One problem related to roof and pillar has been reported for the 2005 Jeep Grand Cherokee. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Jeep Grand Cherokee based on all problems reported for the 2005 Grand Cherokee.
Water pours in through the a pillars and where the garage opener is. This only happens in the winter months, when the temperature is really cold. This happened 2 or 3 times last winter (2006) and now it has happened 3 times in the last 4 days. The pattern is when the vehicle has snow on roof and it gets really cold then warms up a little the water pours in. The carpet is soaked. I can hear the ice moving around in the a pillars when this happens. The dealer can't simulate this. They put the vehicle in a room and run water over it. I think it has something to do with the water freezing inside and expanding then when it warms up it just pours inside the vehicle. The dealer checked the sunroof and said there was no problem. I think it could be the gaskets for the luggage rack could be cracked or loose, thus water getting in. I can't explain why it doesn't do it when it just rains.