When upgrading the stock halogen / incandescent lamps to led lighting bulbs, the bulb size guide will be much helpful, below are the bulb size guide for 2013~2017 Cadillac XTS; yet it is for reference only, it is suggested to check the owner manual to confirm the bulb size guide is correct before purchasing.
- High Beam Headlight : D1S; Low Beam headlight: D3S
- Daytime running light ( DRL ) : LED
- Front turn signal light (blinker light) / Parking light: 7444NA / 7443-SCK
- Rear turn signal light / Brake light / Tail light: L2200R-4C
- Back-up reverse light: 921
- License plate light / Tag light: 2825 / 2825L
- Interior Dome light: 2886X
- Interior Trunk / Cargo area light : 175
- 3rd Brake light/ Center high mount stop light: LED
- Front side marker light: 194 ; for rear side marker light: LED
- Interior Door light: 2825
- Vanity mirror light: 7065
Vehicles includes: 2013, 2014, 2015, 2016, 2017 Cadillac XTS
