Does anyone know of a way to add a bluetooth adapter (to pair with a cell phone)to the stock system that can make use of the On Star mic. and sound functions? (sending sound though the speakers)

I want to add bluetooth functionality to the system, but really don't want to go adding additional mic and speakers, unless I absolutely have to.

I've looked through the threads here, and didn't really see anything that addresses this. And I'm somewhat of a novice with stereo equipment.

Thanks in advance for any info.