GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you inspect the system for any instrument cluster Diagnostic Trouble Codes (DTCs)?

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Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

Inspect the system.

Are there any instrument cluster DTCs stored in memory?

--

Go to the applicable DTC table.

Go to Step 3

3

  1. Install a Scan Tool .
  2. Turn the ignition switch to the RUN position.
  3. Command the SECURITY indicator to turn on.

Does the SECURITY indicator come on when commanded?

--

Go to Step 4

Go to Step 5

4

  1. Turn the ignition switch to the RUN position.
  2. Command the SECURITY indicator to turn off.

Does the SECURITY indicator turn off when commanded?

--

Go to Content Theft Deterrent (CTD) System Check in Theft Deterrent

Go to Step 5

5

  1. Replace the instrument cluster. Refer to Instrument Cluster Replacement .
  2. Inspect the system.

Is the repair complete?

--

Go to Diagnostic System Check - Instrument Cluster

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