GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the instrument panel cluster (IPC) system check performed?

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Go to Step 2

Go to Instrument Cluster System Check

2

  1. Turn the ignition switch to the RUN position.
  2. With a scan tool select Instrument Panel Cluster, Data Display, and Data.
  3. Read the Monitored Coolant Temperature.

Is the Monitored Coolant Temperature an accurate representation of the engine temperature?

--

Go to Step 3

Go to Temperature vs Resistance

3

With a scan tool select IPC, Special Functions, and command the Engine Overheated message ON.

Does the Engine Overheated message turn ON and OFF when commanded?

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Go to Engine Overheating in Engine Controls

Go to Step 4

4

Replace the IPC. Refer to Instrument Cluster Replacement

Is the repair complete?

--

Go to Instrument Cluster System Check

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