How do you replace ignition switch on a 1986 Chevy silverado?

To replace the ignition switch on a 1986 Chevy Silverado, first disconnect the battery to prevent any electrical issues. Remove the steering column cover by unscrewing it, then locate the ignition switch, which is typically mounted on the steering column. Disconnect the wiring harness from the old switch, remove the mounting screws, and replace it with the new ignition switch. Reassemble the steering column cover, reconnect the battery, and test the new switch to ensure it functions properly.