It can be one of 3 things. My first guess would be a leaking heater core considering the area where it is leaking. Are you sure this is water and not coolant. If it tastes sweet or is slick to the touch, it is coolant and you have a leaking heater core that must be replaced. Secondly it can be the windshield seal that is leaking. And 3rd it may be that the drain holes below the windshield cowl are stopped up allowing water to enter the passenger compartment.
hater core is bad
defrost or a/c compartment under the dash
Most likely a leak in the heater core, should be on the passenger side under the dash.
Windshield seal? Heater core? Evaporator drain?
check your blower motor, located under the dash board. its on the passenger side. if the leak is on the drivers side, i have no clue. but my hubby's car is leaking water from the blower motor on the passenger side. found out at the car wash...
Probably on the passenger side, under the glove box. The heater core is leaking, you should probalbly smell something sweet with the car running. That's the anti freeze.
I had a Chevy van of this vintage and I found a vacum hose leak in the controls that would make the heater/defrost door default too defrost open. lisining carefully under dash or under hood may pinpoint leak. I had a Chevy van of this vintage and I found a vacum hose leak in the controls that would make the heater/defrost door default too defrost open. lisining carefully under dash or under hood may pinpoint leak.
If you have the electronic climate control system it most likely is a Vacuum Hose leak Start under the hood on Passenger side and replace all hoses from canister to under the dash this should help. With a Vacuum leak it defaults to defrost mode
You most likely have a heater core that is leaking.
Check for vacuum leak either under hood or under dash Check for bad vacuum actuator under dash
Anti-freeze? Coolant fluid? That's bright green.
not any oil in your heater core although the heater core uses coolant coming from and returning to the engine so when damaged or being worked on coolant can leak under the dash and into the floor