GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Instrument Cluster Schematics

Connector End View Reference: Component Connector End Views

1

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

Go to Step 2

Go to Instrument Cluster Description and Operation

2

Verify that the engine oil indicator is always ON.

Does the engine oil indicator operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Disconnect the oil pressure switch connector.

Does the oil pressure indicator remain lit?

Go to Step 4

Go to Step 5

4

Repair the short to ground in the oil pressure indicator signal circuit between the oil pressure switch and cavity 10 of the instrument panel cluster. Refer to Wiring Repairs.

Did you complete the repair?

Go to Step 6

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5

Replace the oil pressure switch.

Did you complete the repair?

Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3