I know that GM has a module that works with the OnStar system. Are you sure you don't have it? Do you have the premium audio system? My '09 Aura has it, it's linked in with OnStar and very easy to overlook. The only way to access it, is to hold the "talk/mute" button on the steering wheel, wait until it says "Ready" and say "Bluetooth" if you have it, the OnStar advisor lady will say "Bluetooth Menu". I really like it, but sometimes it doesn't work the greatest... I thought it was standard equipment on most 2009 GM vehicles, but I could be wrong?