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blower does not work on any setting
Replace the motor, do it yourself quite easily hardest part was soldering the wire........we did. Got our part at Bumper to Bumper :)
Try the thermo-resistor under the passenger side dash.
Q&A > Chevrolet > 2005 Chevrolet Trailblazer
Q&A > Chevrolet > 2006 Chevrolet Trailblazer