Chevrolet Corsica Turn Signal Bulb Size

Chevrolet Corsica front and rear turn signal bulbs utilize 2057NA and 2057 bulb sizes respectively for proper illumination. The replacement chart covers 1987 through 1996 model 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
1990-1996	2057NA	P21/5W	Check Price
1987-1989	2057	2057	Check Price

Rear Turn Signal

Years	Bulb Type	Shop
1987-1996	2057	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. Brighter variant of 1157. 12V, 26.9W/8W.	2057	Check Price

Other Locations

Additional Notes

The 2057 and 2057NA are the two bulb types specified across all front and rear turn signal positions on the Chevrolet Corsica for model years 1987-1996.
Both the 2057 and 2057NA are ANSI-standardized dual-filament bulbs operating at 12V with a high-beam draw of 26.9W and a low-beam draw of 8W, mounted on a BAY15d bayonet base.
The BAY15d bayonet base features two offset pins, which physically prevent incorrect installation of single-filament bulbs into a dual-filament socket.
Both bulb types are described as brighter variants of the 1157, meaning they share the same base and general form but produce higher light output on the high-filament circuit.
The sole distinction between the 2057 and the 2057NA is the glass envelope: the 2057NA uses natural amber-tinted glass, while the 2057 uses clear glass.
The Chevrolet Corsica (1990-1996) uses the 2057NA for the front turn signal position, which produces an amber output directly from the bulb rather than relying on a colored lens.
The rear turn signal position on the Corsica uses the standard 2057 across all model years 1987-1996, indicating the amber color at the rear is produced by the lens rather than the bulb itself.
Because the 2057 and 2057NA share the same BAY15d base and identical wattage ratings, they are physically interchangeable, though substituting a clear 2057 in a front socket designed for the 2057NA may affect the amber color output if the housing lens is also clear.