I am hooking up an XM Delphi SkyFi2 to power up when I turn the radio on. I need to supply power to unit which is switched by the key. The wiring harness that plugs into the back of the factory radio on the 2001 Sliverado that supplies power to the radio. Does anyone have the wiring diagram color code. I need a wire that is switched when the key is turned on and off.
Mark

I have an aftermarket deck installed in mine and the wire that runs to the ignition turn on for my aftermarket deck is the dark green wire in the upper left of the plug, if you are looking at it from the plug side. It should be the second wire from the left on the top. Hope this helps.