How do you remove an ignition switch with key from 1990 Oldsmobile delta 88 royal?

To remove the ignition switch from a 1990 Oldsmobile Delta 88 Royal, first disconnect the battery to avoid any electrical issues. Then, remove the steering column covers to access the ignition switch. Use a flathead screwdriver to release the retaining tab and turn the switch to the "off" position while pulling it out. Finally, disconnect the wiring harness from the back of the switch before removing it completely.