Hey Tuan: did you buy at Daughtery Hummer? That's where I got mine too!
My rear windshield wiper did leak as the reservoir was filled REALLY FULL. Use it a couple of times to take the level down, and it'll be fine. Don't overfill and it won't recur (hasn't for me) The bigger problem was that green stain left on the black license plate area of the tailgate. I used a plastic scrubber sponge GENTLY and got all the goo off, then used 2001 spray to return the black color. Worked like a charm. Almost five months with no more problems.
As for the AC, I've not had any trouble with loud fans, so I can't help there.
Kelley
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