Chevrolet Beretta Tail Light Bulb Size

The Chevrolet Beretta tail light requires bulb size 2057 or 194 depending on the specific application. Data for the tail light covers the range from 1987 to 1994.

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
1993-1994	2057
1992	194
1987-1991	2057

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W.	2057
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

Other Locations

Additional Notes

The 2057 bulb is the tail light specification for the Chevrolet Beretta across the majority of its production years, covering 1987-1991 and 1993-1994.
The 2057 is a dual-filament bulb with a BAY15d bayonet base, operating at 12V with a wattage split of 26.9W on the high filament and 8W on the low filament, which allows it to serve both braking and running light functions from a single unit.
The 2057 is classified as a brighter variant of the 1157, meaning the two bulbs share the same BAY15d base type but are not identical in output and should not be treated as direct substitutes without accounting for the wattage difference.
Both the 2057 and 194 are ANSI-standardized bulbs recognized in the United States and Canada, meaning their electrical and physical specifications are governed by a consistent industry standard rather than proprietary sizing.
The 1992 Chevrolet Beretta is specified with a 194 bulb for the tail light position, which is a miniature wedge-type bulb (T10) operating at 12V and 3.78W, a single-filament low-wattage unit with a fundamentally different base type than the 2057.
Because the 194 uses a wedge base and the 2057 uses a BAY15d bayonet base, the two bulb types are physically incompatible with each other and cannot be interchanged between model years without a socket modification.
The single-filament, low-wattage nature of the 194 in the 1992 model year contrasts with the dual-filament 2057 used in surrounding years, indicating a difference in tail light circuit design for that year.