Wiring for a 99 GMC

By WyomingBass
November 10, 2001 in 1999-2013 Silverado 1500 & Sierra 1500

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WyomingBass

Posted November 10, 2001

Hey yall i want to install a speaker box in the rear of my ext. cab sierra 99 and want to know what colors the wires or if anyone has a diagram to do this.. i dont want to rip out all the componets.. just run new wire in the harness from the rear to the speakers...

Thanks for any help yall can give me

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