robl45

Anyone have a wiring diagram for this and can tell me locations to find the wire and what the microphone consists of?

keg

Can't help you, but just curious, why do you want to know this? Do I see a mod coming?

robl45

I'm trying to splice my bluetooth into the factory microphone.

johnodrake

Don't have OnStar but the Nav microphone is in the driver "A" pillar.

robl45

yes, but is it just a normal microphone and where does the wire run if you want to tap into it?

kawal

I have the Service Manual and the schematics, but I'm not sure they will help you much for what you want to do. The Cellular Microphone is located in the windshield pillar on the driver's side and it has two wires to its connector, a signal wire (circuit 655, gray wire) and a drain. If you have Onstar, it is connected directly to the VCIM (Vehicle Communication Interface Module), pin 9 of connector C2, which is located in the right rear storage compartment (if you don't have a Z06). The signal passes through the VCIM, pin 2 of connector C3 to the radio via circuit 5149 (pink wire) to pin 3 of Connector C5.

With no Onstar, the voice recognition audio signal is connected directly to the radio via 5149, pink wire.