GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Instrument Cluster Schematics

1

Did you review the Instrument Cluster Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Instrument Panel, Gages and Console

2

Verify that the oil gage indicator is inoperative.

Does the oil gage indicator operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

  1. Disconnect the oil pressure switch connector.
  2. Connect fused jumper from the oil pressure switch connector to chassis ground.

Does the oil pressure indicator illuminate?

Go to Step 4

Go to Step 5

4

Replace the oil pressure switch.

Did you complete the repair?

Go to Step 8

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5

  1. Disconnect the instrument panel cluster assembly connector C2.
  2. Test for a short to ground or open condition.
  3. Test the YEL/BLK wire from cavity 3 to the oil pressure switch.

Is a short to ground or open condition present?

Go to Step 6

Go to Step 7

6

Repair the open in the YEL/BLK wire between the instrument panel cluster assembly and the oil pressure switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 8

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7

Repair or replace the instrument panel cluster printed circuit. Refer to Printed Instrument Cluster Circuit Replacement .

Is the repair complete?

Go to Step 8

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8

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3