When doing replacement or upgrading on 1975 – 1989 Buick Skyhawk, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

• Buick Skyhawk Bulb Size Guide

1975 – 1989 Buick Skyhawk Bulb Size Guide
Low Beam Headlight	1975 – 1978, 1982 – 1988	H4656
	1989	H4703
High Beam Headlight	1975 – 1978, 1982 – 1988	H4651
	1989	H4701
High Beam and Low Beam Headlight	1979 – 1980	H6054
Front Fog Light	1986 – 1989	H3-55W
Back Up Light	1975 – 1980, 1982 – 1989	1156
Brake	1975 – 1980, 1982 – 1983	1157
	1984 – 1989	2057
Dome Light	1975 – 1980, 1982 – 1987	561
	1988	562
	1989	578
Front Side Marker	1975 – 1980, 1982 – 1989	194
Front Turn Signal	1975 – 1980, 1982 – 1984	1157
	1985 – 1989	2057
License Plate	1975 – 1980, 1982 – 1989	194
Parking Light	1975 – 1980, 1982 – 1985	1157
	1986 – 1989	2057
Rear Side Marker	1975 – 1980, 1982 – 1989	194
Rear Turn Signal	1980	1156
	1975 – 1979, 1982 – 1983	1157
	1984 – 1989	2057
Tail Light	1975 – 1980, 1982 – 1983	1157
	1984 – 1989	2057
Center High Mount Stop Light	1988 – 1989	1156
	1986 – 1987	912
Courtesy	1982 – 1989	168
	1977	1893
	1979	194
	1975 – 1976	562
Engine Compartment Light	1976 – 1979	1003
	1980, 1982 – 1987	1156
	1988 – 1989	89
Glove Box	1980	1891
	1975 – 1979	1893
	1985 – 1988	194
Map Light	1989	1003
	1980	1004
	1988	562
	1982 – 1987	90
Radio Display	1975 – 1976	1816
	1978	1893
	1979 – 1980, 1982 – 1987	194
Trunk	1975 – 1976, 1980, 1982 – 1987	1003
	1988 – 1989	89