Chevrolet Biscayne Parking Light Bulb Size

The Chevrolet Biscayne parking light utilizes bulb sizes 1157 and 1034 for illumination across various production periods. Data for the specified components covers the range from 1958 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
1964-1972	1157
1958-1963	1034

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.	1034

Other Locations

Additional Notes

The Chevrolet Biscayne parking light specifications cover model years 1958-1972, with two distinct bulb types used across that span: the 1034 for 1958-1963 and the 1157 for 1964-1972.
Both the 1034 and 1157 are ANSI-standardized bulbs recognized in the United States and Canada, operating at 12 volts with a dual-filament configuration rated at 21W and 5W respectively.
The dual-filament design of both bulb types allows a single housing to serve two lighting functions, with the higher-wattage filament typically handling the brighter active state and the lower-wattage filament handling a reduced-intensity state.
Both bulb types share the BAY15d bayonet base, a two-pin offset base that physically prevents incorrect filament orientation during installation.
The 1034 is described as a variant of the 1157, meaning the two share fundamental electrical and physical characteristics while differing in specific output or tolerance parameters defined by their respective ANSI designations.
Because the 1034 and 1157 share the same BAY15d base, physical fitment alone does not confirm interchangeability, as their differing ANSI designations indicate they are distinct specifications for their respective model year applications.