2013 GMC SIERRA RADIO WIRING DIAGRAM

SilveradoSierra • Radio wiring : Electrical Manuals
May 29, 2012Chevy Truck Forum | Silverado Sierra GMC Truck Forums. Radio wiring. I dont have a diagram for that year, u could prally goto the electrical section and goto downloads and goto the gmupfitter link and look at their diagrams OK -- my radio harness has only one orange wire, so the amp turn-on may be the answer for the extra wire -- also
GMC Alarm, Remote Start, and Stereo Wiring
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