How do you get the horn to beep when locking the car on a 2003 Buick LeSabre with the key fob?

To get the horn to beep when locking your 2003 Buick LeSabre with the key fob, you typically need to enable the feature in the vehicle's settings. Start by pressing the "Unlock" button on the key fob to unlock the doors, then press and hold the "Lock" button for about five seconds until you hear a beep. This should activate the horn beep feature for locking the doors. If this does not work, consult the owner's manual for specific instructions related to your vehicle's settings.