How to Replace Daytime Running Bulb 03-07 Cadillac CTS
Difficulty: Beginner · About 25 min · Cadillac Cts
Replace the daytime running light bulb on a 2003–2007 Cadillac CTS by opening the lower bumper cover, disconnecting the lamp, and securing the clips after the repair.
Tools you will need
- Flat blade screwdriver
- Flashlight
Parts and supplies
- Daytime running light bulb
Steps
- Open the lower bumper cover
Remove the three push clips under the bumper cover. Lift each clip's center pin first, then release the clip body and fold the plastic cover back enough to reach the lamp.
- Remove the old bulb
Disconnect the bulb from its wiring harness and release it from the lamp housing. Inspect the socket and connector for heat damage before installing a replacement.
- Install the new bulb
Connect the replacement bulb to the harness and fit it into its housing. Make sure the connector is fully engaged and the bulb is seated in the correct orientation.
- Secure the cover and test
Return the lower plastic cover to position and reinstall each push clip, pressing the center pins flush. Turn on the daytime running lights and confirm the lamp works.
Check your vehicle’s repair manual for exact specifications and fit.