GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Disconnect the engine oil pressure indicator switch connector.
  2. Start the engine and let it idle.

Is the Oil Pressure warning indicator on?

--

Go to Step 2

Go to Step 5

2

Check for a short to ground in circuit 31.

Is there a short to ground in circuit 31?

--

Go to Step 3

Go to Step 4

3

Repair the short to ground in circuit 31.

Has the repair been made and the system rechecked?

--

System OK

--

4

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Has the repair been made and the system rechecked?

--

System OK

--

5

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

Has the repair been made and the system rechecked?

--

System OK

--