Chevrolet Corsica Trunk Bulb Size

The Chevrolet Corsica trunk light utilizes 561, 906, 917, and 912 bulb sizes depending on the specific version of the vehicle. Available data covers the range from 1987 through 1996 for the components 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
1995-1996	561
1994	906
1990-1993	917
1987-1989	912

Bulb Specifications

Description	Bulb Size
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
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 18W.	917
ANSI standard (US & Canada). Wedge bulb (T15). Variant of 921. 12V, 12W.	912

Other Locations

Additional Notes

The Chevrolet Corsica trunk bulb specifications span the 1987-1996 model years, covering four distinct ANSI-standard bulb types across that period: the 561, 906, 917, and 912.
The 917 bulb is the most frequently specified type across the Corsica trunk fitment data, appearing in four consecutive model years from 1990-1993. It is a T15 wedge bulb rated at 12V and 18W, making it the highest-wattage trunk bulb used across all listed years.
The 912 bulb, used in the Chevrolet Corsica (1987-1989), is also a T15 wedge type rated at 12V and 12W. It is a recognized variant of the 921 bulb, which means physical and electrical compatibility with 921-type replacements may exist, though substitution should be verified against the specific application.
The 561 is a festoon-type bulb with a 44mm length and end-cap contacts, distinguishing it from the wedge-base types used in all other listed years. It operates at 12V and 12W and was specified for the 1995-1996 model years.
The 906 bulb, specified for the 1994 model year only, is a T10 miniature wedge type rated at 12V and 8W. At 8W, it carries the lowest wattage of any bulb in the Corsica trunk specifications.
The wedge-base bulbs (906, 917, and 912) all use a self-retaining wedge contact system, meaning they do not rely on a separate socket or end-cap to maintain electrical contact. The 561 festoon type, by contrast, is held in place by spring clips and makes contact through its end caps.
The 917 and 912 share the same T15 bulb designation, indicating the same glass envelope size, but they differ in wattage. The 917 draws 18W while the 912 draws 12W, and they are not interchangeable despite the shared form factor.
All four bulb types listed in the Corsica trunk specifications conform to ANSI standards applicable in both the United States and Canada, indicating consistent regulatory compliance across the full range of specified parts.
The transition from the 912 (1987-1989) to the 917 (1990-1993) represents a shift to a higher-wattage bulb within the same T15 form factor, while the subsequent change to the 906 in 1994 marked a reduction to a lower-wattage T10 wedge type.
Because the 1994 model year uses the 906 (T10 wedge) and the surrounding years use physically different bulb types, the 1994 Corsica trunk socket is not compatible with the bulbs specified for any adjacent model year in this data set.