Question about 2002 GMC Envoy

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Gmc sierra blower switch

I have no air flow,heat or ac,the switch does not work, I checked the fuses, power to the blower motor and the blower motor and they work???

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Last place to look is the resistor block located in the duct work for the blower (fan). it should have a wiring plug going to it and be held in by a couple screws. look on the passenger side near the fan itself.

Posted on Sep 03, 2009

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  • 2 Adjust the climate controls. If they are working correctly with the right amount of resistance and stopping at the right places but have no effect on the air then it is probably a simple fuse problem. If they are not working correctly then it is probably a control panel issue.
  • 3 Get to the fuse box to change the blown fuse in a GMC Sierra by opening the driver's side door and prying off the trim panel to the left of the steering wheel. The fuse can be removed with your fingers. If the Sierra was purchased new there should be replacement fuses in the fuse box.
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