GMC Sonoma Parking Brake Indicator Bulb Size
The GMC Sonoma parking brake indicator bulb uses either PC74 or PC194 size specifications depending on the model year. The replacement chart covers 1993 through 2001 production years with corresponding bulb size data.
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 |
|---|---|
| 1994-2001 | PC74 |
| 1993 | PC194 (With Digital Inst. Cluster) |
| PC74 (Without Digital Inst. Cluster) |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| 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) with printed circuit board twist-lock socket, for instrument clusters. 12V, 3.78W. | PC194 |