GMC W7500 Forward Turn Signal Indicator Bulb Size
The GMC W7500 Forward turn signal indicator utilizes bulb sizes 73, 158, 168, and PC194 to provide illumination for the instrument panel during operation. Available data for the specific components covers 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 | PC194 (Tiltmaster) |
| 1992-1994 | 158 (Tiltmaster) |
| 1989-1991 | 73 (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 (T10) with printed circuit board twist-lock socket, for instrument clusters. 12V, 3.78W. | PC194 |
| ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W. | 73 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W. | 168 |