GMC W6500 Forward Seat Belt Warning Bulb Size
The GMC W6500 Forward seat belt warning light utilizes 158 and PC74 bulb sizes for the instrument panel illumination. Available data for the specified vehicle covers the range 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) |
| 1992-1995 | PC74 (Tiltmaster) |
| 1988-1991 | 158 (Tiltmaster) |
| 1987 | 158 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3W. | 158 |
| ANSI standard (US & Canada). Miniature wedge bulb (T5) with printed circuit board twist-lock socket, for instrument clusters. 12V, 1.4W. | PC74 |