GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Instrument Cluster System Check?

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Go to Step 2

Go to Instrument Cluster System Check

2

  1. Disconnect the connector at the Engine Coolant Temperature Sender.
  2. Connect one red lead of the J 33431-C to connector cavity A of the Engine Coolant Temperature Sender connector.
  3. Connect the other lead of the J 33431-C to ground.
  4. Turn the ignition switch to the RUN position.
  5. Adjust the resistance dial to 1305 ohms and then to 49.5 ohms.

Does the temperature gauge match the values given?

    • 1305ohms Cold, approx. 100°F (Gas)/160°F (Diesel)
    • 49.5ohms Hot, approx. 260°F

Go to Step 3

Go to Step 4

3

Replace the Engine Coolant Temperature Sender. Refer to Engine Coolant Temperature Sensor Replacement in Engine Cooling.

Is the repair complete?

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Go to Instrument Cluster System Check

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4

  1. Remove the I/P Cluster.
  2. Connect a B+, 10 amp fused jumper wire to cavity 22 of the I/P Cluster assembly.
  3. Connect one red lead of the J 33431-C to cavity 13 of the I/P Cluster assembly.
  4. Connect the other lead of the J 33431-C to ground.
  5. Adjust the resistance dial to 1305 ohms and then to 49.5 ohms.

Does the temperature gauge match the values given?

    • 1305ohms Cold, approx. 100°F (Gas)/160°F (Diesel)
    • 49.5ohms Hot, approx. 260°F

Go to Step 5

Go to Step 6

5

Locate and repair the cause of resistance in CKT 35 (DK GRN) between the I/P Cluster and the Engine Coolant Temperature Sender. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Instrument Cluster System Check

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6

Replace the I/P Cluster. Refer to Instrument Cluster Replacement .

Is the repair complete?

--

Go to Instrument Cluster System Check

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