Hi, I recentlty purchased a 2003 Suburban. After a heavy rainfall a few days ago some water dripped down from the interior light just behind the sunroof. My wife also described a water "swishing"sound in the head liner. After some googling I found some reports that there is some type of sunroof drainage system built into the headliner. Is this true ? Could the drainage gutter just got too full and over flowed.
Thanks