I have a 2000 pontiac grand am and I would like to know what is wrong with the car My stereo just keeps going into LOC and I keep having to unlock it. My battery has not been unhooked. which that is supposed to be the only way it goes into loc. it is on one minute than i shut my car off and start it up later and the stereo is in loc

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2000 Pontiac grand am 4 cylinder