GMC W7500 Forward Parking Brake Indicator Bulb Size
The GMC W7500 Forward parking brake indicator uses bulb sizes 158, 168, and PC74. Data for the specific components spans the period 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) |
| 1995 | PC74 (Tiltmaster) |
| 1994 | 158 (Tiltmaster) |
| 1992-1993 | PC74 (Tiltmaster) |
| 1989-1991 | 158 (Tiltmaster) |
| 1988 | 158 (Tiltmaster) |
| 168 (With 2 Round Headlamps) | |
| 1985-1987 | 158 |
| 168 (With 2 Round Headlamps) | |
| 1984 | 158 (Tiltmaster) |
| 168 (With 2 Round Headlamps) |
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 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W. | 168 |