The engine control module is located under the heater to the side of the gas pedal assembly under the center console. What codes are you getting that make you think it is faulty?
As for repairs, it would depend on what failed but for the most part the ECM is not something the average person can repair. The standard thing to do is to replace the units then program them to match the vehicle.
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Monday, May 20th, 2019 AT 8:38 AM