The Pontiac T1000 front and rear side marker bulbs both require a 194 size bulb for proper operation. The replacement chart covers vehicle production spanning 1981 to 1987.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Pontiac T1000 uses the 194 bulb for both the front and rear side marker positions across the full 1981-1987 model range.
The 194 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 194 bulb is a miniature wedge type, designated T10, which refers to its tubular glass envelope width of 10 millimeters. The wedge base design eliminates the need for a separate metal base, as the glass pinch itself locks into the socket.
The 194 operates at 12 volts and draws 3.78 watts, placing it in the low-wattage category typical of side marker and courtesy lighting applications.
Because the Pontiac T1000 uses the same 194 bulb in all four side marker positions, front and rear sockets accept the same replacement unit without distinction.
The T10 wedge format is widely shared across many vehicle makes and lighting positions, which means 194 bulbs sourced for other applications may physically fit the T1000's side marker sockets, though voltage and wattage ratings should match the 12V, 3.78W specification to maintain correct illumination and avoid electrical stress on the circuit.