The GMC Sprint front and rear side marker bulbs both utilize a 194 bulb size across the model line. The replacement chart covers 1971 through 1977 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 GMC Sprint uses the 194 bulb for both the front and rear side marker positions across the 1971-1977 model years.
The 194 is an ANSI-standardized bulb recognized across the United States and Canada, operating at 12 volts with a power draw of 3.78 watts.
The 194 bulb follows the T10 miniature wedge form factor, a designation that describes its tubular envelope shape and wedge-style base, which requires no separate metal socket pins.
The wedge base design of the T10 means the bulb is held in place by the tension of the socket itself rather than by a bayonet or screw mechanism.
Because the GMC Sprint (1971-1977) uses the same 194 bulb in all four side marker positions, a single bulb type serves the entire side marker system on the vehicle.
The T10 wedge format is widely produced, and the 194 designation is shared across many vehicle makes and model years, which reflects broad interchangeability at the bulb level provided the socket housing is physically compatible.