GMC C7000 Turn Signal Bulb Size
GMC C7000 front and rear turn signal bulbs utilize 1157, 1073, and 2057 sizes for front applications and 1157 and 1073 sizes for rear positions. The replacement chart covers 1979 through 1990 production 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
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 |
|---|---|---|---|
| 1985-1990 | 1157 (Medium Duty) | P21/5W | Check Price |
| 1073 (Tiltmaster) | 1073 | Check Price | |
| 1984 | 2057 (Medium Duty) | 2057 | Check Price |
| 1073 (Tiltmaster) | 1073 | Check Price | |
| 1981-1983 | 1157 (Medium Duty) | P21/5W | Check Price |
| 1979-1980 | 1157 | P21/5W | 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 |
|---|---|---|---|
| 1984-1990 | 1157 (Medium Duty) | P21/5W | Check Price |
| 1073 (Tiltmaster) | 1073 | Check Price | |
| 1981-1983 | 1157 (Medium Duty) | P21/5W | Check Price |
| 1979-1980 | 1157 | P21/5W | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W. | 1157 | Check Price |
| ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W. | P21/5W | 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). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W. | 2057 | Check Price |