How do you replace headlight bulb on 2007 Cadillac dts?

To replace the headlight bulb on a 2007 Cadillac DTS, first, open the hood and locate the headlight assembly. Remove the retaining clip or screws holding the assembly in place, then gently pull the assembly forward. Disconnect the electrical connector from the old bulb, twist the bulb socket counterclockwise to remove it, and replace it with a new bulb. Finally, reassemble the headlight assembly and ensure everything is securely fastened before closing the hood.