Chevrolet Chevelle Clock Light Bulb Size

The Chevrolet Chevelle clock light uses bulb size 1893 or 1895 depending on the specific application requirements for the interior illumination system. Data for the lighting components covers the period from 1964 through 1971.

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
1971	1893
1970	1895
1969	1893
1969	1895
1964-1968	1895

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 2W.	1893
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 0.9W.	1895

Other Locations

Additional Notes

The 1895 bulb is the most frequently specified clock light across the Chevrolet Chevelle lineup, appearing in the 1964-1968 and 1966-1970 model years, as well as one of two listed options for 1969.
Both the 1893 and 1895 bulbs share the same T5 miniature wedge form factor and operate on a 12-volt circuit, which places them in the same physical housing category despite differing wattage ratings.
The 1893 bulb draws 2 watts, while the 1895 draws 0.9 watts, meaning the two bulbs produce noticeably different light output levels even though they share the same base type.
Both bulbs conform to ANSI standards recognized in the United States and Canada, classifying them as standardized replacements within the North American market.
The 1969 Chevrolet Chevelle lists both the 1893 and 1895 as valid clock light bulb sizes, indicating that two different configurations were used within that single model year.
The 1971 model year specifies only the 1893 bulb, which carries the higher 2-watt rating, distinguishing it from the lower-wattage 1895 used in most surrounding years.
Although the 1893 and 1895 share a T5 wedge base and are physically interchangeable in terms of fitment, substituting one for the other results in a different wattage draw, which may affect clock illumination brightness.