GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the instrument cluster diagnostic system check?

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Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

Inspect the engine oil level.

Is the engine oil level at the FULL mark on the dipstick?

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Go to Step 4

Go to Step 3

3

  1. Fill the engine oil level to the full mark on the dip stick
  2. Turn the ignition switch to the RUN position.

Does the low oil indicator illuminate for approximately 3 seconds and turn off?

--

Go to Diagnostic System Check - Instrument Cluster

Go to Step 4

4

Test for powertrain control module (PCM) DTCs. Refer to Powertrain On Board Diagnostic (OBD) System Check (RPO 3.1L) or Powertrain On Board Diagnostic (OBD) System Check (RPO 3.8L) in Engine Controls

Is the action complete?

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Go to Step 5

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5

  1. Connect a scan tool to the vehicle data link connector (DLC).
  2. Enter the instrument cluster WOW mode.
  3. Command the instrument cluster indicators off.

Does the low oil indicator turn off?

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Go to Powertrain On Board Diagnostic (OBD) System Check (RPO 3.1L) or Powertrain On Board Diagnostic (OBD) System Check (RPO 3.8L) in Engine Controls

Go to Step 6

6

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Is the repair complete?

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Go to Diagnostic System Check - Instrument Cluster

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