How do you remove the ECM on 1991 Pontiac Bonneville?

To remove the ECM (Engine Control Module) from a 1991 Pontiac Bonneville, first disconnect the negative battery cable to ensure safety. Locate the ECM, which is typically found under the dashboard or in the passenger side footwell. Unplug the wiring harness connected to the ECM and remove any screws or bolts securing it in place. Finally, carefully pull the ECM out of its mounting location.