How do you change out a light switch for 1970 Chevelle ss?

To change out a light switch in a 1970 Chevelle SS, first disconnect the battery to prevent any electrical shock. Remove the dashboard panel or trim surrounding the switch to access it. Unplug the wiring harness from the old switch, then unscrew and remove the switch itself. Install the new switch by reversing the process: attach the wiring harness, secure the switch with screws, and reassemble the dashboard panel before reconnecting the battery.