When doing replacement or upgrading on 1965 – 1967 Buick Gran Sport, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

• Buick Gran Sport Bulb Size Guide

1965 – 1967 Buick Gran Sport Bulb Size Guide
Low Beam Headlight	1965 – 1967	H5006
High Beam Headlight	1965 – 1967	H5001
Back Up Light	1965 – 1967	1156
Brake	1965 – 1967	1157
Dome Light	1965 – 1967	211-2
Front Turn Signal	1965 – 1967	1157
License Plate	1965 – 1967	97
Parking Light	1965 – 1967	1157
Rear Turn Signal	1965 – 1967	1157
Tail Light	1965 – 1967	1157
Courtesy	1965 – 1967	90
Engine Compartment Light	1965 – 1967	89
Glove Box	1965 – 1967	1893
Map Light	1965 – 1967	89
Trunk	1965 – 1967	89