When doing replacement or upgrading on 1968 – 1972 Buick GS 350 400 455, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

• Buick GS Bulb Size Guide
• Buick GS 350 Bulb Size Guide
• Buick GS 400 Bulb Size Guide
• Buick GS 455 Bulb Size Guide

1970 – 1972 Buick GS Bulb Size Guide
Low Beam Headlight	1970 – 1972	H5006
High Beam Headlight	1970 – 1972	H5001
Back Up Light	1970 – 1972	1156
Brake	1970 – 1972	1157
Dome Light	1971	194
	1970	211-2
	1972	212-2
Front Side Marker	1972	194
	1970	194NA
	1971	97
Front Turn Signal	1970 – 1972	1157
License Plate	1970 – 1972	97
Parking Light	1970 – 1972	1157
Rear Side Marker	1971	1157
	1970, 1972	194
Rear Turn Signal	1970 – 1972	1157
Tail Light	1970 – 1972	1157
Courtesy	1971	194
	1970, 1972	90
Engine Compartment Light	1972	1004
	1970	89
Glove Box	1970, 1972	1893
Map Light	1971	194
	1972	578
	1970	89
Radio Display	1972	1893
Trunk	1971	194
	1970, 1972	89

1968 – 1969 Buick GS 350 Bulb Size Guide
Low Beam Headlight	1968 – 1969	H5006
High Beam Headlight	1968 – 1969	H5001
Back Up Light	1968 – 1969	1156
Brake	1968 – 1969	1157
Dome Light	1968	1004
	1969	211-2
Front Side Marker	1968 – 1969	194NA
Front Turn Signal	1968 – 1969	1157
License Plate	1968 – 1969	97
Parking Light	1968 – 1969	1157
Rear Side Marker	1968 – 1969	194
Rear Turn Signal	1968 – 1969	1157
Tail Light	1968 – 1969	1157
Courtesy	1968 – 1969	90
Engine Compartment Light	1968 – 1969	89
Glove Box	1968 – 1969	1893
Map Light	1968 – 1969	89
Trunk	1968 – 1969	89

1968 – 1969 Buick GS 400 Bulb Size Guide
Low Beam Headlight	1968 – 1969	H5006
High Beam Headlight	1968 – 1969	H5001
Back Up Light	1968 – 1969	1156
Brake	1968 – 1969	1157
Dome Light	1968	1004
	1969	211-2
Front Side Marker	1968 – 1969	194NA
Front Turn Signal	1968 – 1969	1157
License Plate	1968 – 1969	97
Parking Light	1968 – 1969	1157
Rear Side Marker	1968 – 1969	194
Rear Turn Signal	1968 – 1969	1157
Tail Light	1968 – 1969	1157
Courtesy	1968 – 1969	90
Engine Compartment Light	1968 – 1969	89
Glove Box	1968 – 1969	1893
Map Light	1968 – 1969	89
Trunk	1968 – 1969	89

1970 – 1972 Buick GS 455 Bulb Size Guide
Low Beam Headlight	1970 – 1972	H5006
High Beam Headlight	1970 – 1972	H5001
Back Up Light	1970 – 1972	1156
Brake	1970 – 1972	1157
Dome Light	1971	194
	1970	211-2
	1972	212-2
Front Side Marker	1972	194
	1970	194NA
	1971	97
Front Turn Signal	1970 – 1972	1157
License Plate	1970 – 1972	97
Parking Light	1970 – 1972	1157
Rear Side Marker	1971	1157
	1970, 1972	194
Rear Turn Signal	1970 – 1972	1157
Tail Light	1970 – 1972	1157
Courtesy	1971	194
	1970, 1972	90
Engine Compartment Light	1972	1004
	1970	89
Glove Box	1970, 1972	1893
Map Light	1971	194
	1972	578
	1970	89
Radio Display	1972	1893
Trunk	1971	194
	1970, 1972	89