Not a project I really wanted to deal with, but I knew it was going to happen sooner than later...... This morning it was 28 degrees outside and frost on the windows, and even after 20 minutes, I am getting maybe air at 60 degrees out of the vents in the truck. Its a little hard to defrost the windows with air that cool coming out of the vents with the heat turned all the way up. At least they are less than half what the dealer wants through amazon. I am going to start with the easiest 2, and worry about the third one later that will require a complete dash tear down to get to.