Chevrolet Chevy II Radio Display Bulb Size

The Chevrolet Chevy II radio display utilizes 1893 and 1891 bulb sizes for the internal illumination components. Provided information covers the period from 1962 through 1968 for the specified vehicle.

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
1964-1968	1893
1962-1963	1891

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, 2W.	1891

Other Locations

Additional Notes

The Chevrolet Chevy II uses two bulb types across its model years for the radio display: the 1893 for 1964-1968 and the 1891 for 1962-1963.
Both the 1893 and 1891 are ANSI-standardized bulbs, meaning they conform to a defined set of electrical and physical specifications recognized across the United States and Canada.
Each bulb is classified as a T5 miniature wedge type. The T5 designation refers to a tubular envelope with a width of 5/8 inch, and the wedge base eliminates the need for a separate socket with locking pins, as the glass envelope itself acts as the retention mechanism.
Both bulbs operate at 12 volts and consume 2 watts, which places them in the low-wattage range typical of instrument and radio illumination applications.
Despite sharing identical voltage, wattage, base type, and envelope shape, the 1893 and 1891 carry different ANSI part numbers, which indicates a distinction in at least one rated characteristic such as luminous intensity or filament design.
The 1893 and 1891 are not confirmed as interchangeable in the Chevrolet Chevy II application. The specifications assign each bulb to a distinct set of model years, and substituting one for the other is not supported by the provided fitment data.