Chevrolet S10 Automatic Transmission Indicator Bulb Size
The Chevrolet S10 automatic transmission indicator utilizes bulb sizes PC74, PC194, 194, and PC161 depending on the specific version of the component. Data for the light sources covers the range from 1987 through 1997.
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 |
|---|---|
| 1994-1997 | PC74 |
| 1991-1993 | PC194 (With Digital Inst. Cluster) |
| 194 (Without Digital Inst. Cluster) | |
| 1989-1990 | PC74 |
| 1988 | PC161 |
| 1987 | PC74 |
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 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W. | 194 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10) with printed circuit board twist-lock socket, for instrument clusters. 12V. | PC161 |