The windows will leak around the weatherstripping in high wind and rain situations. I don't think there is anything you can do about it except watch which way the wind/rain is blowing and park your car directly into it or away from it. Any wind hitting from the side will force the rain past the weatherstripping. My 93 Pace Car got soaked on the passenger side while on vacation at the beach one year. The seat was soaked and so was the carpet. I also found 2" of water in the cooler that was closed and sitting on the back porch during the storm! That should tell you how wind can force water into anything.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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