Chevrolet Cavalier Radio Display Bulb Size

Additional Notes

• The Chevrolet Cavalier uses the 194 bulb for its radio display across the 1982-1986 model years.
• The 194 is classified as a miniature wedge bulb under the T10 form factor, a designation that refers to the tubular glass envelope width expressed in eighths of an inch, placing it at approximately 10/8 inches wide.
• The wedge base design means the bulb is held in its socket by the pinched glass base itself rather than by metal pins or a bayonet fitting, which is a common trait in low-current instrument and display applications.
• The 194 operates at 12 volts with a power draw of 3.78 watts, consistent with the low-load requirements of a radio display illumination circuit.
• The 194 carries ANSI standardization recognized in both the United States and Canada, meaning the specification conforms to a defined interchangeability standard across those markets.
• Because the 194 is an ANSI-standardized type, aftermarket and OEM replacements carrying the same designation are generally expected to share the same electrical and physical characteristics, supporting straightforward substitution within that standard.
• The T10 wedge form factor is shared by several related bulb numbers, and substitution with a physically similar but electrically different variant risks mismatched wattage or voltage ratings, which can affect display brightness or socket integrity.