GMC Caballero Courtesy Bulb Size
The GMC Caballero courtesy light utilizes bulb sizes 561, 631, and 906 depending on the specific application. Data for the light components covers the range from 1978 to 1987.
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 |
|---|---|
| 1987 | 561 |
| 1983-1986 | 631 |
| 1982 | 906 |
| 1981 | 631 |
| 1980 | 561 |
| 1978-1979 | 631 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W. | 561 |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W. | 631 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W. | 906 |