How do you change the headlights in a 2005 Cadillac STS?

To change the headlights in a 2005 Cadillac STS, first, open the hood and locate the headlight assembly. Remove the screws or clips holding the assembly in place, then pull the assembly out carefully. Disconnect the electrical connector from the old bulb, replace it with a new bulb, and reassemble the headlight by reversing the steps. Ensure the new bulb is properly secured and reconnect the electrical connector before closing the hood.