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could be several things. 1st is the car actually overheating. If so then it could be a stuck thermostat or a bad water pump. If it is not really overheating my bet would be a falty temp sensor. The temp sensor is what actually tells the light to turn on.

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โˆ™ 2004-06-12 07:44:30
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Q: What would cause the Temp light to come on in a 91 Chevy Lumina?
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