Question about GMC Cars & Trucks
Resistor 4 inop speed and possibly a poor to bad motor.
Posted on Oct 30, 2012
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Posted on Jan 02, 2017
The problem is most likely the blower motor resistor. I'm not sure where it is located on your vehicle, most are on the firewall under the hood or near the blower motor itself.
Posted on Dec 18, 2008
Check the cover for the environmental cabin filter. It is located on the far right side of the cowling right below the right windshield wiper. There are a few torx screws that secure the cover and then it pulls out to reveal the cabin filter. The cover (being poorly designed by VW) cracks and during rain the rain runs off the window and soaks the cabin filter. The water from the soaked filter then drips down into the blower motor and shorts out the resistor module at the bottom of the blower motor. The blower will continue to operate at full speed because it is operating on an open circuit without need for resistance for the resistor pack. There is a small access "panel" at the bottom of the blower motor you will need to remove in order to see the problem, you should see a frighteningly burned looking module in there. Good Luck! Hope this helps!
Posted on Nov 24, 2009
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