I just purchased a 2013 access cab and right away on the way home from the dealership I notice a whirling noise inside the cab at various speeds. I drove the truck for about a week and then returned to the dealer. They said that there were a couple of reports on this issue and stated that the side mirrors were to blame. They said with a slight design change on the mirrors on the 2012-13 models, more issues with this were reported. How to verify if this is the issue, fold back both side mirrors and test drive. Be careful when doing this test because you will not be able to see without those mirrors during your test drive. If the noise is gone, then you know you have the same issue as I. The mirrors are adjustable within the door, however, I will be letting the dealer make the adjustments or replace the mirrors. Besides, its brand new with a 5 year warranty.