Chevrolet Caprice Engine Compartment Light Bulb Size

Chevrolet Caprice engine compartment light bulb sizes include 561, 1156, and 93 configurations across various production specifications. The replacement chart covers vehicle data spanning 1966 to 1992.

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
1991-1992	561
1988-1989	1156
1987	93
1981-1986	1156
1980	93
1978-1979	1003
1977	1156
1972-1976	1003
1970	1156
1969	93
1967-1968	1156
1966	93

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	561
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	93
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1003

Other Locations

Additional Notes

The Chevrolet Caprice engine compartment light draws from four distinct bulb types across its production span: the 561, 1156, 93, and 1003.
The 1156 is the most frequently specified bulb across the Caprice engine compartment fitments, appearing in 1967-1968, 1970, 1977, 1981-1986, and 1989.
The 1156 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 21W under the ANSI standard applicable in both the US and Canada.
The 1003 shares the same 12V, 21W rating and BA15s bayonet base as the 1156, yet the two are distinct ANSI part numbers and are not interchangeable without verification of socket and application compatibility.
The 1003 is specified for the Caprice engine compartment in 1972-1976, 1978-1979.
The 93 is a single-filament bulb with a BA15s bayonet base rated at 12V and 13W, making it a lower-wattage variant relative to the 1156 and 1003, despite sharing the same base type.
Although the 93, 1156, and 1003 all use the BA15s bayonet base, the wattage difference of the 93 means it is not a direct substitute for the higher-wattage types in applications where output levels are a factor.
The 93 is specified for the Chevrolet Caprice engine compartment in 1966, 1969, 1980, and 1987.
The 561 is a festoon-style bulb with a 44mm length and end-cap contacts, rated at 12V and 12W. Its physical form and contact type differ entirely from the BA15s bayonet base used by the other three bulb types in these specifications.
The 561 festoon bulb is specified for the Caprice engine compartment in 1991-1992, representing a fitment that is physically incompatible with any of the bayonet-base bulbs listed for earlier model years.