When doing replacement or upgrading on 1958 – 1969 Buick Special, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight 1958, 1961 – 1969 H5006
High Beam Headlight 1958, 1961 – 1969 H5001
Back Up Light 1958, 1961 – 1969 1156
Brake 1962 – 1963 1034
1958, 1961, 1964 – 1969 1157
Dome Light 1958, 1963, 1968 1004
1964 – 1967, 1969 211-2
1961 – 1962 578
Front Side Marker 1968 – 1969 194NA
Front Turn Signal 1958, 1961 – 1969 1157
License Plate 1964 1155
1958, 1961 – 1963 67
1965 – 1969 97
Parking Light 1958, 1961 – 1969 1157
Rear Side Marker 1968 – 1969 194
Rear Turn Signal 1958, 1961, 1963 1034
1962, 1964 – 1969 1157
Tail Light 1958, 1961 – 1963 1034
1964 – 1969 1157
Courtesy 1961 68
1962 – 1969 90
Engine Compartment Light 1963 – 1969 89
1962 90
Glove Box 1962 – 1963 1816
1964 – 1969 1893
1961 57
Map Light 1963 – 1969 89
1958, 1962 90
Radio Display 1958 1891
1962 – 1963 1893
Trunk 1958, 1961, 1963 – 1969 89
1962 90