Century, Grand Prix, Impala, Intrigue, Lumina, Monte Carlo, Regal 2001-2005

Locks & Lock Systems

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Power Door Locks



Diagnosis & Testing

A short to ground in any door lock or unlock control circuit will most likely open the 15-amp DR LK/TRUNK fuse located in the instrument panel (I/P) fuse block and cause all door lock functions to become inoperative. However, if the lock or unlock control circuit is shorted to ground and the DR LK/TRUNK fuse does not open, the most likely affect will be that all door locks will be inoperative in one direction, i.e. if the unlock control circuit is shorted to ground, all doors may lock, but will not unlock, or, if the lock control circuit is shorted to ground, all doors may unlock, but will not lock.

Inspect for aftermarket devices which could affect the operation of the system. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. Faulty electrical connections or wiring may be the cause of intermittent conditions.

Removal & Installation
Door Lock Motor
  1. Remove the door trim panel.
  2.  
  3. Remove the door water deflector.
  4.  
  5. Open the outside handle rod to lock clip located on the door lock. The outside handle rods should be loose from the lock.
  6.  
  7. Remove the lock cylinder rod from the outside door handle.
  8.  
  9. Remove the inside door handle.
  10.  
  11. Remove the screws from door lock.
  12.  
  13. Remove the door lock and rods through the access hole in the door inner panel.

    Click image to see an enlarged view

    Fig. Disconnecting electrical connector (2) from the lock and removing the rods from the door lock

  14.  
  15. Disconnect the electrical connector from the lock by pulling out on the tab.
  16.  
  17. Remove the rods from the door lock.
  18.  
  19. Reverse removal procedure.
    CAUTION
    The outside handles have adjustable outside handle lock rods. This allows for adjustment of the amount of travel needed in order to operate the outside handle. When servicing a vehicle with adjustable outside handle lock rods, remove all free play between the outside handle and the lock. Also, do not operate the outside handle before these connections are made.

  20.  

Front
  1. Remove the front door water deflector.
  2.  
  3. Disconnect the front door inside handle rods.
  4.  
  5. Disconnect the front door inside handle rods from the front door inside rod block.
  6.  
  7. Disconnect the front door outside handle rods.
  8.  
  9. Remove the front door lock screws.
  10.  
  11. Remove the front door lock from inside the front door.

    Click image to see an enlarged view

    Fig. Removing the front door inside handle rods from the front door lock and disconnecting the front door lock electrical connectors-Front

  12.  
  13. Disconnect the front door lock electrical connectors.
  14.  
  15. Remove the front door inside handle rods from the front door lock.
    NOTE
    Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  16.  
  17. To install, reverse removal procedure.
  18.  
  19. Apply Locktite® Blue GM P/N 12345382, or Canadian P/N 10953489, or equivalent prior to installing the front door lock screws. Tighten to 89 inch lbs. (10 Nm).
  20.  

Rear
  1. Remove the rear door water deflector.
  2.  
  3. Disconnect the rear door outside handle rod from the rear door lock.
  4.  
  5. Disconnect the rear door inside handle rods.
  6.  
  7. Disconnect the rear door inside handle rods from the rear door inside rod block.
  8.  
  9. Remove the rear door lock screws.
  10.  
  11. Remove the rear door lock from the rear door.
  12.  
  13. Disconnect the rear door lock electrical connectors.

    Click image to see an enlarged view

    Fig. Removing the rear door inside handle rods from the rear door lock and disconnecting the front door lock electrical connectors-Rear

  14.  
  15. Remove the rear door inside handle rods from the rear door lock.
    NOTE
    Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  16.  
  17. To install, reverse removal procedure.
  18.  
  19. Apply Locktite® Blue GM P/N 12345382, or Canadian P/N 10953489, or equivalent prior to installing the front door lock screws. Tighten to 89 inch lbs. (10 Nm).
  20.  

  1. Remove the rear door outside handle.
  2.  
  3. Remove the interior trim panel.
  4.  
  5. Remove the water deflector.

    Click image to see an enlarged view

    Fig. Removing three front side door lock screws (1) and front door lock assembly (2)-rear door

  6.  
  7. Remove the three rear side door lock screws.
  8.  
  9. Release the inside handle cable retainers before removing the door lock.
  10.  
  11. Disconnect the door lock electrical connector.
  12.  
  13. Remove the door lock with the outside handle housing.
  14.  
  15. Transfer the handle and lock rods to the new door lock.
  16.  
  17. To install, reverse removal procedure.
  18.  

Door Lock Switch
  1. Remove the inside door handle bezel.
  2.  
  3. Remove the power door lock switch from the inside door handle bezel using a small, flat-bladed tool in order to release the retainers.

    Click image to see an enlarged view

    Fig. Disconnect the electrical connector from the power door lock switch

  4.  
  5. Disconnect the electrical connector from the power door lock switch.
  6.  
  7. To install, reverse removal procedure.
  8.  

 
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