So now that my onstar is obsolete (not that I ever used it anyway), and GM has provided no upgrade provision, I have nothing to lose by tinkering with the electronics.
I was thinking about this at work today, I'm an EE and I think it should be a reasonably fairly simple process to integrate an aftermarket bluetooth phone kit into the car using the onstar electronics... I.e. the built in mic, connection to the audio system etc.
Anyone happen to have wiring diagrams they can provide?? That would be a start to my research. If I do manage to figure it all out i'll gladly share all the info to make something viable and useable that otherwise is now just dead weight in our cars....
Thanks in advance,