Good Cummins ISB 5.9L 24-Valve Diesel Engine ECM ICM ECU Computer Part P3990517. (TESTED PART) FITS CUMMINS ISB 5.9L 24-Valve Diesel Engine CM550, NON-EGR Model DIESEL ENGINE, PART# P3990517. The item "Good Cummins ISB 5.9L 24-Valve Diesel Engine ECM ICM ECU Computer Part P3990517" is in sale since Friday, February 7, 2020. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Computer, Chip, Cruise Control\Engine Computers". The seller is "machineryandtruckparts" and is located in Rockwood, Tennessee.This item can be shipped to United States.