3 Years Available
Cadillac Ct6 Light Bulb Sizes
Complete bulb size reference for the Cadillac Ct6 from 2016 to 2018. Find headlight, fog light, turn signal, and brake light bulb sizes for every model year.
Every Cadillac ct6 from 2016 to 2018 uses the same LED Headlights low beam bulb — once you confirm your year is within this range, you only need one part number.
Year Range
2016 – 2018
3 model yearsBulb Sizes Across Years
| Position | Bulb Type(s) | Years | Status |
|---|---|---|---|
| Low Beam | LED Headlights(2016–2018) | 3 years | Consistent |
| High Beam | LED Headlights(2016–2018) | 3 years | Consistent |
| Fog Light | LED Fog Light(2016–2018) | 3 years | Consistent |
| Brake Light | LED Bulb(2016–2018) | 3 years | Consistent |
| Side Marker | LED Bulb(2016–2018) | 3 years | Consistent |
| Turn Signal Front | LED Bulb(2016–2018) | 3 years | Consistent |
| Turn Signal Rear | LED Bulb(2016–2018) | 3 years | Consistent |
| License Plate | LED Bulb(2016–2018) | 3 years | Consistent |
| Parking Light | LED Bulb(2016–2018) | 3 years | Consistent |
| Reverse Light | 921(2016–2018) | 3 years | Consistent |
| Trunk Light | 175(2016–2018) | 3 years | Consistent |
Common Ct6 Replacement Parts
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Frequently Asked Questions
We have bulb size data for the Cadillac Ct6 from 2016 to 2018, covering 3 model years. Select your year below for a complete position-by-position bulb chart.
No, the Cadillac Ct6 has used the LED Headlights low beam bulb consistently across all 3 model years in our database. Any year in the 2016–2018 range uses the same bulb.
The Cadillac Ct6 uses a LED Headlights bulb for the low beam (same bulb serves both high and low beam via dual filament), and a LED Fog Light for the fog lights. Select your year below for the exact fitment chart.
Yes. The Cadillac Ct6 uses a LED Headlights low beam, and direct-fit LED conversion kits for that size are widely available. LED upgrades typically produce 2–3× more light output than stock halogen and last 25,000+ hours. Look for a DOT-compliant kit with a proper beam cutoff pattern.
Select your model year from the list below. Each year page shows every bulb position — low beam, high beam, fog light, turn signal, and brake light — with the correct size and a link to buy it on Amazon.