GMC General Courtesy Bulb Size
The GMC General courtesy light requires bulb size 67 or 1004 depending on the specific application for the interior lighting system. Data for the lighting components covers the range from 1984 to 1988.
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 Type | Shop |
|---|---|---|
| 1988 | 67 (Tiltmaster) | Check Price |
| 1985-1987 | 1004 (Tiltmaster) | Check Price |
| 1984 | 67 (Tiltmaster) | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 8W. | 67 | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W. | 1004 | Check Price |