What are those??

[DDEANB]

Relatively new owner, 2015 Ecodiesel Tradesman, I was hauling some mulch and some fell between the truck bed and cab back panel. As I was cleaning it out, I noticed two plastic rectangles on the back cab panel. Of course it is a tight view back there. Just wondering, what the heck are those? Somebody has got to know, right?

 

[Joes1500]

Vents for the cab.

 

[desync0]

Probably the cab air vents.

Let's pressure out of the cab to make it easier to close the doors and lets air out so fresh air can come in the a/c ducts.