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ZZDaryl
ZZDaryl, Chevy Technician
Category: Chevy
Satisfied Customers: 12433
Experience:  28 year experience, Master Mechanic
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Chevy cavalier: the theft system light is on how can i fix..car start

Resolved Question:

i have a chevy cavalier 1998 the theft system light is on how can i fix that it wont let the car start
Submitted: 6 years ago.
Category: Chevy
Expert:  ZZDaryl replied 6 years ago.
Did you replace the main computer ?
Customer: replied 6 years ago.
yes i replace the main computer
Expert:  ZZDaryl replied 6 years ago.
Did you have the computer programmed?
Customer: replied 6 years ago.
no but how i do that do i have to take the car to the shop or dealer
Expert:  ZZDaryl replied 6 years ago.

Yes you will need to have it programmed by a shop with a tech II programmer and then you will need to do a relearn procedure for the anti theft, procedure below.

Password XXXXX Procedure For Anti-Theft System
1. Password XXXXX procedure must be performed if Powertrain Control Module (PCM), Pass-Key (R) III module, ignition lock cylinder, steering column assembly or ignition key are replaced. A password XXXXX XXXXX between Pass-Key(R) III module and PCM to provide engine operation. If PCM is replaced, the PCM must learn the password XXXXX the Pass-Key(R) III module.
2. Insert a valid mechanical coded unlearned ignition key in the ignition switch. Place ignition switch in the RUN position. The SECURITY indicator light will come on for 10 minutes for the length of the auto learn timer. SECURITY indicator light is located on instrument panel, just below the fuel gauge.
3. When auto learn timer expires and SECURITY indicator light goes off, place ignition switch in OFF position. Remove ignition key from ignition. Wait 10 seconds.
4. Repeat steps 2) and 3) two more times. Insert the newly learned ignition key in ignition switch.
5. Place ignition switch in RUN position. The SECURITY indicator light should remain off to indicate the ignition key was learned. If security indicator does not remain off, repeat procedure.

ZZDaryl, Chevy Technician
Category: Chevy
Satisfied Customers: 12433
Experience: 28 year experience, Master Mechanic
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