2018 Cadillac CT6 Bulb Sizes
Quick answer: here is every bulb size for the 2018 Cadillac CT6, position by position.
2018 Cadillac CT6 bulb size chart
| Position | Bulb size (tap to shop) |
|---|---|
| Back Up Reverse Light Bulb | 921 |
| Trunk or Cargo Area Light | 194 |
Tap any bulb size to see it on Amazon. Trims and mid-year changes can differ, so pull the old bulb and match the number on its base before you order.
Which bulb should I buy?
- Just need it working again? Buy the standard halogen in the same size. It's cheap, it's legal everywhere, and it takes five minutes.
- Want to see better at night without messing with anything? Step up to a brighter halogen. Same plug, more light, no wiring.
- Want the white, modern look? Go LED. Great for fog, reverse, plate and interior lights. For headlights, LED bulbs in a housing built for halogen can throw glare, so aim them after you install and check your state's rules before running them on the street.
Our picks by bulb size
921 (back up reverse light)
- Halogen: Sylvania 921 Long Life (2 bulbs)
- LED: LASFIT 921 LED (pack of 2)
194 (trunk or cargo area light)
- Halogen: Sylvania 194 SilverStar (2 bulbs)
- LED: LASFIT 194 LED (2 pcs)
For brake lights and turn signals, match the LED color to the lens: red behind a red lens, amber for turn signals.
While you're in there
- Cloudy headlights? New bulbs won't fix a yellowed lens. A replacement housing makes a bigger difference than any bulb: see Cadillac CT6 headlights at NTXGlow.
- Tail lights faded or cracked? Cadillac CT6 tail lights at NTXGlow.
Common questions
Can I put LED bulbs in a 2018 Cadillac CT6?
Most sizes on this vehicle have a plug-in LED version. Fog, license plate and interior lights are the easy wins. For headlights, aim them after you install and check your local laws first.
How do I make sure I'm buying the right size?
Pull the old bulb and read the number stamped on its base, or check the bulb chart in your owner's manual. Trims and mid-year changes can differ from any chart, including this one.
Other Cadillac CT6 years
2016 Cadillac CT6 bulb sizes · 2017 Cadillac CT6 bulb sizes · 2019 Cadillac CT6 bulb sizes
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