Chevrolet Cavalier Brake Bulb Size

Additional Notes

• The Chevrolet Cavalier brake bulb specifications cover two distinct bulb types across the full model range: the dual-filament 3057 and 2057 for standard brake lights, and the single-filament 912, 1141, and 1156 for the Center High Mount Stop Light.
• The 2057 bulb is specified for the Chevrolet Cavalier standard brake lights from 1982-1994. It is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a power draw of 26.9W on the high filament and 8W on the low filament.
• The 3057 replaces the 2057 as the standard brake bulb from 2000-2005. Unlike the 2057, the 3057 uses a T25 wedge base rather than a bayonet mount, making the two bulbs physically incompatible despite their similar dual-filament function.
• Both the 2057 and 3057 are dual-filament bulbs, meaning a single unit serves two lighting functions, typically stop and tail, through separate filaments operating at different wattages.
• The 2057 is described as a brighter variant of the 1157, sharing the same BAY15d bayonet base. This base type uses two pins offset at different heights to prevent incorrect insertion.
• The Center High Mount Stop Light on the Cavalier uses three different single-filament bulb types across its production years: the 1156, the 1141, and the 912, none of which are interchangeable with the dual-filament brake bulbs used in the standard brake light positions.
• The 1141 and 1156 share the same BA15s bayonet base and identical electrical ratings of 12V and 21W. Despite these similarities, they are listed as separate part numbers and are not universally treated as interchangeable across all fitment applications.
• The 912 is a T15 wedge bulb rated at 12V and 12W, making it the lowest-wattage bulb in the Cavalier brake light specifications. It is a variant of the 921 and is specified solely for the 2005 Center High Mount Stop Light.
• All five bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada, indicating a standardized electrical and physical specification recognized across North American markets.
• The Center High Mount Stop Light specification for the Cavalier shows variation across individual model years, with the 1156 appearing in 1986-1993 entries and the 1141 appearing in others, meaning year-specific verification is relevant when sourcing a replacement for that position.