Chevrolet El Camino Clock Light Bulb Size

The Chevrolet El Camino clock light utilizes bulb sizes 168, 1895, 194, and 257 depending on the specific application. Data for the provided components covers the range from 1959 through 1987.

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
1980-1987	168
1969-1970	1895
1968	194
1964-1967	1895
1959-1960	257
1959-1960	57

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 0.9W.	1895
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Festoon or BA9s base instrument bulb. 12V, 2W.	257
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 1W.	57

Other Locations

Additional Notes

The Chevrolet El Camino clock light bulb specification covers model years 1959-1960, 1964-1970, and 1980-1987, with three distinct bulb types appearing across those years: the 168, 1895, 194, 57, and 257.
The 168 bulb is the most consistently specified type across the data, serving the Chevrolet El Camino clock from 1980-1987. It is an ANSI-standard T10 miniature wedge bulb rated at 12V and 4.9W.
The 1895 bulb is the second most frequently specified type, covering model years 1964-1967 and 1970. It is an ANSI-standard T5 miniature wedge bulb rated at 12V and 0.9W, making it significantly lower in wattage than the 168.
Although the 168 and 194 are both T10 miniature wedge bulbs operating at 12V, they are not the same bulb. The 168 is rated at 4.9W while the 194 is rated at 3.78W, and the two carry separate ANSI designations. The 1968 El Camino uses the 194 specifically.
The 1959 and 1960 El Camino clock positions each list two bulb sizes simultaneously, the 57 and the 257, suggesting those model years accommodated more than one bulb configuration for the clock.
The 57 bulb is a single-filament type with a BA9s bayonet base, rated at 12V and 1W. The 257 shares the BA9s base fitment but is described as a festoon or BA9s instrument bulb rated at 12V and 2W, doubling the wattage of the 57.
The BA9s base used by both the 57 and 257 is a physically distinct mounting type from the wedge base used by the 168, 194, and 1895 bulbs. These base types are not interchangeable with one another.
The T5 wedge form factor of the 1895 is physically smaller than the T10 wedge form factor shared by the 168 and 194. Despite all three being wedge-base bulbs, their housing sizes differ and they are not cross-compatible.
All five bulb types in the specification, the 168, 1895, 194, 57, and 257, conform to ANSI standards applicable in both the United States and Canada.
The 1968 model year stands apart from adjacent years in the specification. While 1964-1967 and 1970 all use the 1895, the 1968 El Camino clock uses the 194, a different ANSI-designated bulb with a higher wattage rating.