Cadillac STS Courtesy Bulb Size
The Cadillac STS courtesy bulb uses a 906 size bulb for interior lighting applications. The replacement chart covers vehicle production spanning 2005 to 2011 with corresponding bulb specifications.
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 |
|---|---|
| 2010-2011 | 906 |
| 2005 | 906 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W. | 906 |