How do you replace the dimmer switch on a 93 Lumina?

To replace the dimmer switch on a 1993 Chevy Lumina, first disconnect the negative battery cable to ensure safety. Remove the dashboard panel covering the switch, then unscrew and disconnect the old dimmer switch from the wiring harness. Install the new dimmer switch by reversing the process: connect the wiring, secure it with screws, and reattach the dashboard panel. Finally, reconnect the battery and test the new switch.