Chevrolet Impala Limited front and rear side marker bulbs use a 194 size bulb for replacement applications. The chart contains bulb size specifications covering 2014 through 2016 vehicle production years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 194 bulb is the sole bulb size specified for both the front and rear side markers of the Chevrolet Impala Limited across the 2014-2016 model years.
The 194 bulb follows the ANSI standard recognized in the United States and Canada, placing it within a regulated specification framework for electrical and photometric performance.
It is a miniature wedge-base bulb, classified under the T10 designation. The wedge base means the glass envelope itself acts as the retention mechanism, with no separate metal base or pins involved.
The T10 designation refers to the bulb's tubular envelope width, expressed in eighths of an inch, making it approximately 10/8 of an inch wide.
The 194 operates at 12 volts, which is consistent with the standard electrical system voltage found in conventional passenger vehicles.
Its rated wattage of 3.78W places it in the low-power category, typical of side marker applications where continuous illumination is required without significant heat or current draw.
Because the front and rear side marker positions share the same 194 bulb size on the Impala Limited, a single bulb type serves all four side marker sockets on the vehicle.
The wedge-base format of the T10 bulb is widely used across many vehicle makes and positions, which means aftermarket and OEM-equivalent 194 bulbs are broadly available in this fitment.