Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
I am sorry that you have not been helped yet. I just came online and saw your question.
Ok, are you looking for where the wires run to physically connect to them by hardwiring in, or do you need the wire colors for them at the back of the factory audio unit harness connectors?
In either case, I will need the vin number to pull the schematics and if you have the audio model number as well
USB is red/violet for positive and black for ground
Microphone is black/brown for low reference and dark blue for signal
dont have a routing for them, sorry. I can opt out and see if anyone else does