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Radio Console wireing

I'm tring to find out the color combination on the back of a 2003 Chevy TrailBlazer radio, so that I could hook up a car ampliflier threw the factor speakers.

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  • Christopher Renner
    Christopher Renner May 11, 2010

    Does this vehicle have a Bose sound system or OnStar, and are you adding a new head unit or are you just trying to insert an amp in between the factory head unit and the factory speakers?


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A decent auto repair manual for your 2003 Chevy TrailBlazer (such as Chilton's, Clymers, Haynes, etc...) with a complete wiring diagram should give you the color codes for the factory speaker wiring. You can probably find and copy the pages you need at your local Public Library too.
Good Luck.

Posted on Feb 25, 2008

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Common wiring colors and what they do -
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