Chevrolet Corsica Tail Light Bulb Size

Additional Notes

• The Chevrolet Corsica tail light specifications span the 1987-1996 model years, with two distinct bulb types appearing across that range: the 194 and the 2057.
• The 2057 is the more frequently specified bulb, appearing in seven of the ten model years covered: 1987-1989, 1991-1994.
• The 194 is a T10 miniature wedge bulb rated at 12V and 3.78W, standardized under ANSI specifications for the US and Canadian markets.
• The 2057 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a two-wattage output of 26.9W on the high filament and 8W on the low filament, also carrying ANSI standardization for US and Canadian markets.
• The dual-filament design of the 2057 allows a single bulb to serve both brake and running light functions at different intensities, which is a common arrangement in tail light assemblies.
• The 2057 is described as a brighter variant of the 1157, meaning the two share the BAY15d bayonet base but differ in wattage output; this distinction is relevant to fitment, as substituting one for the other affects light output.
• The 194 and 2057 use physically incompatible bases, the wedge base versus the BAY15d bayonet base, meaning the two bulb types are not interchangeable with each other.
• The 1990 Corsica is specified with the 194 rather than the 2057, which differs from both the preceding year (1989) and the following years (1991-1994), making year-specific verification relevant for that model year.
• The 1995-1996 Corsica models are specified with the 194, a single-filament low-wattage bulb, in contrast to the dual-filament 2057 used in earlier years.