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This was my question- I went to the dealership- there was mud/dirt on the fan. This made the car shake when the heater/air conditioner was turned on. All they did was spray the fan off with a garden hose. It works perfect now!

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โˆ™ 2005-03-14 19:14:49
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Q: What would cause a 2000 Sunfire to shake when the defroster is on?
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