Pontiac Bonneville Automatic Transmission Indicator Bulb Size
The Pontiac Bonneville automatic transmission indicator utilizes bulb sizes 74, 168, 194, 1895, 57, and 257 depending on the specific version. Available information covers the span from 1958 through 1992.
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 |
|---|---|
| 1992 | 74 |
| 1991 | 168 |
| 1988 | 168 |
| 1981-1986 | 194 |
| 1964-1971 | 1895 |
| 1961-1963 | 57 |
| 1958-1960 | 257 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W. | 74 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W. | 168 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W. | 194 |
| ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 0.9W. | 1895 |
| ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 1W. | 57 |
| ANSI standard (US & Canada). Festoon or BA9s base instrument bulb. 12V, 2W. | 257 |