GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

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

Go to Step 2

Go to Symptoms - Instrument Panel, Gages and Console

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

--

5

Replace the oil pressure switch.

Did you complete the repair?

Go to Step 6

--

6

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3