GMC C2500 Suburban Courtesy Bulb Size
The GMC C2500 Suburban courtesy bulb utilizes 3 distinct sizes: 168, 561, and 194, with each bulb size corresponding to specific applications within the vehicle's interior lighting system. The replacement chart documents courtesy bulb specifications across the 1979 to 1999 production range for this model.
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
If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 1999 | 168 | W5W | Check Price |
| 1998 | 561 | 561 | Check Price |
| 1996-1997 | 194 | W5W | Check Price |
| 1995 | 168 | W5W | Check Price |
| 1993-1994 | 1003 | 1003 | Check Price |
| 1992 | 168 | W5W | Check Price |
| 1985-1986 | 168 | W5W | Check Price |
| 1984 | 1003 | 1003 | Check Price |
| 1983 | 1004 | 1004 | Check Price |
| 1980 | 161 | 161 | Check Price |
| 1979 | 1156 | P21W | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W. | 168 | Check Price |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with W2.1x9.5d wedge base. 12V, 5W. | W5W | Check Price |
| ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W. | 561 | Check Price |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W. | 194 | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1003 | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W. | 1004 | Check Price |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 1W. | 161 | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1156 | Check Price |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W | Check Price |