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

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: 91,234 (53,000–145,000)
7 model years affected: 1995, 2000, 2001, 2002, more2003, 2004, 2005
19 people reported this problem
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problem details
2002 Chevrolet Blazer 53,000 mi,
Blower does not work at all speed settings.
Fan running fine one day not the next day. It turned out to be the fan motor itself. Mercifully, it's not that hard to replace.
1995 Chevrolet Blazer 98,500 mi,
heater air switch only works in 3 low speeds I pulled fuses out several were rusty.cleaned them off and clicked on and off so i checked the relay it seems to be going out after tapping on it high speed turns on for the first time in years....I am going to replace the relay Now it is the one closest to the air unit on the firewall..good luck.
2005 Chevrolet Blazer 116,000 mi,
The dash vent blower does not work for the two hihest speeds. I think it is the switch assembly, but don't know.
Blower Motor only functions on hi...dealer diagnosed and repaired problem
2003 Chevrolet Blazer 61,000 mi,
Blower only worked in the high positiom