GMC B6000 Courtesy Bulb Size
The GMC B6000 courtesy light utilizes 211-2, 90, 1004, and 194 bulb sizes depending on the specific production period. Available data for the lighting components covers the span from 1980 through 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 |
|---|---|
| 1988-1991 | 211-2 (Medium Duty) |
| 1987 | 90 (Medium Duty) |
| 1986 | 211-2 (Medium Duty) |
| 1985 | 90 (Medium Duty) |
| 1983-1984 | 1004 (Medium Duty) |
| 1982 | 90 (Medium Duty) |
| 1981 | 211-2 (Medium Duty) |
| 1980 | 194 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W. | 211-2 |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 13W. | 90 |
| 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 (T10). 12V, 3.78W. | 194 |