The Onstar system has an analog phone in it, and will not work in 2008. Would like to convert the phone to digital now, and use the car integrated system without tearing everything out.
There is a Motorola SYN12776 that is a Bluetooth system that has a plug to mate into a car system, however not sure if the Bose system will take it.

Any ideas how to integrate this without trashing the original car system? Or is there another option that I should consider?