GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Lighting Systems Diagnostic System Check?

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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?

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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. Use the Multifunction Switch (Headlamp Dimmer /Flash-to-Pass Switch) to switch to high beams.

Do the headlamps function properly?

--

Go to Step 4

Go to Step 5

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, Console and Gauges.

Is the repair complete?

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Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3