GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Check for Powertrain Control Module (PCM) Diagnostic Trouble Codes (DTCs). Refer to Powertrain Control Module Diagnosis in Engine Controls.

Are any PCM DTCs present?

--

Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls

Go to Step 2

2

Was the BCM diagnostic system check performed?

--

Go to Step 3

Go to Diagnostic System Check - Body Control System in Body Control System

3

Attempt to start the engine.

Does the engine start?

--

Go to Step 4

Go to Starting System Check in Engine Electrical

4

The SECURITY indicator lamp is on due to a malfunction in the instrument cluster. Refer to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console for further diagnosis and repair of the instrument cluster.

Is the action complete?

--

Go to Diagnostic System Check - Theft Deterrent

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