Question about 1999 GMC Sonoma

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Blower not working on setting 1 or 2

I have a 1999 GMC Sonoma 4.3 V6.. The heater fan is not working on setting 1 or 2, but works fin on 3 and 4.. How do I get all settings back?

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  • Anonymous Jan 18, 2009

    Mine only works on 2and 3. Havent tested it yet but think its likely the resistor.



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  • 6 Answers

It sounds like the fan speed switch ...but im no expert

Posted on Jan 02, 2009


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1 Answer

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