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. Turn the ignition switch to the RUN position.

Does the temperature gauge indicate cold, or below 100°F for gasoline engines and 160°F for diesel engines?

--

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

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4

  1. Remove the I/P Cluster.
  2. Connect a DMM (continuity) between pin 13 of the I/P Cluster connector and ground.

Is continuity present?

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Go to Step 5

Go to Step 6

5

Locate and repair the short to ground 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?

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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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