Cadillac Seville License Plate Bulb Size

The Cadillac Seville license plate light uses a 194 bulb size for illumination purposes on the rear of the vehicle. Available information covers the span of time from 1976 through 2004.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1976-2004	194

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

Other Locations

Additional Notes

The Cadillac Seville uses the 194 bulb for the license plate position across all listed model years, spanning 1976-2004.
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 operates at 12 volts with a power draw of 3.78 watts, placing it among the lower-wattage bulbs in automotive applications.
The 194 conforms to ANSI standards recognized in both the United States and Canada, meaning it is produced to a consistent specification across North American markets.
The wedge base design of the T10 format means the bulb is held in its socket by the tension of the glass envelope itself rather than by a separate metal base, which is a common trait in low-current automotive lighting positions such as license plate illumination.
Because the 194 designation is an ANSI-standardized type, bulbs carrying that number from different manufacturers are generally interchangeable with one another, provided they share the same voltage and wattage rating.