Shop used Mack Pinnacle CXU612 Engine Control Modules (ECM) on MyLittleSalesman.com . Compare active listings with prices from $300 to $995. Sellers include Garabedian Equipment, DTI Truck Parts, and CRG Heavy Truck Parts. Filter by condition, price, or year to find the Mack Pinnacle CXU612 Engine Control Module (ECM) that fits your job.