GMC W7500 Forward High Beam Indicator Bulb Size
The GMC W7500 Forward high beam indicator utilizes unique bulb sizes 158, 168, 194, and 1445 for the specified lighting component. Available data for the mentioned vehicle covers the range from 1984 through 1996.
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 |
|---|---|
| 1996 | 158 (Tiltmaster) |
| 1993-1995 | 168 (Tiltmaster) |
| 1992 | 158 (Tiltmaster) |
| 1990-1991 | 168 (Tiltmaster) |
| 1989 | 158 (Tiltmaster) |
| 1988 | 168 |
| 1445 (Medium Duty, With 4 Rectangular Headlights) | |
| 1987 | 168 |
| 1986 | 1445 |
| 168 | |
| 158 (Tiltmaster) | |
| 1985 | 158 |
| 168 | |
| 194 (Medium Duty) | |
| 1984 | 168 |
| 1445 (Medium Duty, With 4 Rectangular Headlights) | |
| 158 (Tiltmaster) |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3W. | 158 |
| 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 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W. | 194 |