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My 98 GMC suburbon 1500 tail lights are not working.I'm in desperate need of a wiring diagram.I purchased this vehicle from a friend ,and it looks like they attempted to install another wire harness for a pull behind trailer can anybody help me with this.

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Well, I would try to get the original wire harness from the dealer or from a salvage yard that is an exact match for what is supposed to be there, rather than what the friend put in.

Posted on Oct 09, 2010

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