Review on Enhance your Cobra Radar Detector with Radar Mount Mirror Wire Power Cord: Reliable and Fuse-Protected Solution by Fred Vazquez

Installed on Silverado 03 with Onstar, time and navigation mirror. I saw reviews where people try to sharpen plug taps and pierce wires behind a mirror, everything is much easier! For my truck and most likely the GMC Sierra, the yellow wire was power and the black wire was ground. You just have to be careful with the cables as the wires are very thin. Don't be a gorilla, don't rush to put the roosters in the fork! Mine didn't go all the way into the transom cap, but the radar works fine. The smaller faucets they supply come in handy with a variety of factory tableware styles!