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 oil pressure switch and sender.
  2. Place the ignition switch in the RUN position.
  3. Connect a fused jumper from CKT 331 (TAN/WHT) cavity A of the oil pressure switch and sender to ground.

Does the oil gauge indicate low pressure?

--

Go to Step 3

Go to Step 4

3

Replace the oil pressure switch and sender. Refer to Engine Oil Pressure Sensor and/or Switch Replacement in Engine Mechanical.

Is the repair complete?

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Go to Instrument Cluster System Check

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4

Inspect for an open in CKT 331 (TAN/WHT) between the oil pressure switch and sender and the instrument cluster.

Did you find an open?

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Go to Step 5

Go to Step 6

5

Repair the open in CKT 331 (TAN/WHT) between the oil pressure switch and sender and the instrument cluster.

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?

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Go to Instrument Cluster System Check

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