GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Connector End View Reference: Cooling System Connector End Views

1

Did you perform A Diagnostic System Check-Engine Cooling?

Go to Step 2

Go to Diagnostic System Check - Engine Cooling

2

Start the engine.

Does the CHECK ENGINE TEMP indicator illuminate?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

3

With a scan tool, command the CHECK ENGINE TEMP indicator ON and OFF.

Does the CHECK ENGINE TEMP indicator turn ON and OFF when commanded?

Go to Engine Overheating

Go to Step 4

4

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

Is the replacement complete?

Go to Step 5

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5

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3