Chevrolet Chevy II Clock Light Bulb Size

The Chevrolet Chevy II clock light uses 1895 and 1816 bulb sizes for the interior illumination components. Data for the specific lighting requirements covers the period 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 Size
1964-1968	1895
1962-1963	1816

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 0.9W.	1895
ANSI standard (US & Canada). Miniature wedge bulb (T3.25). 12V, 4W.	1816

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Additional Notes

The Chevrolet Chevy II used two distinct bulb types for its clock light across the 1962-1968 model years: the 1895 and the 1816, both conforming to ANSI standards applicable in the United States and Canada.
The 1895 bulb is a T5 miniature wedge type rated at 12 volts and 0.9 watts, placing it among the lower-wattage bulbs in automotive instrument lighting applications.
The 1816 bulb is a T3.25 miniature wedge type rated at 12 volts and 4 watts, representing a notably higher wattage output than the 1895.
The T5 and T3.25 designations refer to the tubular envelope size of each bulb, with the numerical suffix indicating the width in eighths of an inch, making the T5 physically larger in envelope width than the T3.25.
The Chevrolet Chevy II (1964-1968) used the 1895 bulb for the clock light, while the 1962-1963 model years used the 1816 bulb, indicating a specification change between the 1963 and 1964 model years.
Despite both bulbs sharing a miniature wedge base format, the wattage difference between the 1895 (0.9W) and the 1816 (4W) means the two types are not electrically interchangeable without potential consequences for the clock illumination circuit.