When doing replacement or upgrading on 2012 – 2017 Buick Verano, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight 2012 – 2017 H11
High Beam Headlight 2012 – 2017 H9
Front Fog Light 2012 – 2017 H8/H11/H16
Back Up Light 2012 – 2017 921
Brake 2012 – 2017 7443
Dome Light 2012 – 2017 194
Front Side Marker 2012 – 2017 7444NA
Front Turn Signal 2012 – 2017 7443NA
License Plate 2012 – 2017 12961
Parking Light 2012 – 2017 7444NA
Rear Side Marker 2012 – 2017 7443
Rear Turn Signal 2012 – 2017 H21W
Courtesy 2012 – 2017 12961
Inner Tail Light 2012 – 2017 194
Map Light 2012 – 2017 12961
Outer Tail Light 2012 – 2017 7443