Disconnect the cable(s) from the negative battery terminal(s). Remove the instrument cluster trim panel or center trim panel. Remove the A/C Switch retaining screws. To detach the A/C Switch, remove these four screws. Pull the switch out far enough to disconnect the electrical connectors and the vacuum harness connector. Pull out the A/C Switch far enough to disconnect the four electrical connectors and the vacuum harness connector. Remove the switch. Installation is the reverse of removal. Verify that all controls operate correctly.