GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Start the engine.
  2. Connect a scan tool.
  3. Select the instrument cluster Data Menu.
  4. View the engine speed input data on the scan tool.

Does the engine speed input data on the scan tool match the tachometer on the instrument cluster?

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Go to Powertrain On Board Diagnostic (OBD) System Check

Go to Step 2

2

Replace the instrument cluster.

Is the repair complete?

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Go to Diagnostic System Check - Instrument Cluster

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