Buick GS 455 Map Light Bulb Size

The Buick GS 455 map light bulb accommodates 3 distinct sizes: 211-2, 194, and 89. The replacement chart covers vehicle production years spanning 1970 to 1972.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1972	211-2
1971	194
1970	89

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	89

Other Locations

Additional Notes

The Buick GS 455 map light uses three distinct bulb types across its 1970-1972 model years: the 211-2, 194, and 89, each representing a different socket type and wattage class.
All three bulb types conform to ANSI standards applicable in both the United States and Canada.
The 211-2 is a festoon-style bulb with an SV8.5 base and a 41mm length, operating at 12V and 12W. Festoon bulbs mount by pressing lengthwise between two spring contacts rather than inserting into a socket.
The 194 is a T10 miniature wedge bulb rated at 12V and 3.78W. Its wedge base is self-retaining and does not use a separate socket locking mechanism.
The 89 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 13W. The BA15s base uses a single locating pin, distinguishing it from the dual-pin BA15d variant.
The 89 bulb is noted as a lower wattage variant of the 1156. Despite the shared bayonet base type, the two are not interchangeable due to the wattage and current draw difference, which affects socket and circuit compatibility.
The 1972 Buick GS 455 uses the 211-2 festoon bulb, which is physically and electrically incompatible with the wedge and bayonet sockets used in the 1970 and 1971 model years.
The 194 wedge bulb used in the 1971 model draws significantly less power at 3.78W compared to the 89 bulb used in 1970 at 13W, reflecting a substantial difference in socket and circuit requirements between those two years.