Chevrolet Corsica Parking Light Bulb Size

Additional Notes

• The Chevrolet Corsica parking light specifications span the 1987-1996 model years and reference four distinct bulb types: 194NA, 2057NA, 194, and 2057.
• The 2057 and 2057NA are dual-filament bulbs with a BAY15d bayonet base, operating at 12V with a high-filament draw of 26.9W and a low-filament draw of 8W. The dual-filament design allows one bulb to serve both steady and reduced-intensity functions.
• The 194 and 194NA are single-filament miniature wedge bulbs of the T10 type, rated at 12V and 3.78W. Their significantly lower wattage reflects a simpler, single-function role compared to the 2057 series.
• The "NA" suffix on the 194NA and 2057NA designates natural amber glass, meaning the amber color is produced by the glass itself rather than by a colored lens or coating. The non-NA variants, 194 and 2057, use clear glass instead.
• The Chevrolet Corsica (1991-1995) uses the 2057NA for its parking light, making it the most frequently specified bulb across the model's production run covered in these specifications.
• The 2057NA is described as a brighter variant of the 1157, sharing the same BAY15d bayonet base. This means a standard 1157 is physically compatible with the 2057NA socket, though the two bulbs differ in output levels.
• The 194 and 194NA share the same T10 wedge base and identical wattage, meaning the physical fitment is the same between the two. The only functional difference is the amber glass present in the NA version.
• The 1990 and 1996 model years both specify the 194NA, while 1989 specifies the non-NA 194. All three share the same T10 wedge base and 3.78W rating, but the 1989 specification calls for clear glass rather than natural amber glass.