GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you perform the Lighting Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Verify that the high beam indicator is always on.

Does the high beam indicator operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

  1. Turn the ignition switch to the RUN position.
  2. Turn the headlamp switch to the HEAD position.
  3. Place the multifunction headlamp dimmer switch to the high beams position.

Do the headlamps function properly?

Go to Step 4

Go to Symptoms - Lighting Systems

4

Using a scan tool, select IPC, Special Functions, and command the high beam indicator lamp ON, then OFF.

Does the lamp turn ON and OFF when commanded?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 5

5

Replace the IPC. Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console.

Did you complete the repair?

Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3