GMC C3500 Courtesy Bulb Size
The GMC C3500 courtesy light uses bulb sizes 561, 168, 194, 1003, 1004, and 1895. Available data for the specified components spans the period from 1979 through 2000.
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 |
|---|---|
| 2000 | 561 |
| 1998-1999 | 168 |
| 1997 | 194 |
| 1996 | 1003 |
| 1992-1995 | 168 |
| 1988-1991 | 1003 |
| 1986 | 194 |
| 1985 | 168 |
| 1981-1984 | 1004 |
| 1980 | 1895 |
| 1979 | 1004 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W. | 561 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W. | 168 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W. | 194 |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1003 |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W. | 1004 |
| ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 0.9W. | 1895 |