We stock over 50,000 models of quality used ECMs & ECUs & ECCs. We offer Off-Truck programming, testing and horse power upgrades for many model heavy duty trucks including Cummins. Remanufactured and New OEM products are available from AUTO ECM ECU. We also repair ECM, ECU and ECCs. CHEVROLET ECM, CHEVROLET ECU, CHEVROLET ECC, CHEVROLET computer is brought to you by Auto ECM ECU.