Solved my wind noise issue.
Problem: Lots of wind noise coming from driver and passenger side front windows. Noticeable at higher speeds (+70mph) or if a strong crosswind AND vents were on and set to fresh air. If recirc button was pressed, wind noise would go away. It was apparent that the fresh air setting was creating additional cabin pressure, which in turn was pushing out on the windows. Recirc eliminates the additional cabin pressure, but you can still recreate the noise by slightly pushing on the windows. Had to take a test drive with the mechanic so that he could confirm.
Solution: Replaced door gaskets on both front side doors. Report from mechanic said that the original gaskets were worn and slightly torn in some areas. The new gaskets fixed the wind noise issue...sounds like a new truck once again.
Also, I should mention that I had an earlier issue with road noise / rattling coming from the back of the truck cab. Again, problem would only occur when venting was on fresh air, and went away when recirc air button was pressed. This issue was eventually fixed by dealer installing gasket between the cab and bed of the truck.
If you're having either of these issues, I highly recommend having the door gaskets / cab-bed gasket examined.