How to Replace Door Lock Cylinder 03-07 Cadillac CTS
Difficulty: Intermediate · About 60 min · Cadillac Cts
Replace the exterior door lock cylinder on a 2003–2007 Cadillac CTS, releasing the door panel and water shield to transfer the cylinder and reconnect its latch rod.
Tools you will need
- Socket Extensions
- Flat Blade Screwdriver
- Phillips Head Screwdriver
- 10mm Socket
- Ratchet
Parts and supplies
- Exterior door lock cylinder
Steps
Remove the door panel
Release the handle and lock trim, unplug the lock wiring, and remove the pull screws. Roll the window fully up, release the panel sides, and lift the panel away from the door.
Disconnect the inner handle and water shield
Remove the interior handle bolts and rotate the handle off its latch rod. Peel back the water shield and release the door rod retainer to expose the lock cylinder.
Remove the lock cylinder
Release the snap ring that retains the cylinder in the exterior handle. Slide the cylinder out carefully and detach it from the lock rod.
Install the replacement cylinder
Connect the latch rod to the replacement cylinder and seat it in the exterior handle. Reinstall its retaining clip and rod retainer, then press the water shield back into place.
Reassemble and test the lock
Reinstall the interior handle and door panel, reconnecting the lock wiring and latch rod. Secure the trim and screws, then test the key cylinder, lock, and inside handle.
Check your vehicle’s repair manual for exact specifications and fit.