I have a 2014 pro master 2500 gas with 160,000k. I have experienced the same minor coolant leak as many of you have but just been living with it. My issue now is with the heater I am only getting heat out of the driver side. Any idea what may be causing this?
On my 2014, the only manually closeable vents are the ones in the dash. Not on the floor.
I did fashion a deflector for the drivers side as my right foot was always cold. Now, it deflects the air steam on both feet.