GMC W6500 Forward High Beam Indicator Bulb Size
The GMC W6500 Forward high beam indicator utilizes bulb sizes 1445, 158, 168, and PC74 across various production periods. Available information covers the specific span from 1987 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) |
| 1995 | 168 (Tiltmaster) |
| 1994 | 158 (Tiltmaster) |
| 1993 | PC74 (Tiltmaster) |
| 1990-1992 | 168 (Tiltmaster) |
| 1989 | 158 (Tiltmaster) |
| 1988 | 168 |
| 1445 (Medium Duty, With 2 Round Headlights) | |
| 1987 | 168 |
| 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). Miniature wedge bulb (T5) with printed circuit board twist-lock socket, for instrument clusters. 12V, 1.4W. | PC74 |
| ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 2W. | 1445 |