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 2004~2009 Cadillac XLR; 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: D1S
- Fog light for 2004~2008 Cadillac XLR: 9045; FOR 2009 Cadillac XLR: H11 / H11LL
- Daytime running light ( DRL ) for 2005~2009 Cadillac STS: 3757A / 3757AK / 3157-SCK
- Front turn signal light (blinker light) / Parking light: 3757A / 3757AK / 3157-SCK;
- Rear turn signal light: LED
- Brake light / Tail light: LED
- Back-up reverse light: 3156
- License plate light / Tag light: 2825 / 2825L
- Parking light: 2825
- Interior Map light : 212-2
- Interior Trunk / Cargo area light : PC168
- 3rd Brake light/ Center high mount stop light: LED
- Front side marker light: 2825 ; for rear side marker light: LED
Vehicles includes: 2004, 2005, 2006, 2007, 2008, 2009 Cadillac XLR
