GMC P4500 Courtesy Bulb Size
The GMC P4500 courtesy light utilizes 211-2, 90, 1003, 1004, 168, and 1445 bulb sizes depending on the specific application. Available data covers the range from 1979 through 1990.
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 |
|---|---|
| 1988-1990 | 211-2 (Medium Duty) |
| 1987 | 90 (Medium Duty) |
| 1985-1986 | 211-2 (Medium Duty) |
| 1984 | 1003 (Medium Duty) |
| 1983 | 1004 (Medium Duty) |
| 1981-1982 | 211-2 (Medium Duty) |
| 1980 | 168 (Medium Duty) |
| 1979 | 1445 (Medium Duty) |
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). 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 (T10). 12V, 4.9W. | 168 |
| ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 2W. | 1445 |