Blower fan motor works on high speed only

2003 GMC YUKON
135,000 MILES
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PWESTON429
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  • 2 POSTS
at first the fan would only blower at high speed but know it sometime does not work at all
I found the answer that it the resistor located in the heater plenum where is that in my truck
or could it be something other then that I could it be the switch

Jul 3, 2013 at 5:07 AM
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HMAC300
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  • 48,601 POSTS
check the harness goin gto the resistor, they are a problem and it burns up the resistor as well as harness. they are right by the blower motor, if you need a new harness its about $120 for resistor an dharness for gm parts direct .com the harness is all white though and larger wires so will have to be put in correctly.
Jul 3, 2013 at 7:20 AM
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PWESTON429
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  • 2 POSTS
ok so where is the blower motor
Jul 3, 2013 at 7:36 AM
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HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
on the passenger side you may have a shield over it and resistor is right there
relay may be in underhood box
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Jul 3, 2013 at 8:01 AM