Like so many others on this forum, my brand new 2019 3500 has a leak. It presented as a leak from the rear headliner speaker on the drivers side. I applied a bead of silicone to the third brake light, from my previous experience with the 2014 that I traded. Well, that didn’t solve the problem. Today I notice that two of the five overhead cab clearance lights are heavily covered with condensation on the inside of the lens. Two out of five. That’s a 40% failure rate.
If any forum members have a leak that is difficult to locate, check the clearance lights.
If any forum members have a leak that is difficult to locate, check the clearance lights.