2001 CHEVY SILVERADO WIRING DIAGRAM RADIO

SilveradoSierra • Radio wiring : Electrical Manuals
May 29, 2012Hello -- I replaced factory radio in a 2002 Silverado with aftermarket unit (the factory radio connector had been removed). The wiring harness includes three dark green wires (solid green, no stripe): one is 12V+ (switched by ignition), one is for a speaker, but I'm not sure what the third one is for.