I went to open the door today of my truck and I heard a quick noise sounded kinda like a "bing." Almost like a stone hitting the underside but it wasn't as sharp of a sound. It didn't seem to have anything to do with the doorhandle that I touched. It seemed to come from underneath. I thought I heard it once or twice before. The truck had been driven about 30 miles and then stopped for about 20 minutes.

This might not be in the right forum, but I don't know where else it should go.