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How do you replace the ECU for a 2003 suburban?

Anonymous

∙ 17y ago

Updated: 12/9/2022

The ECU , electronic control unit sends and receives messages from the sensors in the car. Disconnect the battery and look for a silver rectangular module in the engine compartment. Lift the locking tab and pull, unbolt the screws to release the old ECM.

Wiki User

∙ 17y ago

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