In case anyone noticed water dripping on floor inside their truck, check your a/c drain. The other day I had fog coming out of dash vents, didn't think much of it as it was real humid out. Then I noticed water dripping on the center hump of my floor board yesterday. Today I put it up on ramps and found the drain hose. It's located on the passenger side firewall right under the evaporator. It has a rubber hose attached and bend 90 degree bend down. Used blow gun and shot air up inside hose and man the water poured out, got a shower. Must have been almost half a gallon came out. 2014 2500 HD Durmax.