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

  1. Disconnect the connector at the Engine Coolant Temperature Sender.
  2. Connect a fused jumper wire from Engine Coolant Temperature Sender connector cavity A to ground.
  3. Turn the ignition switch to the RUN position.

Does the temperature gauge indicate HOT?

--

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?

--

Go to Instrument Cluster System Check

--

4

  1. Remove the I/P Cluster.
  2. Connect a DMM (continuity) between pin 13 of the I/P Cluster connector and cavity A of the Engine Coolant Temperature Sender.

Is continuity present?

--

Go to Step 6

Go to Step 5

5

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

Is the repair complete?

--

Go to Instrument Cluster System Check

--

6

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

Is the repair complete?

--

Go to Instrument Cluster System Check

--