2020 HD 3500 water leaking from the back window during a rain storm.

[Farmergus]

43,000 miles on my 2020 3500 HD Silverado, I found water leaking in the rear window at the top of the frame.  I called the dealer they said they would have to remove the headlines but suspected it was a bad seal they might have to replace the window. I took it to a. Auto glass replacement company I trust the technician said it is most likely leaking around the bolts that hold on the 3rd brake light assembly.  He said a friend has a    2019 Silverado under warrantee the dealer  removed  the headliner and sealed the bolts that hold the 3rd brake light. I also saw a U Tube video on how to remove the headliner and reseal the bolts.

 

Has anyone else had this problem  please let me know.

[bowtie2007]

Many owners have had this leak. The frame at the top of the window develops cracks which begin to leak. I had a 2019 Sierra 1500 and now have a 2020 Sierra 2500. Both windows leaked. There is a TSB and a very long thread regarding the topic under the 1500 thread.