When doing replacement or upgrading on 1961 – 1998 Buick Skylark, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight 1989 – 1991 9006
1986 – 1988 H4656
1961 – 1972 H5006
High Beam Headlight 1989 – 1991 9005
1986 – 1988 H4651
1961 – 1972 H5001
High Beam and Low Beam Headlight 1992 – 1998 9004
1975 – 1979 H6024
1980 – 1985 H6054
Back Up Light 1961 – 1972, 1975 – 1998 1156
Brake 1962 1034
1961, 1963 – 1972, 1975 – 1982 1157
1983 – 1991 2057
1992 – 1998 3057
Dome Light 1963, 1968 1004
1971 194
1964 – 1967, 1969 – 1970, 1975 211-2
1972 212-2
1976 – 1980, 1982 – 1986, 1988 561
1987, 1989 – 1998 562
1961 – 1962 578
Front Side Marker 1978 1157
1972, 1975 – 1977, 1979 – 1988, 1992 – 1998 194
1968 – 1970, 1989 – 1991 194NA
1971 97
Front Turn Signal 1961 – 1972, 1975 – 1982 1157
1983 – 1995 2057
1996 – 1998 3457
License Plate 1964 1155
1975 – 1977, 1979 – 1998 194
1961 – 1963 67
1965 – 1972, 1978 97
Parking Light 1961 – 1972, 1975 – 1982 1157
1990 – 1991 194NA
1983 – 1989, 1992 – 1995 2057NA
1996 – 1998 3457
Rear Side Marker 1971 1157
1968 – 1970, 1972, 1975 – 1998 194
Rear Turn Signal 1961, 1963 1034
1962, 1964 – 1972, 1975 – 1982 1157
1983 – 1991 2057
1992 – 1998 3057
Tail Light 1961 – 1963 1034
1964 – 1972, 1975 – 1982 1157
1983 – 1991 2057
1992 – 1998 3057
Center High Mount Stop Light 1986, 1988 – 1989, 1992 – 1998 1156
1987 912
Courtesy 1977 1445
1990 161
1979, 1992 – 1993 168
1971, 1989, 1994 – 1998 194
1975 561
1976 562
1978, 1980 631
1961 68
1985 73
1962 – 1970, 1972 90
1981 – 1984, 1986 – 1988, 1991 912
Engine Compartment Light 1975 – 1978 1003
1972 1004
1979 – 1980, 1982 – 1988 1156
1963 – 1970, 1990 – 1991 89
1962 90
1992 – 1996 906
Glove Box 1962 – 1963 1816
1980 1891
1964 – 1970, 1972, 1975 – 1976, 1978 – 1979 1893
1991 192
1981 – 1982, 1987, 1992 – 1998 194
1961 57
Map Light 1980, 1982 1004
1992 – 1998 168
1971 194
1983 – 1986 212-2
1987, 1989 – 1991 562
1972, 1988 578
1963 – 1970 89
1962 90
Radio Display 1962 – 1963, 1972, 1975 – 1976, 1978, 1985 – 1988 1893
1979 – 1981, 1983 – 1984 194
Trunk 1975 – 1976, 1979 – 1980, 1982 – 1988, 1990 – 1991 1003
1971 194
1992 – 1998 562
1961, 1963 – 1970, 1972, 1977 89
1962 90