Pontiac Catalina Dome Light Bulb Size

The Pontiac Catalina dome light utilizes bulb sizes 561, 211-2, 1004, and 90 depending on the specific vehicle configuration and requirements for the interior illumination system. Available data for the specified components covers the historical range from 1955 through 1981 for the various lighting options listed.

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
1975-1981	561
1972-1974	211-2
1965-1970	211-2
1963-1964	1004
1962	211-2
1961	1004
1960	90
1955-1959	1004

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	561
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.	1004
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 13W.	90

Other Locations

Additional Notes

The Pontiac Catalina dome light specifications span model years 1955 through 1981, covering four distinct bulb types across that period.
The 211-2 is the most frequently specified bulb across the Catalina's dome light history, appearing in the 1962 and 1965-1974 model years. It is a festoon-type bulb rated at 12V and 12W, with a 41mm length and an SV8.5 base that uses end contacts along its cylindrical body.
The 561 is the second most common bulb in these specifications, covering the 1975-1981 model years. It is also a festoon bulb rated at 12V and 12W, though its length is 44mm rather than the 41mm of the 211-2, and it uses end-cap contacts rather than an SV8.5 base.
Although the 561 and 211-2 share the same voltage and wattage ratings, their physical configurations differ. The 3mm length difference and distinct base types mean the two bulbs are not directly interchangeable without verifying fixture compatibility.
The 1004 is specified for the Pontiac Catalina dome light in the 1955-1959, 1961, 1963-1964 model years. It is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with filaments rated at 21W and 5W respectively.
The 1004 is noted as a variant of the widely known 1157 bulb. Both share the BAY15d bayonet base, though they differ in wattage output, so substitution between the two warrants attention to the specific wattage requirements of the fixture.
The bulb type 90 is specified solely for the 1960 model year. It is a single-filament bulb with a BA15s bayonet base, rated at 12V and 13W. Unlike the 1004, it carries only one filament, making the two bayonet-base bulbs incompatible with each other despite their shared base family.
The 1962 model year uses the 211-2, while the immediately surrounding 1961 and 1963 model years use the 1004, indicating a non-uniform bulb specification across otherwise adjacent production years of the Catalina.
All four bulb types in these specifications conform to ANSI standards recognized in both the United States and Canada, placing them within a standardized North American automotive lighting classification system.
All bulbs specified across the full model year range are rated at 12 volts, consistent with the 12V electrical systems standard in passenger vehicles of that era.