GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Important: All V8 engines are equipped with a coolant level latching circuit. Refer to Circuit Description and cycle ignition from OFF to RUN before performing this procedure.

1

  1. Disconnect the engine coolant level sensor.
  2. Put the igniton in the RUN position and turn the engine OFF.

Does the indicator turn ON?

--

Go to Step 2

Go to Step 4

2

  1. Turn the ignition OFF.
  2. Disconnect C200A from C200D.
  3. Connect a test lamp from terminal A17 on C200A to B+.

Does the test lamp light?

--

Go to Step 3

Go to Step 5

3

Repair a short to ground CKT 68 between C200A and the engine coolant level sensor.

Is the repair complete?

--

Go to Instrument Cluster System Check

--

4

Replace the engine coolant level sensor. Refer to Coolant Level Sensor Replacement .

Is the repair complete?

--

Go to Instrument Cluster System Check

--

5

Connect a test lamp from terminal A17 on C200D to B+.

Does the test lamp light?

--

Go to Step 6

Go to Step 9

6

  1. Disconnect connector C3 from the body control module (BCM).
  2. Connect a test lamp form terminal C15 on connector C3 to B+.

Does the test lamp light?

--

Go to Step 7

Go to Step 10

7

  1. Remove the instrument cluster.
  2. Connect a test lamp from instrument cluster harness connector terminal A6 to B+.

Does the test lamp light?

--

Go to Step 8

Go to Step 11

8

Repair a short to ground in CKT 68 between the instrument cluster, C200D and body control module (BCM) connector C3.

Is the repair complete?

--

Go to Instrument Cluster System Check

--

9

Repair the instrument cluster. Refer to Instrument Cluster Replacement .

Is the repair complete?

--

Go to Instrument Cluster System Check

--

10

Repair the body control module. Refer to Body Control Module Replacement .

Is the repair complete?

--

Go to Instrument Cluster System Check

--

11

Repair the instrument cluster. Refer to Instrument Cluster Replacement .

Is the repair complete?

--

Go to Instrument Cluster System Check

--