GMC Astro Turn Signal Indicator Bulb Size
The GMC Astro turn signal indicator requires a bulb size of 158 for proper installation and function within the instrument cluster. Data for the specific component covers the range from 1984 to 1988.
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 Type | Shop |
|---|---|---|
| 1984-1988 | 158 (Tiltmaster) | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3W. | 158 | Check Price |