Detroit Diesel
| Company type | Subsidiary | 
|---|---|
| Industry | Automotive | 
| Predecessor | General Motors Detroit Diesel-Allison Division | 
| Founded | 1938 | 
| Headquarters | , United States | 
| Products | Heavy-duty diesel engines | 
| Owner | Daimler Truck AG (as of 2000) | 
| Number of employees | 2,300 | 
| Parent | Daimler Truck North America | 
| Website | www | 
Detroit Diesel Corporation (DDC) is an American diesel engine manufacturer headquartered in Detroit, Michigan. It is a subsidiary of Daimler Truck North America, which is itself a wholly owned subsidiary of the multinational Daimler Truck AG. The company manufactures heavy-duty engines and chassis components for the on-highway and vocational commercial truck markets. Detroit Diesel has built more than 5 million engines since 1938, more than 1 million of which are still in operation worldwide. Detroit Diesel's product line includes engines, axles, transmissions, and a Virtual Technician service.
Detroit engines, transmissions, and axles are used in several models of truck manufactured by Daimler Truck North America.