Chevrolet Caprice Map Light Bulb Size

The Chevrolet Caprice map light utilizes bulb sizes 12961, 192, 1004, and 562 for various interior lighting applications across the vehicle interior. Data for the specified components covers the time range from 1966 through 2017.

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
2011-2017	12961
1991-1992	192
1987-1990	1004
1982-1985	1004
1978	1004
1966-1970	562

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3W.	192
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.	1004
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	562

Other Locations

Additional Notes

The Chevrolet Caprice map light bulb specifications reference four distinct bulb types across the model's production history: the 12961, 192, 1004, and 562.
The 1004 is the most frequently specified bulb across the listed years, covering the Chevrolet Caprice from 1978 through 1985 and again from 1982 through 1988, making it the dominant fitment across the broadest span of model years in these specifications.
The 562 is a festoon-type bulb with a 44mm length and end-cap contacts, operating at 12V and 12W. Its higher wattage relative to the other bulb types in these specifications reflects a physically larger format designed to span a housing rather than insert into a socket.
The Chevrolet Caprice used the 562 festoon bulb for the 1966-1970 model years, representing the earliest fitment recorded in these specifications.
The 1004 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V and 21/5W. It is described as a variant of the 1157, a widely recognized automotive bulb standard, though the 1004 carries different wattage ratings than the 1157.
The 192 is a T10 miniature wedge bulb rated at 12V and 3W, specified for the 1991-1992 Caprice. At 3W, it draws less power than the T10-format 12961, which is rated at 5W.
The 12961 is a Philips-designated part number rather than an ANSI standard designation. It is a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W, and is specified for the Chevrolet Caprice across the 2011-2017 model years.
Both the 12961 and the 192 share the T10 wedge form factor, but they are not confirmed as interchangeable in these specifications. The 12961 carries a Philips-specific designation and a 5W rating, while the 192 follows the ANSI standard at 3W.
The BAY15d base of the 1004 features offset pins, a design that prevents incorrect installation by ensuring the bulb can only be seated in one orientation. This is a standard characteristic of the BAY15d bayonet fitting used in dual-filament automotive applications.
Three of the four bulb types in these specifications follow ANSI standards recognized in the United States and Canada, while the 12961 is identified by a manufacturer-specific Philips part number rather than an ANSI designation.