Why is my paint coming of on cab
How often do you wash and wax your car? Keep in mind, too, your truck is 13 years old as well.
Without seeing the paint problem in person a reasonable guess is not possible. Could be just the clearcoat or because of rock chip damage. Have a body shop look at it before rust starts .
There have been reports by owners of this issue at our partner site, CarComplaints. Here is what I found if interested.