Installation Procedure

WARNING: This page is about a different car, the 2018 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

If replacing with a NEW lock cylinder, the new lock cylinder must be coded. Refer to Front Side Door Lock Cylinder Coding (Non Free Wheeling)Front Side Door Lock Cylinder Coding .
Courtesy of GENERAL MOTORS COMPANY

NOTE:
Ensure that the door lock cylinder is engage all the way into the side door handle locator tabs. Insert the key into the door lock cylinder, turn left to right checking for binding before install the assembly to the vehicle.

Install the lock cylinder retainer (1) to the front side door outside handle bracket assembly (3).
Install the door lock cylinder (2) in the front side door outside handle bracket, push forward locking the lock cylinder (2) into the lock cylinder retainer.
Courtesy of GENERAL MOTORS COMPANY

Connect the door lock cylinder rod (1) to the lock cylinder.
Install the front side door latch and handle bracket assembly as one in the vehicle. Refer to Front Side Door Latch Replacement .
Ensure that the door lock system operates properly before installing the trim.