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 engine coolant temperature gauge sensor.
  2. Connect a fused jumper from the Engine Coolant Temperature Gauge Sensor CKT 35 (DK GRN) wire Cavity A to ground.
  3. Place the ignition switch in the RUN position.

Does the temperature gauge indicate HOT?

--

Go to Step 3

Go to Step 4

3

Replace the engine coolant temperature gauge sensor. Refer to Engine Coolant Temperature Sensor Replacement in Engine Controls.

Is the repair complete?

--

Go to Instrument Cluster System Check

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4

Inspect for an open in CKT 35 (DK GRN) between the engine coolant temperature gauge sensor and the instrument cluster.

Did you find an open?

--

Go to Step 5

Go to Step 6

5

Repair the open in CKT 35 (DK GRN) between the engine coolant temperature gauge sensor and the instrument cluster.

Is the repair complete?

--

Go to Instrument Cluster System Check

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6

Replace the temperature gauge. Refer to Instrument Cluster Replacement .

Is the repair complete?

--

Go to Instrument Cluster System Check

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