How do you change a 1987 Buick part avenue multifunction switch lever?

To change the multifunction switch lever on a 1987 Buick Park Avenue, first disconnect the battery to ensure safety. Remove the steering wheel by unscrewing the retaining nut and using a steering wheel puller if necessary. Next, detach the steering column cover and locate the multifunction switch; unscrew and disconnect any wiring harnesses attached to it. Finally, replace the old switch with the new one, reassemble the column, and reconnect the battery.