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 OFF the ignition.
  2. Turn ON the ignition, with the engine OFF.

Does the volt indicator illuminate for five seconds during bulb check?

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Go to Step 3

Go to Step 4

3

  1. Install a scan tool
  2. Start the engine.
  3. With a scan tool, observe the Volt Lamp parameter in the Instrument Panel Cluster data list.

Is the volt lamp commanded On?

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Go to Step 4

System OK

4

Inspect for a faulty volt indicator bulb. Refer to Instrument Cluster Bulb Replacement . Did you find and correct the condition?

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Go to Step 6

Go to Step 5

5

Replace the instrument panel cluster. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

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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 2