Detroit Diesel DDEC II III IV ECM. Part # 23519307. All ECM's are Genuine Detroit Diesel Parts. This price is for exchange of your old ECM and does not include a core charge. This also includes programming. Please give us a call to discuss your power options. Every ecm is custom tuned to your specifications to provide a smooth idle and crisp throttle response all the way through the RPM range. There is a $600.00 core charge if you do not have a core to exchange. For faster turnaround time, the core charge can be refunded after we receive your core. We also carry the update harness to upgrade from a DDEC II ECM. We can program for any engine --- Truck, Marine, or Industrial engines. Call for pricing if you want more than one ecm or no programming.