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Thanks JKmotor but the installer told me that the Onstar works off the factory amp but my audio setup is all aftermarket products(speakers, amps, and headunit). Is there an adapter for OnStar to work off my aftermarket amp/speakers??

:nonod: I'm a newbie to this forum but I have an 04 Yukon with aftermarket speakers and amps. My question is how do I incorporate my OnStar with these aftermarket parts? I know that the OnStar worked off the factory amp but is there an adapter that I can purchase to get my OnStar up and...