I had this plastic on plastic sound on the passenger side dashboard...this started last weekend when it was cold outside and drove me crazy, I looked around and came up with this piece of foam under the hood and windshield bezel next to the hood hinge....After a few field adjustments on this piece of foam I took my truck for a test drive and its gone....for now! will report in a few days, just thought I would share as this might save someone some time and cure a issue

 

Any luck on this? Just picked up a '14 Platinum and in the first few hundred miles it's developed a plastic on plastic rattle. Debating if it's a quick fix or if I should take the time to have the service guys monkey around with it. Didn't have this issue on both of my '11 Lariats.

 

Its been fine after I removed those plastic inserts under the hood....try that