How do you replace ecm 1988 Oldsmobile delta 88?

To replace the ECM (Engine Control Module) in a 1988 Oldsmobile Delta 88, first disconnect the negative battery terminal to prevent electrical shorts. Locate the ECM, typically found under the dashboard or in the engine compartment, and unbolt it from its mounting bracket. Carefully unplug the wiring harness and remove the old ECM, then install the new one by reversing the process: plug in the wiring harness, secure the ECM, and reconnect the battery. Finally, start the engine to ensure the new ECM is functioning correctly.