2026 Cadillac CT4 Light Bulbs User Guide
Modern LED lighting is a characteristic of the 2026 Cadillac CT4 that improves safety, style, and visibility. Its cutting-edge fog lights, headlamps, and taillights provide clear illumination and recognizable Cadillac distinctive lighting. These LEDs enhance performance and go well with the CT4’s elegant style. They are long-lasting and energy-efficient.
Cadillac Headlight Aiming Guide
Front Headlight Aiming
Headlight aim has been preset and should need no further adjustment.
If the vehicle is damaged in a crash, the headlight aim may be affected. If adjustment to the headlights is necessary, see your dealer.
Bulb Replacement
Caution
Do not replace incandescent bulbs with aftermarket LED replacement bulbs. This can cause damage to the vehicle electrical system.
For the proper type of replacement bulbs, or any bulb changing procedure not listed in this section, contact your dealer.
Halogen Bulbs
Warning
Halogen bulbs have pressurized gas inside and can burst if you drop or scratch the bulb. You or others could be injured. Be sure to read and follow the instructions on the bulb package.
High Intensity Discharge (HID) Lighting
Warning
The High Intensity Discharge (HID) lighting system operates at a very high voltage. If you try to service any of the system components, you could be seriously injured. Have your dealer or a qualified technician service them.
After an HID headlight bulb has been replaced, the beam might be a slightly different shade than it was originally. This is normal.
LED Lighting
Caution
Do not replace incandescent bulbs with aftermarket LED replacement bulbs. This can cause damage to the vehicle electrical system.
This vehicle may be equipped with incandescent bulbs and LED lights. For replacement of any LED lighting assembly, contact your dealer.
Front Turn Signal Lights
Uplevel
See your dealer for turn signal replacement.
Base level
To replace one of these lights:
- Open the hood.
- If your vehicle is equipped with a beauty cover, remove the beauty cover to get access to the bulb.
- Turn the bulb socket counterclockwise to remove it from the headlight assembly.
- Unplug the electrical connector from the bulb by releasing the clip on the connector.
- Replace the bulb and reverse Steps 1–4 to reinstall.
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2024 Cadillac CT4 V-SERIES Specs, Price, Features, Mileage and Review