I have a 2003 Monte Carlo ss. I currently have a water leak on the pillar on the front passenger door coming down and dripping onto the door and running to the floor. I also noticed water streak marks on the inside on my windshield. I am just wanting help on this as its driving me nuts.

 

Most likely it's the seal on your windshield if it's leaking down inside. Other possible causes, the door seal and the drain channel for the sunroof if you have one.

 

I do have a sun roof still have to look at the drain tube for it. Do you know where to get a new seal for the windshield?

 

You'll probably have to take it to a glass shop, so they can remove the windshield, reseal, then put the windshield back (or just get a new one if the cost is similar)