Oldsmobile Cutlass Ciera Dome Light Bulb Size

Oldsmobile Cutlass Ciera dome light bulb specifications include 562, 561, and 906 size options. The replacement chart covers vehicle production spanning 1982 to 1990.

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
1990	562
1989	561
1987-1988	906
1982-1986	561

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	562
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	561
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W.	906

Other Locations

Additional Notes

The Oldsmobile Cutlass Ciera dome light draws from three distinct bulb types across its 1982-1990 model years: the 561, 562, and 906.
The 561 and 562 are both festoon-style bulbs with a 44mm length and end-cap contacts, operating at 12V and 12W. The festoon format means the bulb bridges two spring-loaded metal contacts at each end of a cylindrical housing rather than inserting into a socket.
Despite sharing identical physical dimensions and electrical ratings, the 561 and 562 carry separate ANSI designations, which indicates they are not confirmed as interchangeable for the Cutlass Ciera without further verification.
The 906 is a T10 miniature wedge bulb rated at 12V and 8W. The wedge format uses a pinched glass base that wedges directly into a socket, eliminating the need for a separate metal base or end-cap contacts.
At 8W, the 906 draws less power than the 12W festoon bulbs used in other model years, reflecting a difference in electrical load between the wedge and festoon formats as fitted to this vehicle.
The 561 bulb is specified for the Oldsmobile Cutlass Ciera across the 1982-1986 and 1989 model years, making it the most frequently specified dome light bulb in this vehicle's production run.
The 906 wedge bulb is specified for the 1987-1988 model years, representing a two-year departure from the festoon format before the vehicle returned to a festoon-type bulb in 1989.
The 1990 model year is the only year specifying the 562 bulb. Since the 562 and 561 share the same 44mm festoon form factor and 12V/12W rating, the socket housing in the 1990 model is physically compatible with the festoon format used in earlier years.
All three bulb types conform to ANSI standards applicable in both the United States and Canada, indicating consistent regulatory compliance across the full 1982-1990 production span.
The shift between wedge and festoon formats across different model years means the dome light socket design is not uniform throughout the Cutlass Ciera's production run, and bulbs from festoon-specified years are not physically compatible with the wedge socket used in 1987-1988.