When doing replacement or upgrading on 2006 – 2011 Buick Lucerne, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight2006 – 2011 9006
High Beam Headlight2006 – 2011 9005
Front Fog Light2006 – 2011 H8/H11/H16
Back Up Light2006 – 2011 921
Brake2006 – 2011 3057
Daytime Running Light2006 – 2011 9006
Front Side Marker2006 – 2011 194
Front Turn Signal2006 – 2011 4157
License Plate2006 – 2011 194
Parking Light2006 – 2011 4157
Rear Side Marker2006 – 2011 194
Rear Turn Signal2006 – 2011 3057
Glove Box2006 – 2011 194
Inner Tail Light2006 – 2011 194
Outer Tail Light2006 – 2011 3057
Trunk2006 – 2011 211-2