Water Leak into the spare compartment
See attached pictures of a 2014 Terrain, holes factory made UNDER THE TAIL LIGHTS, one hole on each tail light of about 3 in x 3 in covered by tape similar to the duct tape, this tape starts curling over the time exposing the hole on the body of the car, when water runs thru the gap around the tailgate goes right in to the trunk or spare compartment, it's very obvious how dumb USA auto industry is, I can't believe that any foreign vehicle is way more quality than USA ones, it;s embarrassing. I had to take off the trim by the latch and both sides panels in order to track the incoming water after I opened the water hose aiming to were the tailgate gap is, nothing to do with gaskets or mastic or anything like that, it was just the poor quality of the most vehicle made in USA.
In order to fix it I used A/C metallic duct tape along with E6000 glue, NO MORE LEAKS SINCE..