I tried the solution in the reply, but the noise was still there. I had my daughter sit in the back seat to listen for the noise and when she was on the passenger side, the noise was less. when she moved to the driver side, the noise went away. that explains why I did not hear it during the test drive because my son was sitting in the rear.
So any additional thoughts on how to permanently eliminate the rarattling noise, since I assume it will come back eventually.