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Q: Fan Speed on 1999 Chevrolet Express 2500

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I only have have high speed on my heater fan. How do I fix it?
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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try replacing the fan resistor. sometimes you may also have to replace the fan motor, but I would start with the resistor.
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