Hello audiophyles - I have a recently acquired 2008 Suburban K1500 LTZ that has the factory installed optional audio system with Bose speakers and a head unit called "Navigation System-Touch Screen w/CD&MP3". It works fine but it does not have bluetooth compatibility as the '09 and '10 models of the same head unit do. I would like to install an adapter or something to make it act like it would if it did have this feature. I've tried going through local dealer, GM cs, and ISS-GM cs with no luck. The cs folks seem to be unknowing and not overly willing to chase down a solution. Do any of you have any experience with this or could you point me in a direction to pursue? Thank you!