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The product is a genuine OEM engine control module assembly ECM ECU for 2013-2019 GM vehicles, with part numbers 12653998 and 12657781. This module requires programming and uses EEPROM memory. Made of metal and manufactured by General Motors in the United States, it comes with one assembly and is designed for the front placement on the vehicle. This ECM is not a vintage part and does not offer a manufacturer warranty. It is a crucial component for controlling the engine performance and ensuring optimal functioning of the vehicle.