What is your question?
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What is your question?
It happens always in heat and cool mode thanks for any input and thanks for your time
1 Reply
Napa has 4 different blower motor resistors available for your GMC and usually if the fan only works on high then the resistor is bad, you can see them here http://www.napaonline.com/Catalog/Result.aspx?Ntt=blower&Ntk=Keyword&Nty=1&N=599001+102004+50030+2030042 and about 1/2 hour to replace this