Chevrolet B60 Tail Light Bulb Size

The Chevrolet B60 tail light requires 1157 and 2057 bulb sizes according to the provided specifications for the vehicle. Available data covers the range from 1980 through 1991 for the specified components.

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
1984-1991	1157
1983	2057
1980-1982	1157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W.	2057

Other Locations

Additional Notes

The 1157 bulb is the tail light specification for the Chevrolet B60 across the majority of the listed model years, covering 1980-1982 and 1984-1991.
The 1157 operates at 12 volts with a dual-filament design rated at 21W for the high-intensity filament and 5W for the low-intensity filament, making it suitable for combined stop and tail light functions within a single housing.
The 1157 uses a BAY15d bayonet base, a two-pin offset base type in which the two pins are positioned at different heights to prevent incorrect insertion.
The 2057 bulb is specified for the 1983 B60, the only model year in the listed range to use this bulb type.
The 2057 shares the same BAY15d bayonet base and 12-volt operating voltage as the 1157, but draws significantly more power at 26.9W and 8W across its two filaments respectively.
Because the 1157 and 2057 share the same base type, physical fitment between the two is possible, but the difference in wattage ratings means they are not direct equivalents and substitution may affect light output.
Both the 1157 and 2057 are classified under ANSI standards applicable in the United States and Canada.