For 1990-2009 cars

## Door Lock Cylinder Replacement Buick

### Removal Procedure

Important: Ensure that the window is in the full up position.

1. Remove the door trim panel. Refer to Front Side Door Trim Panel Replacement .
2. Remove the water deflector. Refer to Door Water Deflector Replacement .
3. Tape the window to the header.
4. Remove the window sash nuts.
5. Remove the window from the regulator.
6. Carefully lower the regulator to allow access to the outside door handle.

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

7. Disconnect the negative battery cable.
8. Disconnect any wire harness (4) that is present.
9. Remove the three screws from the lock assembly (if applicable).
10. Disconnect the locking rod retainer.
11. Remove the locking rod (3).
12. Remove the lock nut or the retainer (1).
13. Remove the cylinder (2).

### Installation Procedure

1. Install the gasket over the cylinder (2), (if supplied).
2. Install the cylinder (2), including any wire harnesses (4) that may be attached.
3. Install the lock cylinder nut or retainer (1).
4. Connect any wire harness (4), if disconnected.
5. Install the lock rod (3) to the lock assembly.
6. Install a new lock rod retainer clip if the original clip was damaged or broken.
7. Install the three screws to the lock assembly (if applicable).
8. Connect the negative battery cable.
9. Raise the window regulator in order to install the window.
10. Install the window to the regulator.
11. Install the window sash nuts.
12. Remove the tape that is securing the window.
13. Adjust the window. Refer to Front Side Door Window Adjustment .
14. Install the water deflector. Refer to Door Water Deflector Replacement .
15. Install the door trim panel. Refer to Front Side Door Trim Panel Replacement .
16. Verify the door lock operation.

## Door Lock Cylinder Replacement Oldsmobile/Pontiac

### Removal Procedure

1. Remove the outside handle assembly (5). Refer to Door Outside Handle Replacement .
2. Disconnect any wire harness that is present.
3. Remove the following components:

• | The nut (2)

• | The retainer

4. Remove the cylinder (4).

### Installation Procedure

1. Install the gasket over the cylinder (4).
2. Install the cylinder (4), including any wire harness that may be attached.
3. Install the following components:

• | The retainer

• | The nut (2)

4. Install the outside door handle assembly (5). Refer to Door Outside Handle Replacement .