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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

All Cadillac CTS Tail Lights for sale

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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.
These Part Change / Installation Instructions Apply to:

04 2004, 05 2005, 06 2006, 07 2007 Cadillac CTS Tail Lights Replacement Instructions

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