GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Starting and Charging Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Engine Electrical

2

  1. Install a scan tool.
  2. Start the engine.
  3. Using a scan tool, observe the Ignition 1 parameter in the instrument panel cluster data list.

Does the voltage measure within the normal operating range?

10-15V

Go to Step 3

Go to Charging System Test

3

Replace the instrument panel cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Did you complete the replacement?

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System OK

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