2016 Cadillac CTS-V bulb fitment starts with D3S bulbs for both the low-beam and high-beam headlights. The supplied fitment data does not identify a projector or non-projector headlight variation, so verify the existing bulb and housing before ordering.
For other lighting, the reverse lights use 921 bulbs, while the license plate and dome lights use 2825 bulbs. Interior and convenience-light fitments include 2886X for the step light, 906 for the glove box and interior light, PC175 for the map light, 211-2 for the trunk, and 6612F for the vanity light.
- Low beam: D3S
- High beam: D3S
- Reverse light: 921
- License plate and dome: 2825
- Map, trunk, and vanity: PC175, 211-2, and 6612F
No fog-light or front turn-signal bulb fitment is listed in the supplied data.