GM Service Manual Online
For 1990-2009 cars only

The theft deterrent diagnostic system check tests the Body Control Module (BCM) for the operation of the Passlock theft deterrent system. For more information regarding other BCM-controlled systems, refer to Body Control System Description in Body Control System.

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Make sure the transaxle is in PARK.
  2. Turn the ignition switch to the START position.

Engine starts and the SECURITY indicator illuminates for 5 seconds, then turns off.

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.