bluetooth connectivity

let me guess, it has OnStar, right? if so, it has to be disabled otherwise it is not going to work right (basically you will have to reset cars thing to constantly reconnect...). Back in the day I had to disable onstar by soldering TTL (basically a 9-pin serial connector) to disable it, however, wonders of technology are moving along, and I believe it can be done with a programmer with a software command via that (try dealer). Good luck.