, but I'm wondering if other folks have used this system and what your impressions are?
Dan
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2005 Silver CRD Limited

245/75R16 GoodYear Duratracs
Fumoto drain | ProVent CCV Filter
Stanadyne FM100 filter | Cummins fuel pump
GDE Eco | SEGR | BoulderBars | FrankenLift | Frankenskids