Chevrolet Chevy II High Beam Indicator Bulb Size

The Chevrolet Chevy II high beam indicator requires bulb sizes 1895, 257, or 57 depending on the specific application. Available data for the bulb sizes covers the range from 1962 through 1968.

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 Type	Shop
1964-1968	1895	Check Price
1963	257	Check Price
1962	57	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 0.9W.	1895	Check Price
ANSI standard (US & Canada). Festoon or BA9s base instrument bulb. 12V, 2W.	257	Check Price
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 1W.	57	Check Price

Other Locations

Additional Notes

The Chevrolet Chevy II uses three distinct bulb types across its model years for the high beam indicator: the 1895, the 257, and the 57, all of which conform to ANSI standards applicable in the United States and Canada.
The 1895 is a T5 miniature wedge bulb rated at 12V and 0.9W. The wedge base design means the bulb is held in place by tension against its socket contacts rather than by a separate metal base, which is a common trait of low-wattage instrument panel applications.
The 1895 bulb is specified for the Chevrolet Chevy II across the 1964-1968 model years, making it the most consistently used high beam indicator bulb in this vehicle's production run covered by these specifications.
The 257 is a festoon or BA9s base instrument bulb rated at 12V and 2W. At 2W, it draws more power than either the 1895 or the 57, which reflects a different circuit and socket design in the 1963 model year instrument cluster.
The 57 is a single-filament bulb with a BA9s base, rated at 12V and 1W. The BA9s base uses a small bayonet-style cap with a 9mm collar, a format also shared by the 257 bulb, though the two are not interchangeable due to differences in wattage and physical form factor.
The 257 and the 57 both carry a BA9s base designation, which may suggest physical similarities in their mounting interface, but their differing wattage ratings and bulb forms mean substituting one for the other is not supported by these specifications.
The 1895 wedge base is physically incompatible with the BA9s sockets used for the 257 and 57 bulbs, as the two base types require entirely different socket designs. A 1895 bulb cannot be fitted into a BA9s socket without modification.
The shift from the 57 in 1962 to the 257 in 1963, and then to the 1895 from 1964 onward, reflects changes in the instrument panel socket configuration across production years, meaning replacement bulbs must correspond to the specific model year rather than the broader nameplate.