GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Instrument Cluster System Check?

--

Go to Step 2

Go to Instrument Cluster System Check

2

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

Is the oil pressure warning indicator ON?

--

Go to Step 3

Go to Step 6

3

Inspect for a short to ground on CKT 31.

Does a short to ground exist on CKT 31?

--

Go to Step 4

Go to Step 5

4

  1. Repair the short to ground in CKT 31.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

5

  1. Replace the instrument cluster. Refer to Instrument Cluster Replacement .
  2. Inspect the system.

Is the repair complete?

--

System OK

--

6

  1. Replace the engine oil pressure switch. Refer to Engine Oil Pressure Sensor and/or Switch Replacement in Engine Controls - 3.1L (LG8).
  2. Inspect the system.

Is the repair complete?

--

System OK

--