How you can Remove ECM Modules on GM Vehicles

    1

    Prop the GM vehicle's hood open. Remove the unfavorable battery cable in the battery's unfavorable terminal. Wait a minimum of 5 minutes. You can will need the energy fully off. As soon as the negative cable is disconnected from the battery, you might nevertheless have to have to wait. There are going to be residual power remaining in the automobile that requires die off.
    2

    Remove the GM vehicle's glove box. The approach for this can differ by make and model year. For probably the most element, you will need to disengage some retaining clips, also as some stops along the side in the box. You could require to remove some screws, in particular if the box options exterior hinges connecting its door for the dashboard.
    3

    Remove the retaining bolts on the ECM itself. The number of bolts may well also vary by automobile. The bolts can be removed with a socket wrench.
    4

    Pull the ECM forward from retainer where it was mounted. Exercise care in doing so, since the electrical components are nevertheless attached towards the module.
    5

    Disconnect the wiring. This should most be cromprised from the ECM's two harness connectors. It will be fully disengaged at this point.
    6

    Remove the ECM fully.