Chevrolet Chevette front and rear side marker bulbs utilize a 194 bulb size, with rear applications also accommodating a 168 size option. The replacement chart covers vehicle production spanning 1976 through 1987.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Chevrolet Chevette uses the 194 bulb for both front and rear side markers across the 1977-1987 model years, with one exception: the 1976 model year uses the 168 bulb for the rear side marker position only.
The 194 is an ANSI-standardized miniature wedge bulb in the T10 form factor, rated at 12 volts and 3.78 watts.
The 168 is also an ANSI-standardized T10 miniature wedge bulb rated at 12 volts, but it draws 4.9 watts, making it a higher-wattage unit than the 194.
Both the 194 and 168 share the same T10 wedge base, which means they are physically interchangeable in terms of socket fitment, though their wattage ratings differ.
Because the 194 and 168 operate at different wattages, substituting one for the other in the 1976 Chevette rear side marker position would result in a light output level that does not match the original specification for that position.
The ANSI designations for both bulbs apply to the United States and Canada, indicating that these are standardized part numbers recognized across North American automotive applications.
The front side marker position on the Chevrolet Chevette uses the 194 bulb without variation across the entire 1976-1987 production span covered by these specifications.