How do I repair the theft prevention system?

Tiny
TACEYMG
  • MEMBER
  • 1999 CADILLAC SLS
  • 105,000 MILES
Warning light comes on for Theft Prevention System needing service.
Tuesday, December 6th, 2011 AT 1:20 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

The anti theft module just might need resetting.
Try this process:
Unlock the car using the key fob.
Then use the key on the door lock, to lock and unlock the vehicle.
Crank over the vehicle with the key.
Hold down the panic button the disable alarm.
Then push the unlock button.
Start the engine.

This should reset the system.

https://www.2carpros.com/articles/how-to-reset-a-security-system

If the light still illuminated, then it is likely a bad anti theft module.
That module is located on the left hand side of the instrument panel, right of the steering column (see diagram).

Please let me know of any questions.
Thank you.
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Sunday, September 26th, 2021 AT 8:30 PM

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