Chevrolet C60 Back Up Light Bulb Size

The Chevrolet C60 back up light utilizes a single 1156 bulb size for the rear illumination system. Available data for the specified vehicle covers the 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

Years	Bulb Size
1960-1988	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The Chevrolet C60 uses the 1156 bulb for the back up light position across all listed model years from 1960 to 1988.
The 1156 is a single-filament bulb, meaning it serves one lighting function rather than combining two, such as stop and tail, into a single unit.
It operates on a 12-volt electrical system and draws 21 watts, which is consistent with standard incandescent automotive lighting output for reverse applications.
The 1156 uses a BA15s bayonet base, a single-contact mount where the bulb is inserted and rotated to lock into the socket.
The 1156 conforms to ANSI standards and is specified for both the United States and Canada, indicating regulatory compliance across both markets.
Because the same bulb size applies without variation across the entire 1960-1988 range, no year-specific fitment distinctions exist for this position on the C60.
The BA15s base is not interchangeable with the BA15d base, which is a dual-contact bayonet fitting used on twin-filament bulbs, so substitution between the two base types is not compatible.
The 1156 is also sold under the trade designation 7506 in some markets, though both designations refer to the same ANSI-rated single-filament, BA15s bayonet bulb at 12V and 21W.