Chevrolet C70 Parking Light Bulb Size

The Chevrolet C70 parking light requires 1157 and 2057 bulb sizes for proper illumination across various production periods. Available information covers the specific time range from 1960 through 1988.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1984-1988	1157	P21/5W	Check Price
1983	2057	2057	Check Price
1979-1982	1157	P21/5W	Check Price
1960-1961	1157	P21/5W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157	Check Price
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W	Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W.	2057	Check Price

Other Locations

Additional Notes

The 1157 is the dominant parking light bulb across the Chevrolet C70 specifications, appearing in eleven of the twelve model years listed, spanning 1960-1961 and 1979-1988.
The 1157 is a dual-filament bulb rated at 12V with a 21W high filament and 5W low filament, mounted on a BAY15d bayonet base, and classified under the ANSI standard applicable in the US and Canada.
The 2057 is specified for the 1983 Chevrolet C70, and it shares the same BAY15d bayonet base as the 1157 while operating at 12V with a higher output of 26.9W and 8W across its two filaments.
Because both the 1157 and 2057 use the BAY15d bayonet base, the physical mounting interface is the same between the two bulb types, which is a relevant fitment consideration for the 1983 model year.
Despite the shared base, the 2057 draws more wattage on both filaments than the 1157, meaning the two are not electrically identical and substitution between them warrants attention to the vehicle's socket and circuit ratings.
Both bulb types carry ANSI standardization, indicating they conform to a defined set of performance and dimensional criteria recognized across the North American market.
The dual-filament design of both bulbs allows a single unit to serve two lighting functions, which is typical in parking light applications where the same socket may handle both parking and stop or turn signal duties.