GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Disconnect the engine coolant level indicator module connector.
  2. Turn the ignition switch to the RUN position.

Is the LOW COOLANT warning indicator on?

--

Go to Step 2

Go to Step 5

2

Check for a short to ground in circuit 68.

Is there a short to ground in circuit 68?

Go to Step 3

Go to Step 4

3

Repair the short to ground in circuit 68.

Has the repair been made and the system rechecked?

System OK

4

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Has the repair been made and the system rechecked?

System OK

5

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

Has the repair been made and the system rechecked?

System OK