GMC K1500 Suburban Courtesy Bulb Size
The GMC K1500 Suburban courtesy light uses bulb sizes 93, 168, 194, 561, 1003, and 1004 depending on the specific application within the interior lighting system. Data for the provided bulb specifications covers the range from 1979 through 1999 for the listed vehicle.
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 |
|---|---|
| 1999 | 168 |
| 1998 | 561 |
| 1997 | 168 |
| 1995-1996 | 1003 |
| 1994 | 194 |
| 1992-1993 | 168 |
| 1986 | 1003 |
| 1985 | 194 |
| 1984 | 1003 |
| 1983 | 1004 |
| 1979-1980 | 93 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W. | 168 |
| 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. 12V, 21W. | 1003 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W. | 194 |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W. | 1004 |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W. | 93 |