I have a 2000 SL2 that I bought used. I recently had to do some work which required disconnecting the battery. Apparently, there is some sort of anti-theft stuff that requires entering a code to get the radio to work. All the radio says is LOCK. The manual says to go to the dealer. There has to be another way.
It's an anti-theft measure. The stereo is locked with a 4 digit code. If you enter the correct code, it will unlock. The dealer can look up the unlock code based on the serial number or something.
I believe you use the tune and seek buttons to enter the digits.
Before I changed my battery, I purposefully set the unlock code myself, because I wasn't sure what the default is, and didn't want to be locked out of the Stereo. Then, I disconnected the battery, put in the new one, and unlocked the stereo with the code I just set. It worked good.
In your case, I think you can try guessing the numbers. How much free time do you have? You could also guess an easy sequence, like 1234. maybe the previous owner had to change the battery too, and set the code to something easy.
Thanks.
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Sorry to say, you must go to the dealer on this one unless you get lucky entering the number sequence. If I remember correctly, you should be able to do some button sequence which will display a number that if given to Saturn will yield an unlock code.
Seems to me that they should be able to determine the proper code from the model and serial numbers on the radio (requires removing the radio from the dash) or from the VIN if this is the original radio.
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