Used for: Back Up Reverse Light Bulb
Used for: Trunk or Cargo Area Light
Used for: Trunk or Cargo Area Light
Used for: Vanity Mirror Light Bulb
This page helps you verify the bulb sizes for the 2019 Cadillac CT6 by lighting position, so you can match the correct replacement before you buy. The CT6 uses a mostly LED lighting setup, but a few interior and reverse light positions still use replaceable bulb types, which makes it important to confirm each location separately.
Use this guide as a quick reference for the front, rear, and interior lighting on your 2019 Cadillac CT6. Because trim level, lighting package, market, and body style can change the exact fitment, checking the bulb chart by position is the safest way to avoid ordering the wrong part.
For the 2019 Cadillac CT6, fitment can vary between trims and lighting packages, especially when comparing factory LED equipment with any aftermarket conversions. Some exterior lamps are integrated LED assemblies rather than traditional replaceable bulbs, while other locations such as the back up reverse light, trunk or cargo area light, and vanity mirror light may still use specific bulb types. Before purchasing, it is smart to inspect the bulb already installed in the vehicle and compare it with the chart, since the same model year can have different setups depending on market and configuration.
The bulb chart for the 2019 Cadillac CT6 lists the headlight high beam and low beam as LED. In many cases this means the headlamp is an LED unit rather than a simple replaceable halogen bulb.
The brake light bulb position is listed as LED. On this car, that usually points to an LED light source or LED assembly, so replacement may not be a standard bulb swap like older vehicles.
The front turn signal light is listed as LED for the 2019 Cadillac CT6. That means the front signal lighting is typically part of an LED setup rather than a conventional removable bulb.
The rear turn signal light bulb is listed as LED on the 2019 Cadillac CT6. As with the other exterior LED positions, the exact replacement method can depend on the lamp design and trim.
The back up reverse light bulb is listed as 921. This is one of the few positions on the 2019 CT6 that uses a conventional replaceable bulb size.
The trunk or cargo area light is listed with 194 and 7441 bulb options. Check the installed bulb before buying, since either size may be used depending on the vehicle configuration.
The vanity mirror light bulb is listed as 6612F, and it is marked optional in the bulb chart. That means some vehicles may have a different setup or may not use this bulb in the same way.
Yes. The parking light bulb and the daytime running light bulb are both listed as LED for the 2019 Cadillac CT6. These are typically integrated lighting functions rather than standard bulb replacements.
Both the front side marker light bulb and rear side marker light bulb are listed as LED on the 2019 Cadillac CT6. That usually means the side markers are part of an LED lamp assembly.
Yes, the license plate light bulb is listed as LED. If you are replacing the license plate lighting, verify whether your vehicle uses a serviceable LED module or a complete lamp assembly.
Yes. Trim, lighting package, body style, and market can all affect fitment on the 2019 Cadillac CT6. Always confirm the bulb position and compare it with the installed part before ordering.
If your CT6 already uses factory LEDs in most exterior positions, aftermarket conversions are usually only relevant for the replaceable bulb locations. Make sure any conversion matches the socket, polarity, and housing design, and check for compatibility issues before installing.
