How do you replace light dimmer switch unit on a 2001 Monte Carlo?

To replace the light dimmer switch unit on a 2001 Monte Carlo, first disconnect the negative battery terminal to ensure safety. Remove the trim panel surrounding the dimmer switch by gently prying it off with a flat tool. Unscrew and disconnect the old dimmer switch from the wiring harness, then install the new switch by reversing the process. Finally, reattach the trim panel and reconnect the battery.