GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Generic 🢒 2008 🢒 Unit Repair 🢒 Engine 🢒 Engine Controls and Fuel - LS Engines 🢒 Engine Control Module Replacement

Removal Procedure

    Important: 

       • Turn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control module in order to prevent internal control module damage.
       • Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables, or when charging the vehicle battery.
       • In order to prevent any possible electrostatic discharge damage to the control module, do no touch the connector pins or the soldered components on the circuit board.
       • Remove any debris from around the control module connector surfaces before servicing the control module. Inspect the control module connector gaskets when diagnosing or replacing the control module. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the control module.

  1. Ignition OFF.
  2. Disconnect the negative battery cable.

    3. Object Number: 2037917 Size: SH
  3. Disconnect the engine wiring harness electrical connectors from the ECM.

Installation Procedure

    Object Number: 2037917 Size: SH
  1. Connect the engine wiring harness electrical connectors to the ECM.
  2. Connect the negative battery cable.
  3. If a NEW ECM was installed, the ECM may need to be programmed. Refer to Engine Control Module Programming and Setup.