[toolboy62]

GM cars of recent vintage were set up by default to chirp the horn whenever you used the remote to lock the doors. This was the first thing I defeated whenever I had to drive a different company vehicle. Fortunately the new ones now just lock the door on the first press and then chirp the horn on the second one (if you didn't see the lights flash and need some feedback that your doors are in fact locked.) Much better. Not everything needs to make a noise.

Also annoying: the headlights that stay on for 30 seconds or so after you lock the doors after dark... handy sometimes, but freaking obnoxious if you've parked in front of a restaurant with big glass windows...