The Chevrolet Sprint brake light requires a 1157 bulb size for proper installation and function within the lighting assembly. Data for the specified component covers the period from 1985 through 1987.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Chevrolet Sprint uses the 1157 bulb for brake lighting across the 1985-1987 model years.
The 1157 is a dual-filament bulb operating at 12V with a 21W/5W output, meaning its two filaments serve separate functions at different wattages within the same housing.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design that prevents incorrect installation by ensuring only one rotational orientation fits the socket.
The center high mount stop light on the 1986-1987 Sprint uses the 1156 bulb rather than the 1157 used elsewhere in the brake lighting system.
The 1156 is a single-filament bulb rated at 12V and 21W, sharing the same wattage as the higher-filament of the 1157 but without a secondary filament.
The 1156 uses a BA15s bayonet base, a single-pin design that is not interchangeable with the BAY15d base of the 1157 despite the two bulbs appearing physically similar.
Both the 1157 and 1156 are ANSI-standardized bulbs recognized across the United States and Canada, placing them within a widely used classification system for automotive lighting.
The difference in base type between the 1156 and 1157 means the two bulbs are not cross-compatible, and substituting one for the other is not supported by the socket design.