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Any helpful information/advice is appreciated. I'm the owner of a 2008 G6, with sunroof. My a/c hasn't been working all summer. I tried adding freon, but after a day, I was back to no a/c. I realize that I have a leak, I just don't know where it is. In addition, every time that it rains, my front passenger side floor gets soaked, and it's coming from under the dashboard on the passenger side. Please help.
 

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I believe the sunroof has drain tubes that can become blocked or broken. There appear to be a few youtube videos on this that would give you pointers to fix it.

For the AC, do you have caps on the high and low ports? Sometimes the Schrader valves can leak. You can also get refrigerant with UV dye to help you spot where it is leaking.
 
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