Loss of One or More HVAC Blower Motor Speeds on Chevrolet Trailblazer

The HVAC blower motor may stop working at one or more speeds due to a faulty blower motor resistor block. Our technicians recommend to confirm the resistor is at fault by first checking the operation of the switch.

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Average mileage: 109,073 (10,400–295,000)
7 model years affected: 2002, 2003, 2004, 2005, more2006, 2007, 2008
203 people reported this problem
126 people shared problem details
my a/c blower does not go off even when my key is out of the ignition. the temperature gauge goes from 80 degrees all the way down to 10 degrees and back up again intermittently. Now my a/c says it's on full blast but nothing is coming out of the blower at all.
when i turn on my a/c the engine cuts off an sometimes idle up an down then cut off
front Blower motor stays on with key out of Ignition.
Blower does not work at level 5. Only runs on levels 1 - 4. Replaced blower resistor and that solved the problem.
Speeds 1-4 work, #5 quit today, nothing at all. After reading reviews and some internet searches on different sites, I've narrowed the problem down to a faulty resistor and purchased one online through Amazon. I'll let you know if this is successful as with others to remedy the problem.
Rear A/C Heater doesn't work
Level 1,2,3,4 on A/c not working
Speed control #5 nor working.
Heater only worked on speed 4-5. Independent repair shop $55 part, $25 labor.
had to replace blower resistor myself
Mine does not blow air out unless it gets a suction. If I roll both windows down and then back up the heat/air will start working. I have also had the fan stick on high and not stop even after shutting the car off. We had to remove the fuse under the hood to get it to stop. I just read this and hope that changing the blower motor resistor under the dash will fix my issue too. If anyone else has had this problem and knows how to fix mine please help. Thanks
The HVAC fan will only run when it is set to 5.
started having problems with blower motor not working on 5, the cluster for the dash gages and the fuel cap started causing check engine light to come on all problems seemed to start happening right around the same time
only high blower speed had to replace speed resistor
My damage all happened when my door shorted out and caught fire in wiring from my blower and air conditioner. Burnt wires up from the blower and on. My front vents do not blow at all. This happened during the same time when my door controls stopped working. And it shorted out my fuel gauge Everything shorted out. And none of it still works all but my door. I took it back on recall....... sure wished GM stood up for there products.
The blower motor went completely out. Had to be replaced.
Bach AC/Heater fan does NOT WORK !!??
Levels 1-4 do not work. Only level 5 comes on for the heat. Also at times I can't leave it on for long because with it being on Kevel 5 it does this weird thing where my truck wants to cut off. I'm at 164,000 miles as of now. This happened earlier this year so I'm not quite sure exactly what the correct mileage was when it stopped working.
I repaired resistor once and fixed problem for a year now lost 4 and 5 again so ill have to replace again
Just today, I turned on the a/c on 3, while driving and it to blowing. Then to 4, then 5 and worked.
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