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what i can rememeberwell you need a good mechanic first and a even better tools second. here it is i know that most Chevy's have either 4 or 6 keys to them and each key code has to be cracked using a diagnostic tool which has an obdII connector if your using it on a GM car over 1995, and i don't think that it can possibly be reset because you need to install a new code after that (it just doesn't go through my head for some reason) i think all keys have the same code and its a 27 digit code this is what i remember goes so I'm not so sure but what I'm sure of is that you need a digital scanner-like digital tool connected to the car's PCM and you gotta crack the codes because whoever has that tool knows how to use it... Answerdisarm theft system

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I had this problem with my 1997 Chevrolet Cavalier after having to replace the PCM. I called a GM dealer and this is what they told me to do:

Turn on ignition to attempt start

release key in the ON position

let theft light to stop blinking (about 10 minutes)

turn ignition to off position

wait 5 seconds

repeat steps two more times for a total of 3 times (30 minutes of total time)

this will reset the pass-lock codes on the next attempt to start up the car.

The car should start after doing this.

Good Luck

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โˆ™ 2011-05-23 19:19:32
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Q: How do you reset unlock the theft deterrent system on a 1997 Chevy Cavalier?
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