Chevrolet Nova front and rear side marker bulbs utilize 194 and 194NA bulb sizes for optimal lighting function. The replacement chart covers 1969 through 1988 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Chevrolet Nova uses the 194 bulb as the sole bulb type across both front and rear side marker positions for the majority of its model years covered in these specifications.
The 194 is an ANSI-standardized miniature wedge bulb in the T10 form factor, rated at 12 volts and 3.78 watts, recognized under both US and Canadian standards.
The T10 wedge base design requires no separate metal base or socket pins, as the glass envelope itself acts as the retaining element within the housing.
The 194NA shares the same ANSI classification, T10 form factor, voltage, and wattage as the standard 194, with the sole distinction being its natural amber-tinted glass envelope.
The Chevrolet Nova (1969-1970) front side marker positions call for the 194NA rather than the clear 194, meaning the amber tint is built into the bulb itself rather than the lens housing on those model years.
Because the 194 and 194NA are electrically and physically identical, installing a standard 194 in a front side marker position specified for the 194NA would produce a white or pale output rather than the intended amber color if the lens housing is clear.
The rear side marker positions for 1969-1970 use the standard 194, not the 194NA, indicating the amber coloring on the rear is achieved through the lens rather than the bulb on those model years.
From 1971-1979 and 1985-1988, both front and rear side marker positions on the Nova share the same 194 bulb specification, making the front and rear positions interchangeable in terms of bulb fitment for those years.