GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Instrument Cluster System Check?

--

Go to Step 2

Go to Instrument Cluster System Check

2

Is the LOW COOLANT indicator on with the coolant level low ?

--

Go to Instrument Cluster System Check

Go to Step 3

3

  1. Disconnect the engine coolant level indicator module connector.
  2. Turn the ignition to RUN.
  3. Connect a 3 amp fused jumper between the engine coolant level indicator module connector terminal B and ground.

Is the low coolant warning indicator on?

--

Go to Step 4

Go to Step 7

4

Connect a 3 amp fused jumper between the engine coolant level indicator module connector terminals B and C.

Is the low coolant warning indicator on?

--

Go to Step 5

Go to Step 6

5

  1. Inspect for a poor connection at the engine coolant level indicator module connector.
  2. If the connection is OK, replace the engine coolant level indicator module. Coolant Level Module Replacement in Engine Cooling.
  3. Inspect the system.

Is the repair complete?

--

Go to Instrument Cluster System Check

--

6

  1. Repair a poor connection or an open in CKT 1050 between the engine coolant level indicator module harness connector terminal C and G117.
  2. Inspect the system.

Is the repair complete?

--

Go to Instrument Cluster System Check

--

7

Inspect for a poor connection or an open in CKT 68.

Did you find a poor connection or an open in CKT 68?

--

Go to Step 8

Go to Step 9

8

  1. Repair a poor connection or an open in CKT 68.
  2. Inspect the system.

Is the repair complete?

--

Go to Instrument Cluster System Check

--

9

  1. Replace the instrument cluster.
  2. Refer to Instrument Cluster Replacement .

  3. Inspect the system.

Is the repair complete?

--

Go to Instrument Cluster System Check

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