Ok, today I found out that the passenger side front floor board was wet. I do live in Florida,where it rained for 3 days straight this past weekend. Haven't had a chance to check it out. Anyone have any clue when to start looking?

 

open your door and check the seal that runs parallel to your windshield. lift it up a bit, i found some corrosion under mine then sealed it back and it was fine.

check your 3rd brake light for the heck of it and the seals all around the cab of the truck.

 

Thanks for the info on the seals, will do tomorrow. I've already replaced the third brake light with an LED 1 from LMC Truck, which stopped the leak I had from there.