GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Remove the key from the ignition key lock cylinder.
  2. Close all of the vehicle doors.
  3. Observe the door locks while you press LOCK and UNLOCK on the driver door lock switch.
  4. Observe the door locks while you press LOCK and UNLOCK on the passenger door lock switch.

All of the doors lock and unlock when you use either door lock switch.

    • Power Door Locks Operate From One Door Lock Switch Only. Go to Automatic Door Locks Inoperative with One Switch .
    • Lock Function Inoperative From Both Door Lock Switches. Go to Automatic Door Locks - Lock Inoperative .
    • Unlock Function Inoperative From Both Door Lock Switches. Go to Automatic Door Locks - Unlock Inoperative .
    • Lock Function Inoperative From One Door Lock Switch. Go to Automatic Door Locks - Lock Inop with One Switch.
    • Unlock Function Inoperative From One Door Lock Switch. Go to Automatic Door Locks - Unlock Inoperative with One Switch .
    • Door Lock Actuator Motor is Inoperative. Go to Power Door Locks Actuator Motor Inoperative .
    • Power Door Lock Completely Inoperative. Go to Automatic Door Locks Inoperative .

2

Lockout prevention feature:

  1. Turn the ignition switch to RUN.
  2. Open the left front and the right front door windows.
  3. Insert the key in the ignition key lock cylinder.
  4. Leave the ignition switch in LOCK.
  5. Open the driver door.
  6. Observe the door locks while you momentarily press LOCK on the door lock switch.
  7. Close the driver door.
  8. Open the left sliding door. If not equipped, go to step 10.
  9. Observe the door locks while you reach through the driver door window and momentarily press LOCK on the door lock switch.
  10. Open the right front door.
  11. Observe the door locks while you momentarily press LOCK on the door lock switch.
  12. Close the right front door.
  13. Open the right sliding door.
  14. Observe the door locks while you reach through the right front window and momentarily press LOCK on the door lock switch.

The doors do not lock when you press LOCK on either door lock switch while the key is in the ignition and a door is open.

Lockout Prevention Feature Inoperative. Go to Power Door Locks Inoperative - Lockout Feature .

3

Lockout protection override feature:

  1. Open the driver door.
  2. Fully insert the key in the ignition key lock cylinder.
  3. Leave the ignition switch in LOCK.
  4. Observe the door locks while you press and hold the driver door lock switch for 3 seconds.
  5. Use the driver door lock switch in order to unlock the doors.
  6. Close the driver door.
  7. Open the right front door.
  8. Observe the door locks while you press the passenger door lock switch twice.
    • All of the doors lock after you hold the driver door lock switch for 3 seconds while the key is in the ignition.
    • All of the doors lock after you press the passenger door lock switch for 3 seconds while the key is in the ignition.

Lockout Prevention Override Feature Inoperative. Go to Power Door Locks Lockout Override Mode Inoperative .

4

The ignition OFF unlock feature:

  1. Set the automatic door locks feature customization to mode 3. Refer to Automatic Door Lock Feature Customization .
  2. Start the engine.
  3. Step on and firmly hold the brake pedal.
  4. Shift the transaxle out of PARK.
  5. Shift the transaxle into PARK.
  6. Observe the door locks while you turn the ignition switch to LOCK.

All of the doors unlock when you turn the ignition switch to LOCK.

Automatic Door Lock Feature Inoperative. Go to Automatic Door Locks Inoperative, Power Locks Operate .

5

Shift into PARK unlock and shift out of PARK lock features:

  1. Set the automatic door locks feature customization to mode 4.
  2. Close all of the vehicle doors.
  3. Ensure that all of the doors are unlocked.
  4. Step on and firmly hold the brake pedal.
  5. Start the engine.
  6. Observe the door locks while you shift the transaxle into PARK.
  7. Turn OFF the engine.
    • All of the doors lock when you shift the transaxle out of PARK.
    • All of the doors unlock when you shift the transaxle into PARK.

Automatic Door Lock Feature Inoperative. Go to Automatic Door Locks Inoperative, Power Locks Operate .

6

Last door lock feature:

  1. Set the locking control feature customization to mode 4.
  2. Turn the ignition switch to RUN.
  3. Open all of the vehicle windows.
  4. Turn the ignition switch to LOCK and remove the key from the ignition key lock cylinder.
  5. Step out of the vehicle.
  6. Ensure that all of the passenger doors are closed, except the driver door.
  7. Press LOCK on the driver door lock switch. Listen for 3 chimes.
  8. Close the driver door.
  9. Within 5 seconds, open the left sliding door. Listen for 3 chimes. If not equipped with a left sliding door, go to step 12.
  10. Close the left rear door.
  11. Wait 5 seconds while you observe the door locks.
  12. Unlock and open the right front door.
  13. Press LOCK on the door lock switch. Listen for 3 chimes.
  14. Close the right front door.
  15. Within 5 seconds, open the right sliding door. Listen for 3 chimes.
  16. Close the right front door.
  17. Wait 5 seconds while you observe the door locks.

All of the doors lock 5 seconds after the last door is closed when you press LOCK on either door lock switch and no key is inserted in the ignition key lock cylinder.

Last Door Lock or Sliding Door Delayed Locking Feature Inoperative. Go to Automatic Door Lock Last Door Lock Mode Inoperative .

7

Sliding door delayed locking:

  1. Open the left or the right sliding door.
  2. Ensure that the right front door and the liftgate door are closed.
  3. Remove the key from the ignition key lock cylinder.
  4. Press LOCK on either door lock switch.
  5. Close the driver door.
  6. Close the sliding door.
  7. Wait 3 seconds while you observe the door locks.

All of the doors lock 2.7-3.3 seconds after you close the sliding door.

Last Door Lock or Sliding Door Delayed Locking Feature Inoperative. Go to Automatic Door Lock Last Door Lock Mode Inoperative .

8

Key cylinder unlock feature:

  1. Remove the key from the ignition key lock cylinder.
  2. Lock and close all of the doors.
  3. Insert the key into one of the following door key cylinder locks:
  4. • Left front
    • Right front
    • Liftgate
  5. Rotate the key in order to unlock the door. While you observe the locks, old the key in the unlock position for 1 second.

All of the doors unlock when you rotate the following door key cylinders to UNLOCK for 1 second:

    • Left front
    • Right front
    • Liftgate

Key Cylinder Unlock Feature Inoperative. Go to Automatic Door Locks Inoperative - Unlock with Key Lock .

9

  1. Remove the key from the ignition key lock cylinder.
  2. Unlock and close all of the vehicle doors.
  3. Insert the key into one of the following door key lock cylinders:
  4. • Left front
    • Right front
    • Liftgate
  5. Observe the door locks while you rotate the key in order to lock the door.

All of the doors lock when you rotate any of the following door key lock cylinders to LOCK:

    • Left front
    • Right front
    • Liftgate

Key Cylinder Lock Feature Inoperative. Go to Power Door Locks Key Cylinder Lock Feature Inoperative .

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.