GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Content Theft Deterrent (CTD) System Check performed.

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Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2

  1. Turn the ignition switch to the ON position.
  2. With a scan tool select Instrument Panel Cluster , Special Functions, and command the Security message ON.

Does the Security message turn ON and OFF when commanded?

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Go to Diagnostic System Check - Body Control System

Go to Step 3

3

Replace the Instrument Cluster. Refer to Instrument Cluster Replacement

Is the repair complete?

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Go to Diagnostic System Check - Instrument Cluster

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