Cadillac XT4 Bulb Size by Year
The 2019-2025 Cadillac XT4 uses a 9012 low beam and a 9012 high beam.
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Headlight bulbs by model year
| Model years | Low beam | High beam | Fog | Buy |
|---|---|---|---|---|
| 2019-2025 | 9012 | 9012 | - | Shop 9012 |
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 XT4 year
2025 Cadillac XT49012/90122024 Cadillac XT49012/90122023 Cadillac XT49012/90122022 Cadillac XT49012/90122021 Cadillac XT49012/90122020 Cadillac XT49012/90122019 Cadillac XT49012/9012
Sources. The bulb code for 0 of 7 model years is checked against a cited source, most often bulbcharts.com - Cadillac XT4 Bulb Guide and Cadillac Owners Forum - changing a halogen headlight bulb (XT4 9012). Each year page lists its own sources.
Last verified 2026-06-19. Maintained by Matan B., who runs GarageDex. How we verify.