The Cadillac Allante front and rear side marker bulb size is 194 for all configurations. The replacement chart covers 1987 to 1993 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 Cadillac Allante uses the 194 bulb for both front and rear side marker positions across the 1987-1993 model years.
The 194 is an ANSI-standardized bulb type recognized across the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared by all compliant manufacturers.
The 194 bulb follows the T10 miniature wedge form factor, which uses a tapering plastic base that wedges directly into a socket without a separate metal base or locking mechanism.
The 194 operates at 12 volts and draws 3.78 watts, placing it in the low-wattage range typical of marker and courtesy lighting applications.
Because the Cadillac Allante uses the same 194 bulb in all four side marker positions, a single bulb type services the entire side marker system on the vehicle.
The T10 wedge base is one of the most widely produced miniature bulb formats, and the 194 designation is interchangeable with several functionally equivalent types, such as the 168 and 192, though wattage differences among those types can affect brightness and socket compatibility.
The consistent use of the 194 across all seven model years of the Allante indicates no mid-cycle revision to the side marker bulb specification during the vehicle's production run.