Cadillac DTS License Plate Bulb Size

The Cadillac DTS license plate light requires a 194 bulb size for proper installation and function within the rear exterior lighting assembly. Data for the specified component covers the period from 2006 through 2011.

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
2006-2011	194

Bulb Specifications

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

Other Locations

Additional Notes

The Cadillac DTS uses the 194 bulb for the license plate position across all listed model years, spanning 2006-2011.
The 194 bulb is classified as a T10 miniature wedge type, a form factor defined by its wedge-shaped base that connects directly into a socket without a separate metal cap or pins.
Operating specifications for the 194 bulb are rated at 12 volts and 3.78 watts, placing it in the low-wattage range typical of illumination and indicator applications rather than primary lighting.
The 194 designation follows ANSI standardization recognized in both the United States and Canada, meaning the bulb specification conforms to a defined industry standard rather than a proprietary or manufacturer-specific sizing.
The T10 wedge base format of the 194 bulb is widely shared across many vehicle makes and positions, which contributes to broad aftermarket availability and the existence of direct-fit LED substitutes built to the same base format.
Because the 194 bulb is an ANSI-standardized type, physical fitment compatibility with the Cadillac DTS (2006-2011) license plate socket depends on the T10 wedge base, not solely on the bulb number designation itself.