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.

Did the oil pressure gauge move toward HIGH?

--

Go to Step 2

Go to Step 3

2

Replace the oil pressure sensor.

Is the repair complete?

--

System OK

--

3

Backprobe the instrument cluster with a test light from connector cavity 15 to B +.

Refer to Using Connector Test Adapters in Wiring Systems.

Did the test light illuminate?

--

Go to Step 4

Go to Step 5

4

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

Is the repair complete?

--

System OK

--

5

Backprobe the instrument cluster with a test light from cavity 31 to B +.

Did the test light illuminate?

--

Go to Step 7

Go to Step 6

6

Repair the open in CKT 451 (BLK/WHT) between the instrument cluster connector and G 108.

Is the repair complete?

--

System OK

--

7

Replace the instrument cluster.

Is the repair complete?

--

System OK

--