1993 barn door leak

[dockrenali]

Happy Holidays all! I'm new to this forum so this may be an old topic I just couldn't find but Ruby (my wife's 93 2500 4x4 Burb) the rear carpet is wet after rain when parked. I can't tell if it's weather stripping or something else. Idea's? Solutions? Thank you all

 

[zora]

Take a water hose and have someone inside as you go over each section of the door and the glass