GMC R2500 Suburban Courtesy Bulb Size
The GMC R2500 Suburban courtesy light uses bulb size 1003 or 194 depending on the specific application. Data for the provided specifications covers the range from 1987 to 1991.
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 |
|---|---|
| 1989-1991 | 1003 |
| 1987-1988 | 194 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1003 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W. | 194 |