Chevrolet Citation Turn Signal Bulb Size

Chevrolet Citation front and rear turn signal bulbs utilize 2057NA, 1034NA, 1157NA, and 1156 bulb sizes depending on location and model configuration. The replacement chart covers 1980 to 1983 production years with corresponding bulb size specifications.

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

Front Turn Signal

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	2057NA	P21/5W	Check Price
1981-1982	1034NA	1034NA	Check Price
1980	1157NA	P21/5W	Check Price

Rear Turn Signal

Years	US Type	EU Type	Shop
1983	1156	P21W	Check Price
1982	1157	P21/5W	Check Price
1980-1981	1156	P21W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. Brighter variant of 1157. 12V, 26.9W/8W.	2057NA	Check Price
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W	Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. Variant of 1157. 12V, 21/5W.	1034NA	Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 21W/5W.	1157NA	Check Price
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156	Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W.	P21W	Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157	Check Price

Other Locations

Additional Notes

The front turn signal position across the 1980-1983 Chevrolet Citation uses three distinct bulb types: the 1157NA (1980), the 1034NA (1981-1982), and the 2057NA (1983), none of which are interchangeable without accounting for wattage and base differences.
The 2057NA and 1034NA bulbs share the same BAY15d dual-offset bayonet base as the standard 1157 family, but they differ in wattage output, making physical fitment possible in some cases while electrical performance will not match.
The 2057NA used in the 1983 front turn signal position operates at 26.9W on its high filament and 8W on its low filament, making it the brightest front turn signal bulb specified across all four model years.
The 1034NA, specified for the 1981-1982 front turn signal, operates at 21W/5W, which is the same wattage rating as the 1157NA, though the two are distinct ANSI part numbers and are not listed as direct substitutes within these specifications.
All three front turn signal bulb types (2057NA, 1034NA, 1157NA) carry the "NA" suffix, which denotes natural amber glass rather than a clear envelope, meaning the amber color is produced by the glass itself rather than by the lamp housing or lens alone.
The rear turn signal position uses only two bulb types across the four model years: the 1156 (1980-1981 and 1983) and the 1157 (1982), which differ fundamentally in filament count and base type.
The 1157 used in the 1982 rear turn signal position has a BAY15d dual-offset bayonet base with two filaments, while the 1156 used in the other three model years has a BA15s single-contact bayonet base with one filament; these two bases are not physically interchangeable.
The 1156 operates as a single-filament bulb at 12V and 21W, functioning solely as a turn signal without a secondary low-wattage filament for parking or running light duty.
The 1157 and 1157NA share the same wattage ratings (21W/5W) and the same BAY15d base, with the only difference being the amber glass coating on the NA variant; the clear 1157 is used in the 1982 rear position, where the lens or housing is presumed to provide the amber color.