OLDS 97 REGENCY - wet interior issues. What do I do to correct this?

"I had an underside inspection and there are no cracks or gaps in the underside,floor boards, either inside or outside. The mechanic said it could be the rear window or wind shield leaking? I hope not, because I dont know how to fix this, if this is the problem?" "I had an underside inspection and there are no cracks or gaps in the underside,floor boards, either inside or outside. The mechanic said it could be the rear window or wind shield leaking? I hope not, because I dont know how to fix this, if this is the problem?"

Did the mechanic or you check under the dashboard ? Any signs of leaks either driver or passenger side floor ?
What parts insider your car are wet or have water ? Did the mechanic or you check under the dashboard ? Any signs of leaks either driver or passenger side floor ? What parts insider your car are wet or have water ?

I would recommend you remove the wiper blades and then open the hood. Then you need to remove the plastic cover that runs along the bottom of your windshield from driver to passenger side. This will give you access to the wiper motor and along the edges on both sides you have drain holes that allow water to drain to the ground. Many times, these holes are covered with dirty and leaves which do not allow water to drain and enter the car behind the dashboard. I would recommend you remove the wiper blades and then open the hood. Then you need to remove the plastic cover that runs along the bottom of your windshield from driver to passenger side. This will give you access to the wiper motor and along the edges on both sides you have drain holes that allow water to drain to the ground. Many times, these holes are covered with dirty and leaves which do not allow water to drain and enter the car behind the dashboard.