GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Power Door Lock System Check performed?

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Go to Step 2

Go to Power Door Locks System Check

2

  1. Turn the ignition to OFF.
  2. Install a scan tool.
  3. Turn the ignition to ON.
  4. Display the driver door module (DDM) outputs.
  5. Toggle either of the power door lock switches.

Does the scan tool indicate an output to the failing door lock?

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Go to Step 3

Go to Step 4

3

Replace the malfunctioning door lock actuator.

Refer to Door Lock Actuator Replacement .

Is the repair complete?

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Go to Power Door Locks System Check

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4

Replace the door module associated with the failing door lock.

Refer to one of the following procedures:

Is the repair complete?

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Go to Power Door Locks System Check

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