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How do you Change, Replace, or Install Broken 2003-2007 Cadillac CTS Tail Light Replacement

Fits Years: 2004, 2005, 2006, 2007
Click here to see all Cadillac CTS Tail Lights for sale


Tools required:
  • 10mm socket/ratchet


Step 1: Open the vehicle's trunk.

Step 2: Loosen and remove the spare-tire cover bolt (it's a large hand bolt in the center of your trunk's floor).

Step 3: Remove the four hand bolts that hold the trim panel in place. Remove the panel.

Step 4: Remove the hand bolt on the side of the vehicle in which you are replacing the tail light assembly.

Step 5: Remove the insulation.

Step 6: Disconnect the wiring harness from the back of the tail light assembly.

Step 7: Remove the two 10mm retaining bolts that secure the tail light assembly in place.

Step 8: You can now remove the tail light assembly from the vehicle.

Step 9: Insert your new tail light assembly into the chassis.


Be sure to feed the wiring through the right openings, and use the alignment tabs to ensure perfect installation.

Step 10: Connect the wiring harness to the back of the new tail light assembly.

Step 11: Secure the tail light assembly by tightening the two 10mm retaining bolts.

Step 14: Re-insert the insulation

Step 15: Tighten all of the hand bolts to secure the trunk liner and trim panel.




Please Note

While we are more than happy to create these installation guides for your benefit, we cannot maintain any liability regarding the part, or the driving experience, once the part has been replaced/installed. We always guarantee the quality of the parts we provide, but the installation liability rests solely on the installer.

And, though we are always here to answer your questions, please note that our technicians created these guides for your convenience, and cannot provide assistance beyond this guide.


If you're looking for a good deal on the parts mentioned in this instructional guide, be sure to check these out:

04-07 Cadillac CTS Tail Light Rear Lamp
Driver Side (2006 2005 2004 2003)

From 1-4-04
$148.95
04-07 Cadillac CTS Tail Light Rear Lamp
Passenger Side

From 1-4-04
$148.95

These Part Change / Installation Instructions Apply to
07 2007, 06 2006, 05 2005, 04 2004 Cadillac CTS Tail Light Replacement Instructions
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