Question about 2002 Chevrolet Silverado 1500HD

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2003 Silverado ac/heat blower does not work

2003 Silverado with automatic climate control blower does not run on any speed if set to recirculate. I only get air movement if I turn off recirculate and drive at speeds 20+ and the airflow increases slowly with speed but I have no control.

I do not have a 12v test light but have checked the voltage at the blower terminal using a multimeter set for 10vDC and the voltage does +/- when I adjust the fan control. is there a way to test the blower itself?

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  • myrag00_onli May 15, 2009

    I jumped the motor (literally). At first I just got a spark when I touched the wires, but on the third attempt the blower came to life. I reinstalled the blower and it seemed to be working properly as I adjusted the fan speed, however it did cut out and come back on a few times at various fan settings.

    I then turned off the truck for a few minutes and when I started it back up I still have air but the fan adjust no longer works.


  • myrag00_onli May 15, 2009

    Also to note, I removed and inspected the blower relay and this is some corrosion on the aluminum fins on the back side. Could this be a potential source of the problem?

  • myrag00_onli May 15, 2009

    I just took it for a drive with it set on Auto and everything seems to be working now. It does cut out briefly when the fans speed changes, but comes back on. If the problem gets worse then I will replace the blower relay.

    thanks for your help


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  • Chevrolet Master
  • 599 Answers

Yes make sure all the wires are off the blower motor and jump it to give it 12 volts if the blower works the problem is else ware. get back to me if you need more help,please don't leave bad rating get back to me and we'll go from there

Posted on May 15, 2009

  • Ray Keckeisen May 15, 2009

    yes as this is what controls the fan speed,need more help get back to me

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