For the 2011 Buick LaCrosse, headlight bulb fitment varies by the installed headlight system. The listed low-beam options are D1S and H11, while high-beam options are D1S and H9. Confirm the headlight type and existing bulb before ordering, since these are different applications.
- Fog lights use either H11 LED or H16 LED.
- Daytime running light fitment depends on the headlights: H11 LED or H16 LED with halogen headlights, and 3157 with HID headlights.
- Front and rear turn signals, parking lights, and front side markers use 3757A.
- Reverse lights use 921; tail, brake, center-stop, and rear side-marker lights are listed as LED.
- Interior and convenience lighting includes 2825, 98, 194, 7441, and 7065 depending on location.