The Chevrolet Beretta brake component utilizes a 2057 bulb size for the lighting system. Data for the specific bulb covers the period from 1987 through 1994.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Chevrolet Beretta uses the 2057 bulb for its brake lights across the 1987-1994 model years, making it the consistent standard for that position throughout the vehicle's entire production run in those years.
The 2057 is a dual-filament bulb operating at 12V with a power draw of 26.9W on the high-intensity filament and 8W on the low-intensity filament, allowing it to serve both brake and tail light functions from a single unit.
The 2057 uses a BAY15d bayonet base, which is an offset-pin base design. The two pins are positioned at different heights, preventing incorrect insertion of the bulb into the socket.
The 2057 is described as a brighter variant of the 1157, meaning the two bulbs share the same BAY15d base and are physically interchangeable in many sockets, though the 1157 produces less light output on its high-intensity filament.
The center high mount stop light on the Beretta uses the 1156 bulb for the 1987-1994 model years, a different bulb type from the one used in the standard brake light positions.
The 1156 is a single-filament bulb rated at 12V and 21W, dedicated solely to stop light function rather than a combined stop and tail light role.
The 1156 uses a BA15s bayonet base, which features two pins at the same height. This base is not interchangeable with the BAY15d base found on the 2057, making the two bulbs incompatible with each other's sockets despite their similar physical appearance.
Both the 2057 and 1156 conform to ANSI standards recognized in the United States and Canada, indicating standardized electrical and mechanical specifications across manufacturers producing these bulb types.