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. Turn the ignition switch to RUN.
  2. Connect the scan tool.
  3. Select the Instrument Cluster Inputs menu.
  4. Examine the scan tool input data for the VOLTS indicator.

Does the VOLTS indicator input data match the scan tool indicator input?

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Go to Charging System Test in Engine Electrical

Go to Step 3

3

Replace the instrument panel cluster. Refer to Instrument Cluster Replacement

Did you complete the repair?

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Go to Step 4

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4

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2