Chevrolet Caprice Clock Light Bulb Size

The Chevrolet Caprice clock light utilizes bulb sizes 168, 1816, 194, and 1895 depending on the specific application for the vehicle. Available data for the components covers the range from 1966 to 1989.

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
1980-1989	168
1978	1816
1976	194
1968-1970	194
1966-1967	1895

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Miniature wedge bulb (T3.25). 12V, 4W.	1816
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 0.9W.	1895

Other Locations

Additional Notes

The Chevrolet Caprice clock light bulb specifications cover model years 1966-1989, with four distinct bulb sizes used across that span: 168, 1816, 194, and 1895.
The 168 bulb is the most consistently specified across the Caprice lineup, covering the 1980-1989 model years without variation. It is an ANSI-standard miniature wedge bulb in the T10 envelope, rated at 12V and 4.9W.
The 194 bulb shares the same T10 envelope form factor as the 168 but draws slightly less power at 3.78W versus 4.9W. Despite this physical similarity, the two are separate ANSI designations and are not listed interchangeably in these specifications.
The 194 bulb is specified for the Chevrolet Caprice clock in the 1968-1970 and 1976 model years, all at 12V.
The 1816 bulb, specified for the 1978 model year, uses a T3.25 envelope, which is physically smaller than the T10 used by the 168 and 194. It is rated at 12V and 4W.
The 1895 bulb, specified for the 1966-1967 model years, uses a T5 envelope and is rated at just 0.9W, making it the lowest-wattage bulb among the four types listed. It operates at 12V.
All four bulb types conform to ANSI standards applicable in both the United States and Canada, and all are miniature wedge-base designs, meaning they use a wedge-style base rather than a bayonet or screw base.
The T10, T5, and T3.25 designations refer to the tubular glass envelope width expressed in eighths of an inch, so a T10 envelope is 10/8 inch wide, a T5 is 5/8 inch wide, and a T3.25 is approximately 3.25/8 inch wide. These physical differences affect fitment in the clock housing.
Because the 168 and 194 share the T10 envelope, physical installation may be possible in either application, but the wattage difference means the two are distinct ANSI types and the specifications do not treat them as substitutes for one another.
The 1895 at 0.9W represents a notably lower power draw than the other three types, which range from 3.78W to 4.9W, reflecting a different design requirement for the clock illumination in the 1966-1967 Caprice.