Symptoms - Theft Deterrent. Buick GL7 (Export) 2000

For 1990-2009 cars

Important: The following steps must be completed before using the symptom tables.

Perform Diagnostic System Check - Theft Deterrent before using the Symptom Tables in order to verify that all of the following are true:

• | There are no DTCs set.

• | The control module(s) is operating properly.

### Visual/Physical Inspection

• | Inspect for aftermarket devices which could affect the operation of the Theft Deterrent System. Refer to Checking Aftermarket Accessories in Wiring Systems.

• | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

### Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

### Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

SECURITY Indicator Always On or Flashing

SECURITY Message Inoperative