JP Customs has cameras and hitchcams that say they integrate w/ GM factory NAVS....
http://www.jpcustoms.com/store/custo...cat=723&page=1
I have no idea if these work fine. I would like to know myself as I'm thinking of purchasing a 2007 H3 w/ Factory NAV.
Does anyone have a backup camera hooked up to the factory NAV system yet?