How do you replace an ignition switch for a 1989 Oldsmobile Cutlass Calais?

To replace the ignition switch on a 1989 Oldsmobile Cutlass Calais, first disconnect the negative battery cable to avoid electrical issues. Remove the steering column cover by unscrewing the screws, then locate the ignition switch attached to the steering column. Disconnect the wiring harness from the old switch and remove it by unscrewing the mounting screws. Install the new ignition switch by reversing the steps, ensuring everything is securely reconnected before reassembling the steering column cover and reconnecting the battery.