Does anyone else on here with a 2014 or 2015 Silverado or sierra have a rattle in the dashboard coming from the plastic panel that houses the defroster vent and ambient light sensor? it can be heard when going over bumps and doesn't act up until the interior warms up a little. If you put light pressure on the piece it seems to stop the rattle. I googled this problem and found some other forums that have discussed the issue. There is also a video on YouTube that shows a jimmy rig fix.

http://youtu.be/ZyUEyiwZhiM