when it rains water is getting trapped in my cadillac cts 2003 ~ i can hear is sloshing around in the back and on the side doors ~ please help!!!

Some of the drains in the vehicle may be clogged or the water shroud by the firewall may be broken and allowing water to come in. Does it have a sunroof? There is also a drain there that could be clogged. I would recommend getting it to a shop or the dealer to have it looked at. Good luck and I hope this helped a little.

thanks Tom