GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 DeVille 🢒 Body and Accessories 🢒 Doors 🢒 Door Lock Replacement

Removal Procedure

Caution: This vehicle is equipped with a Supplemental Inflatable Restraint (SIR) System. Failure to follow the correct procedure could cause the following conditions:

   • Air bag deployment
   • Personal injury
   • Unnecessary SIR system repairs
In order to avoid the above conditions, observe the following guidelines:
   • Refer to SIR Component Views in order to determine if you are performing service on or near the SIR components or the SIR wiring.
   • If you are performing service on or near the SIR components or the SIR wiring, disable the SIR system. Refer to Disabling the SIR System.

Caution: In order to prevent SIR deployment, personal injury, or unnecessary SIR system repairs, do not strike the door or the door pillar in the area of the side impact sensor (SIS). Turn OFF the ignition and remove the key when performing service in the area of the SIS.


    Object Number: 319920 Size: SH
  1. Disable the SIR system. Refer to Disabling the SIR System .
  2. Remove the trim panel. Refer to one of the following procedures:
    3. •  Door Trim Panel Replacement
    •  Front Side Door Trim Panel Replacement
    •  Rear Side Door Trim Panel Replacement .
  3. Remove the water deflector. Refer to Door Water Deflector Replacement .
  4. Remove the lock rod shield (1) from the module.

    5. Object Number: 319920 Size: SH
  5. Remove the lock rods (3) from the lock.
  6. Disconnect the electrical connectors.
  7. Remove the 3 fasteners.
  8. Remove the lock assembly.

Installation Procedure

    Object Number: 319873 Size: SH
  1. Install the lock assembly (1) to the door.

    2. Notice: 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.

  2. Install the 3 fasteners.

    3. Tighten
    Tighten the fasteners to 7 N·m (62 lb in).

  3. Connect the electrical connectors.
  4. Install the lock rods (3).
  5. Install the lock rod shield (2).
  6. Ensure that the lock rod shield is in position and is secured to the guide slot (3).
  7. Install the water deflector. Refer to Door Water Deflector Replacement .
  8. Enable the SIR system. Refer to Enabling the SIR System .
  9. Install the trim panel. Refer to one of the following procedures:
    10. •  Door Trim Panel Replacement
    •  Front Side Door Trim Panel Replacement
    •  Rear Side Door Trim Panel Replacement .