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 ON the ignition switch.
  2. Connect the diagnostic scan tool.
  3. Select IPC Output Menu.

Does the scan tool indicate that the engine coolant temperature indicator is ON?

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Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls

Go to Step 3

3

Replace the instrument cluster (IPC). Refer to Instrument Cluster Replacement

Did you complete the repair?

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Go to Step 4

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4

Operat the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2