GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Turn the ignition switch to the RUN position.
  2. Disconnect the engine oil pressure sensor.
  3. Connect a fused jumper wire from the engine oil pressure sensor connector, cavity A to ground.

Refer to Using Fused Jumper Wires in Wiring Systems.

Did the oil pressure gauge move toward 0?

--

Go to Step 2

Go to Step 3

2

Replace the engine oil pressure sensor.

Is the repair complete?

--

System OK

--

3

  1. Remove the fused jumper wire.
  2. Backprobe the instrument cluster with a fused jumper wire from connector cavity 31 to ground.

Refer to Using Connector Test Adapters in Wiring Systems.

Did the oil pressure gauge move toward 0?

--

Go to Step 4

Go to Step 5

4

Repair the open in CKT 31 (TAN) between the instrument cluster connector and the engine oil pressure sensor connector.

Is the repair complete?

--

System OK

--

5

Replace the oil pressure gauge.

Is the repair complete?

--

System OK

--