Chevrolet Biscayne Instrument Panel Bulb Size

The Chevrolet Biscayne instrument panel utilizes bulb sizes 194, 1895, 257, and 57 depending on the specific version of the component. Data for the lighting components covers the span from 1958 through 1972.

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
1972	194
1971	1895
1967-1970	194
1966	257
1964-1965	1895
1963	257
1962	57
1960-1961	257
1958-1959	57

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 0.9W.	1895
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 instrument panel bulb specifications for the Chevrolet Biscayne span the 1958-1972 model years and reference four distinct ANSI-standard bulb types: the 194, 1895, 257, and 57.
The 194 is a T10 miniature wedge bulb rated at 12V and 3.78W. It is the most frequently specified bulb across the Biscayne instrument panel fitment data, covering the 1967-1970 and 1972 model years.
The 257 is a 12V, 2W festoon or BA9s base instrument bulb. It is the second most recurring type in these specifications, appearing across the 1960-1961, 1963, and 1966 model years.
The 1895 is a T5 miniature wedge bulb rated at 12V and 0.9W, making it the lowest-wattage bulb in this specification set. It is listed for the 1964-1965 and 1971 model years.
The 57 is a single-filament bulb with a BA9s base, rated at 12V and 1W. It is specified for the 1958-1959 and 1962 model years.
The 194 and 1895 both use a wedge-style base, but they are not interchangeable. The 194 uses a T10 form factor while the 1895 uses the smaller T5 form factor, and their wattage ratings differ significantly at 3.78W versus 0.9W respectively.
The 257 and 57 both share the BA9s bayonet base type, though they carry different wattage ratings of 2W and 1W respectively. Physical base compatibility does not guarantee electrical equivalence between these two types.
All four bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada, and all operate on a 12V electrical system.