Allison 1000 Series
| Manufacturer / Brand | Allison Transmission |
| Gear Ratio / Speeds | 5- or 6-speed, depending on version |
| Part / Model Identifier | ALLISON-1000 |
| Example Applications | Selected Chevrolet Silverado HD and GMC Sierra HD trucks |
Heavy-duty commercial-grade torque-converter automatic transmission engineered for severe-duty government, military, and commercial fleet haulage.