Just bought a 2016 2500 4x4 and it has the cab clearance lamps. My father in law was telling me to watch out for leaks. Now I'm worried every time it rains I will find a damp stained head liner. My question is: should I do some preventive maintenance and apply a silicon or something or should I not worry about it. How many of you have had no issues and how many have had water problems. What is the fix or has FCA addressed this issue. Thank you for any info.