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 2007~ 2011 Cadillac DTS; 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: 9055
- Front turn signal light ( blinker light ): 5702AK / 3157 / 4157NA / 3157-SCK
- Daytime running light ( DRL ): 5702AK / 3157 / 4157NA / 3157-SCK / 3157K
- Cornering light bulb: 3157KX / 3157-SCK
- Rear turn signal light : LED
- Brake Light / Tail Light: LED
- Back-up reverse light: led
- License plate light / Tag light: 194
- Parking light: 2825
- Interior Map light: 578
- Glove box light: 194
- Interior door light: 214-2
- 3rd Brake light/ Center high mount stop light: LED
- Front side marker light & Rear side marker light: LED
- Trunk / Cargo Area light: 211-2
- Stepwell light: 194
- Vanity mirror light: 37
- Interior door light: 175
