GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the IPC Diagnostic System Check?

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Go to Step  2

Go to Diagnostic System Check - Instrument Cluster

2

  1. Connect a scan tool to the data link connector (DLC).
  2. Disconnect the coolant level switch.
  3. Ensure that the ignition switch is in RUN.
  4. View the IPC coolant level switch Data List parameter.

Is the coolant level switch input OFF?

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Go to Step 4

Go to Step 3

3

Repair the short in CKT 1478 (LT GRN). Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Diagnostic System Check - Instrument Cluster

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4

Replace the coolant level switch. Refer to Engine Coolant Level Switch Replacement in Engine Cooling.

Did you complete the repair?

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Go to Diagnostic System Check - Instrument Cluster

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