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I'm installing a Pioneer single din head unit in my C5 and can't figure out where this plug will plug in. I'm keeping the bose speakers for now so I do have the interface for that to work but can't find anywhere to plug this in.
I'm thinking this may go to the On-Star please help me if i'm wrong. When everything but that plug is hooked up the head unit does not power on. All wiring is hooked up as it should be.
Thank you VinceC5 that was it the plugs were reversed. I switched them and everything worked perfect. Thank You again for your time to answer my question.
Mark
Radio wiring
