Question about 2005 Chevrolet Cobalt

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My 2005 chevy cobalt factory radio is locked

My 2005 chevy cobalt factory radio says it is locked. how do i unlock it?

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  • jenb863 Dec 21, 2008

    You can't. I had to take it back to the dealer and they replaced the entire stereo... THEN it happened again and they seemed to have fixed it - but said it's most likely the car itself (the computer). Still have the problem randomly with the second new stereo from GM. Good luck with yours!

  • Anonymous Mar 20, 2009

    I have given up. I just figure I have to budget a trip to the dealer a couple times a year to "unlock" the radio.
    I'll never buy GM vehicles again. The government is giving the US automakers a bailout for making troubled cars. Brilliant.

  • msalc Apr 09, 2009

    This happens to me often...right after I start the car and begin to drive. I have to turn off the ignition and restart the car for it to go away.



    I asked the dealership to look at the problem, but they said there was nothing wrong.



  • Anonymous Mar 14, 2014

    2005 chevy cobalt 2.2 ecotec speedometer dont work and wont shift gears

  • Anonymous Mar 15, 2014

    2005 chevy cobalt no power to fuel pump

  • Anonymous Mar 17, 2014

    Radio says locked

  • Anonymous Mar 24, 2014

    installed another factory radio had it unlocked at dealer and now have no sound from speakers could it be the amp

  • Anonymous Mar 24, 2014

    bought used radio for truck says its locked

  • Anonymous Mar 31, 2014

    Needed to unlock radio 2007 chevy cobalt

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There are only 2 things you can try to fix this yourself: turn off the engine and open the driver side door (to turn the radio off). Wait 5 minutes, start your car.
If that does not solve it, turn off your engine, disconnect the car battery, wait about 5 minutes. Reconnect the battery (negative pole first - black connector) and try your radio again.

If neither one of these two fix your problem, I am afraid only a GM service center or dealership can fix the problem. The Cobalt is notorious for all kinds of electrical issues.

Thanks for using the fixya forums!

Posted on Mar 28, 2009

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Go on u tube they show u how to fix it with videos

Posted on Dec 28, 2014

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It would be a good idea to have them write it down for you, and maybe even keep it on your owners manual in case this happens again. They will probably charge you 1hr labor for this which will be somewhere between $80 and $120.

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2005 chev cobalt


I am sorry, but the factory default radio in all 2005 cobalt models does not have auxiliary audio input jacks anywhere. I wish they did.

Thanks for using the fixya forums!

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