The Buick Lucerne side marker requires a 194 bulb size for proper installation and function within the lighting assembly. Data for the specified component covers the range from 2006 to 2011.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Buick Lucerne uses the 194 bulb for both front and rear side markers across its entire production run of 2006-2011.
The 194 is classified as a miniature wedge bulb, designated T10 in the international bulb sizing system, where "T" refers to the tubular shape and "10" indicates the width in eighths of an inch.
The 194 bulb operates at 12 volts and draws 3.78 watts, placing it among the lower-wattage bulbs found in automotive exterior lighting applications.
The wedge base design of the T10 means the bulb is held in its socket by the tension of the base itself rather than by a separate metal contact pin, which is a common fitment method in side marker applications.
The 194 carries ANSI standardization recognized in both the United States and Canada, meaning the specification reflects a consistent electrical and physical standard across North American markets.
Because the Buick Lucerne (2006-2011) uses the same 194 bulb size in both the front and rear side marker positions, a single bulb type serves all four side marker housings on the vehicle.
The T10 wedge format is shared by several bulb numbers beyond the 194, and not all T10-based bulbs are electrically identical, so wattage ratings warrant attention when substituting bulbs in the Lucerne's side marker sockets.