How do you replace a bulb behind the heater ac control panel in a Saturn 2003 l200?

To replace the bulb behind the heater AC control panel in a 2003 Saturn L200, first, disconnect the negative battery cable for safety. Then, carefully remove the trim panel around the control unit using a trim tool to avoid damage. Unscrew the control panel from the dashboard, pull it out, and locate the bulb socket. Twist the socket to remove it, replace the burnt bulb with a new one, and reassemble everything in reverse order.