leaking water on passenger side

you eather got a stoped up drain hose for the AC or a leaking heater core.

it leaks when its rains

your windshield is eather leaking through the factory seal or the rubber on the pass door is leaking,sit in it and have someone spray it with a waterhose,you should be able to see where it is leaking.

The Vent is allowing water in when driving or heavy rains. I have the same problem. It is on the top by the windshield wiper blades and it is cracked or missing.

The actuator door on your air condition can be stuck on heat and when the water comes in through the vent it does not allow the condensation to flow out of the air condition condenser drain hose fast enough

What does it mean when your Chevy Tahoe heater stops working and you noticed your leaking water but you're not sure from where

The antenna on top is not sealed properly and when it rains hard it leaks. Mine is coming through the headliner by the visor