every once in a while, i get a random (single) chime after i shut the key off in my 07, most of the time it doesnt make a sound, any clues as to what might be going on?

 

I have noticed random key chimes when I have a light bulb going out and go over bumps or vibration from the truck at idle. Could be a possible problem. All other chimes I get are normal like low fuel or check engine light.

 

On mine when driving one day it would randomly chime, it did this for quiet awhile but key was on obviously because I was driving it. I had a tail/blinker light bulb out is what it would up being. Finally one of the blinker indicators started blinking really fast it how I actually found it.