Chevrolet B60 Courtesy Bulb Size

The Chevrolet B60 courtesy light utilizes bulb sizes 90, 211-2, and 1003 across various applications. Data for the specified lighting components covers the range from 1980 through 1991.

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
1988-1991	90
1987	211-2
1986	90
1985	211-2
1984	1003
1980-1983	211-2

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 13W.	90
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1003

Other Locations

Additional Notes

The Chevrolet B60 courtesy bulb specifications span the 1980-1991 model years, with three distinct bulb types appearing across that range: the 90, the 211-2, and the 1003.
The 211-2 is the most frequently specified courtesy bulb across the B60 range, covering the 1980-1983, 1985, and 1987 model years. It is a festoon-style bulb with a 41mm length, SV8.5 base, rated at 12V and 12W, and conforms to ANSI standards for the US and Canadian markets.
The type 90 bulb is specified for the 1986 and 1988-1991 model years. It is a single-filament bulb with a BA15s bayonet base, rated at 12V and 13W, and also carries ANSI certification for US and Canadian markets.
The type 1003 appears only in the 1984 model year. Like the 90, it uses a BA15s bayonet base and operates at 12V, but it draws significantly more power at 21W, making it the highest-wattage courtesy bulb in this specification set.
Although the 90 and 1003 share the same BA15s bayonet base, their wattage ratings differ substantially. Substituting one for the other without accounting for the wattage difference could affect circuit load and light output.
The 211-2 festoon bulb uses an SV8.5 base, which is physically incompatible with the BA15s bayonet socket used by both the 90 and 1003. These bulb types are not interchangeable across different socket configurations.