Chevrolet El Camino Luggage Compartment Bulb Size

The Chevrolet El Camino luggage compartment utilizes a 1003 bulb size for illumination within the interior storage area. Data for the specific component covers the range from 1964 to 1968.

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
1964-1968	1003

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1003

Other Locations

Additional Notes

The Chevrolet El Camino uses the 1003 bulb for its luggage compartment across the 1964-1968 model years.
The 1003 is an ANSI-standardized bulb recognized in both the United States and Canada, operating at 12 volts and 21 watts.
As a single-filament bulb, the 1003 serves only one lighting function, which is consistent with the straightforward on/off nature of a luggage compartment light.
The 1003 uses a BA15s bayonet base, a single-contact mount where the "s" denotes a single pin, distinguishing it from the dual-contact BA15d variant with which it is not interchangeable.
The BA15s base features a 15mm collar and a single offset pin, meaning only bulbs sharing this exact base configuration are physically compatible with the El Camino's luggage compartment socket across these model years.
At 21 watts, the 1003 draws a moderate current load for an interior compartment application, and substituting a bulb with a significantly higher wattage rating risks overloading the socket or wiring.