GM Interface for A/M Nav
 

Well I went with the Pioneer Z2 and my H3 is still in the installation shop. Apparently they ran into a problem with the onstar/chime interface. They think it may me a faulty piece. I hope that is all it is and not something to do with the compatability of my truck.

I know that Hummer switched from Class-2 Bus to LAN. And mine is LAN. Not sure what either is though, or if this will pose a problem.