Chevrolet Citation Brake Bulb Size

The Chevrolet Citation brake light requires 1157 and 2057 bulb sizes for the specific lighting components located at the rear of the vehicle. Data for the provided bulb specifications covers the period from 1980 through 1983.

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

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1983	2057	2057	Check Price
1980-1982	1157	P21/5W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W.	2057	Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157	Check Price
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W	Check Price

Other Locations

Additional Notes

The 1157 bulb is specified for the Chevrolet Citation brake lights across the 1980-1982 model years, making it the predominant fitment across the listed production span.
Both the 1157 and 2057 are dual-filament bulbs operating on a 12-volt system, with each filament serving a distinct function, typically combining stop and tail light duties within a single housing.
The 1157 is rated at 21W for its high-intensity filament and 5W for its low-intensity filament, conforming to the ANSI standard recognized in both the United States and Canada.
The 2057 bulb shares the same BAY15d bayonet base as the 1157, meaning both types mount identically in the socket.
The 2057 carries a high-intensity filament rating of 26.9W compared to the 1157's 21W, producing greater output on the brighter filament while retaining the same 8W low-intensity filament as a near equivalent to the 1157's 5W.
The 1983 Chevrolet Citation brake light specification calls for the 2057 rather than the 1157, representing a change from the prior three model years.
Despite the shared BAY15d base allowing physical installation of either bulb in the same socket, the wattage difference between the 1157 and 2057 means the two types are not rated identically and are not confirmed interchangeable within these specifications.