Question about 2005 Buick Park Avenue

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Sunroof leak The sunroof on my 2005 Ultra leaks after even moderate rain. It seems that the drain holes on either side must be clogged, as the leaking occurs as accumulated water overflows the lip and saturates the roof liner. Where do these drains take the water to, and how can I unclog them?

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There are drain hoses on all all four corners of the sunroof. to access the front ones, remove the front inner fender liners. you'll probably see a plastic grommet/spout that the drain hose attaches to. in the rear, remove the trunk liners on the side. you should see the drain hoses running down the inside of the quarter panel.

Posted on May 25, 2009

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Pour in some hydrogen peroxide to clean out the clog

Posted on May 25, 2009

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