ECM – GM (12728504)

GM Genuine Parts supplies this ECM under part number 12728504 as a factory-pattern replacement. It controls fuel and spark using the factory calibration and connector. Catalogue application notes: 6.6L diesel. Confirm the number on the part you are removing matches 12728504 before ordering; superseded numbers are the same component under a later release. GM Genuine Parts are the components installed during production or validated by General Motors for GM vehicles. Held in US stock for same-week dispatch.