bring the truck to your stealiship ,it a tsb. think it AC water when you driving at high velocity,the water is push inside. think if u are out warranty they still fixed for free! i use this between carpet and floor:bag full of water.
The doors windows have wet seals. It keeps a large portion of water out but yea some does get in. You have to make sure you clean the drain holes at the bottom of the doors. If you have a outside or get dirty Raptor they can accumulate dirt and block the drains. I simply take a zip tie and use that to clean the dirt out