Ummm... mine did something like that but i was an idiot though. I rotated the dimmer switch to all the way up one morning to make the dash lights bright but didn't notice that the overhead lights where on. So I got home got out of the truck and turned the headlights off and pulled the key out and it still dinged... couldn't figure out what it was. Then I started the truck back up and noticed the over head lights were on so I rotated back down some, lights went off and so did the dinging. I felt mildly retarded. :rant: