4 0 Cummins CM550 ISB ECM Part # 3990517 for 2687 Diesel Engine Contact for price (GOOD USED) Cummins ISB ECM Part # 3990517, CM550, NON-EGR Model, CPL 2687 Stock# 3603 All ourPARTSareTESTEDand ShipPRIORITY MAIL!OVERNIGHT SHIPPINGoptions are available! Contact us for... ConditionUsedCPL/ARR2687Fits To EquipmentDiesel EngineFits To Make(s)CumminsFits To Model(s)2687Part Number3990517Stock Number3603 MLS Number11415562CategoryEngine Control Modules (ECM) Last Updated3/18/2025 LocationOpa Locka, FL, US Sold ByCA Truck Parts Inc. (305) 688-___ SHOWNUMBERCall Seller Email Seller Save More Info