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chvythndr
06-24-2012, 02:34 PM
2002 Z71 in sig below, stock head unit says LOC & won't turn on, I remember a thread years ago about fixing this issue but couldn't find it. Thanks!
NHurless93
06-24-2012, 03:49 PM
http://www.fullsizechevy.com/forum/general-discussion/audio-video-electronics/168417-radio-locked.html

I think this is what your looking for