Question about 2004 Chevrolet Avalanche

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I have a 2004 avalanche that I just replaced the battery and now have a radio problem. I have the onstar and the bose system. The radio powers on (with no display) then turns off after a few seconds. There is also no sound from the onstar or the delayed locking indicator. Help... Thanks

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  • gbhetrick Sep 12, 2010

    I found the code in the manual, how do I enter it? Thanks

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  • Chevrolet Master
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Your radio is locked - it has detected the disconnection of the battery as a theft and it has locked all components. This is called the TheftLock.
To fix it you must input the security code made up of four numerical digits. This code is usually found in the original purchase papers or the manual. If you no longer have them (or it's not in there), you will need to visit the dealer to obtain the factory code from Delphi Delco Electronics. At this time, you can choose to disable the TheftLock feature so that doesn't happen again. Most dealers will charge you for that - how much depends on the dealer , but usually around $50.

Posted on Sep 12, 2010

  • Azrael SRL Sep 12, 2010

    The procedure for your exact model should also be there, in the manual's radio section: depending on the version you will have to use either the HR an MN buttons or the radio presets to load the digits

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