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Blower fan motor works on high speed only

Tiny
PWESTON429
  • MEMBER
  • 2003 GMC YUKON
  • 135,000 MILES
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

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Wednesday, July 3rd, 2013 AT 5:07 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 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.
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Wednesday, July 3rd, 2013 AT 7:20 AM
Tiny
PWESTON429
  • MEMBER
  • 2 POSTS
Ok so where is the blower motor
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Wednesday, July 3rd, 2013 AT 7:36 AM
Tiny
HMAC300
  • MECHANIC
  • 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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Wednesday, July 3rd, 2013 AT 8:01 AM

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