Have same problem but water on headliner and drivers side floor front and back. Like a flood. Sunroof
tracks fill with water. Took to dealer. Made it worse.
JA: What is the model/year of your Cadillac?
Customer: 2002 STS
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: Just used q tips to clean tray and rubber stripping.
JA: Anything else you think the mechanic should know?
Customer: Sometimes water drips out of plastic covers on roof. Also getting bubbled paint near and just above back window. Was told window would need to be removed to fix.
JA: What part of the car is the leak coming from? Have you checked the hoses?
Customer: No. Car was garaged for years then left outside in snow and ice,and not driven much for one year. Leak coming from sunroof tray which fills with water and appears to overflow. Looked at tiny drain holes (2) and seemed clear but not sure where drains are.
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Cadillac Mechanic about your situation and then connect you two.