GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the instrument cluster diagnostic system check?

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Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

  1. Connect a scan tool.
  2. Turn the ignition on.
  3. Turn the headlamps on.
  4. Read analog dimming data.
  5. Turn the headlamp switch.

Is the voltage value within the specified range?

0-14V

Go to Step 3

Go to Interior Lights Dimming System Check

3

Does the DIC display dim?

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Go to Diagnostic System Check - Instrument Cluster

Go to Step 4

4

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

Is the repair complete?

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Go to Diagnostic System Check - Instrument Cluster

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