GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION: Use this diagnostic procedure in order to diagnose the anti-lockout feature only if the other functions of the door lock system are operating properly.

1

Did you perform the Power Door Locks System Check?

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Go to Step 2

Go to Power Door Locks System Check

2

  1. Insert the key in the ignition switch cylinder. Do not move the ignition switch from the OFF position.
  2. Open the driver's door.

Does the key-in ignition chime operate?

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Go to Step 3

Go to Diagnostic System Check - Audible Warnings in Instrument Panel, Gauges and Console

3

Replace the BCM.

Is the repair complete?

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Go to Power Door Locks System Check

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