How you can Take away ECM Modules on GM Cars 1Prop the GM vehicle's hood open. Remove the negative battery cable from the battery's negative terminal. Wait at the least 5 minutes. You might need the power totally off. The moment the negative cable is disconnected from the battery, you may nevertheless need to wait.
There will be residual power remaining in the car that wants die off.2Remove the GM vehicle's glove box. The procedure for this may differ by make and model year ">auto diagnostics software. For by far the most element, you'll require to disengage some retaining clips, too as some stops along the side on the box. You might have to have to take away some screws, particularly in the event the box options exterior hinges connecting its door towards the dashboard.3Remove the retaining bolts on the ECM itself.
The amount of bolts could also vary by car ">auto diagnostic. The bolts is often removed with a socket wrench.4Pull the ECM forward from retainer where it was mounted. Workout care in doing so, because the electrical components are still attached for the module.5Disconnect the wiring. This ought to most be cromprised in the ECM's two harness connectors. It is going to be totally disengaged at this point.6Remove the ECM absolutely.
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