Cadillac CTS Bulb Size by Year
The 2014-2019 Cadillac CTS has factory LED headlights, so there is no headlight bulb to replace. 2008-2013 models use an H11 low beam and an H9 high beam, and earlier years are in the table below.
Headlight bulbs by model year
| Model years | Low beam | High beam | Fog | Buy |
|---|---|---|---|---|
| 2014-2019 | LED | LED | H11 | |
| 2008-2013 | H11 | H9 | H11 | Shop H11 |
| 2003-2007 | 9006 | 9005 | 9145 | Shop 9006 |
LED means the headlight is a sealed LED unit from the factory, so there is no bulb to buy. Some trims differ from the base car, so check the bulb you are removing. Shop links go to Amazon, and we may earn a commission at no extra cost to you. Open your exact year below for every bulb position and sources.
Every CTS year
Sources. The bulb code for 17 of 17 model years is checked against a cited source, most often Diode Dynamics - OEM HID for 2014-2019 Cadillac CTS Sedan (D3S), AUXITO - Cadillac CTS Bulb Size Guide and Diode Dynamics - Low Beam for 2008-2014 Cadillac CTS (H11). Each year page lists its own sources.
Last verified 2026-06-19. Maintained by Matan B., who runs GarageDex. How we verify.