GMC 3000 Turn Signal Bulb Size
GMC 3000 front turn signal bulbs utilized 1034 and 1073 sizes, while rear turn signal bulbs used 1073 and 1156 sizes. The replacement chart covers 1960 through 1966 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Front Turn Signal
| Years | Bulb Type | Shop |
|---|---|---|
| 1964-1966 | 1034 | Check Price |
| 1962-1963 | 1073 | Check Price |
| 1961 | 1034 | Check Price |
| 1960 | 1073 | Check Price |
Rear Turn Signal
If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 1965-1966 | 1073 | 1073 | Check Price |
| 1961-1964 | 1156 | P21W | Check Price |
| 1960 | 1073 | 1073 | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W. | 1034 | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W. | 1073 | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1156 | Check Price |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W | Check Price |