Chevrolet Chevette Parking Light Bulb Size

Additional Notes

• The Chevrolet Chevette uses two distinct parking light bulb sizes across its production run: the 1157 for model years 1976-1982 and the 2057 for model years 1983-1987.
• Both the 1157 and 2057 are ANSI-standardized bulbs recognized in the United States and Canada, and both share the BAY15d bayonet base, a double-contact offset-pin base commonly used in automotive lighting.
• Both bulbs are dual-filament types, meaning each contains two separate filaments within a single housing, one for a higher-intensity function and one for a lower-intensity function.
• The 1157 operates at 12 volts with a power draw of 21W on the high filament and 5W on the low filament.
• The 2057 also operates at 12 volts but draws 26.9W on the high filament and 8W on the low filament, making it the higher-output of the two bulb types used across the Chevette's production span.
• Because the 1157 and 2057 share the same BAY15d base, the 2057 is physically interchangeable with the 1157 in terms of socket fitment, though the two differ in wattage output.
• The 2057 is described as a brighter variant of the 1157, a distinction that reflects its higher filament wattage rather than any difference in base type or voltage rating.
• The shift from the 1157 to the 2057 in the Chevrolet Chevette (1982 to 1983) represents a change in the specified bulb output for the parking light position, with the higher-wattage 2057 applied to the later production years.