hearing a chirp when i ht a bump in my truck

Im hearing a chirp when i hit a bump.it kinda sounds like a window.what might it be

 

might be a window

 

yea when i hit bumps i hear it.

 

I had a similar problem years ago with my 2000 2wd ex cab and the dealer couldn't figure it out either. It would only show up when I was carrying a passenger and I hit a small bump. Turned out that it was the heat shield above the catalytic converter rubbing the bottom of the body. All I did was bend the heat shield back away from the body and it's been fine since.