Question about 2005 Chevrolet Silverado 2500HD 2WD

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I am putting in a used oem radio I bought and I have the tag with all the imfo, I need to know how to unlock the radio

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Turn key to run,press 1 and 4 together,hold till ------ lines show on display, next enter code..then press mn and oo will appear ,press mn again to make the last two digets agree with your code.....then press hr to make the first one or two digits agree.....then press am fm after code is confirmed,this works on my 98 gmc...wilfy

Posted on Oct 05, 2010

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Posted on Jan 02, 2017

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