Question about 1990 GMC Suburban

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Heater bower not working - 1990 GMC Suburban

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This question is asked so often it should be common answer by now. Check fuse, then ballast resistor (located under hood on heater box), then run hot wire directly to motor for quick test if motor is bad. If everything checks out good, bad heater switch is only thing left.

Posted on Jan 13, 2015

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Posted on Jan 02, 2017

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