How do you change the Dimmer Switch on a 1995 GMC Safari Van?

To change the dimmer switch on a 1995 GMC Safari Van, start by disconnecting the negative battery cable to ensure safety. Then, remove the dashboard panel that surrounds the switch, typically by unscrewing any screws and gently prying it off. Once exposed, disconnect the wiring harness from the old dimmer switch and remove it by unscrewing any mounting screws. Finally, install the new switch by reversing the process, reconnecting the wiring harness, and reattaching the dashboard panel.