When doing replacement or upgrading on 1964 – 1972 Buick Sportwagon, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight1964 – 1972 H5006
High Beam Headlight1964 – 1972 H5001
Back Up Light1964 – 1972 1156
Brake1964 – 1972 1157
Dome Light1968 1004
1971 194
1964 – 1967, 1969 – 1970 211-2
1972 212-2
Front Side Marker1972 194
1968 – 1970 194NA
1971 97
Front Turn Signal1964 – 1972 1157
License Plate1964 1155
1965 – 1972 97
Parking Light1964 – 1972 1157
Rear Side Marker1971 1157
1968 – 1970, 1972 194
Rear Turn Signal1964 – 1972 1157
Tail Light1964 – 1972 1157
Courtesy1971 194
1964 – 1970, 1972 90
Engine Compartment Light1972 1004
1964 – 1970 89
Glove Box1964 – 1970, 1972 1893
Map Light1971 194
1972 578
1964 – 1970 89
Radio Display1972 1893
Trunk1971 194
1964 – 1970, 1972 89