Since 2001, Diesel System Services has been offering diesel engine repair services to the San Diego area and to customers all over the United States. Specializing in diesel diagnostics, repair and parts for diesel pickup trucks, commercial trucks, RV'S and equipment. From stock repair to custom built high performance diesel engines and fuel supply (FASS) and Bosch fuel injection systems. From stock daily driver mileage injectors to custom edm extreme race injectors, injection pumps and performance parts. Covering Dodge Cummins, GMC/Chevy Duramax, Ford Powerstroke, over the road commercial trucks Cummins, Caterpillar, Detroit,  and International engines and fuel injection. Stock to custom turbochargers, intercoolers, cold air intakes and exhaust. Custom engine machine work is also available. We also offer in house front end and rear end differential rebuilding and re-gearing. We sell commercial heavy duty drive train parts, rebuilt transmissions, differentials and transfer cases. For Eaton Fuller, Spicer, Rockwell Meritor, Allison, Dana, ZF, Chelsea (pto), and New Process. We are now offering completely remanufactured Electronic Control Modules (ECM) and PCM's .