GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the engine cooling diagnostic system check?

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Go to Step 2

Go to Engine Cooling Diagnostic System Check

2

Disconnect the engine coolant level indicator module.

Does the LOW COOLANT LEVEL message turn off?

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Go to Step 3

Go to Step 4

3

Replace the engine coolant level indicator module. Refer to Coolant Level Module Replacement .

Did you complete the replacement?

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Go to Step 6

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4

Test the signal circuit of the engine coolant level indicator switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 6

Go to Step 5

5

Replace the IPC. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges, and Console.

Important: Perform the set up procedure for the IP.

Did you complete the replacement and the set up procedure?

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Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2