Question about 2005 Chevrolet Trailblazer Ext

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2005 chevy trailblazer, fan switch wont work on all speeds

At first the a/c fan was fine, but then the 4th and 5th speeds wouldnt work, and now the a/c heater wont blow at all, fuses are fine? any help?

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Had the same problem on my 2005 trailblazer I replaced the resister and wire harness because wire harness was burnt on a few connections. Cost was 75 bucks for both parts at Napa auto parts works fine now

Posted on Nov 23, 2009

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CRUISE CONTROL WON'T WORK ON 2005 CHEVY TRAILBLAZER


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I have 2005 chevy trailblazer heater wont work,


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Jan 21, 2009 | 2005 Chevrolet Trailblazer Ext

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Hi 4th &5th fan speed heat ,cold not run


i had the same problem with a 2005 trailblazer. the problem was in the connection at the blower motor. the wiring harness was loose and not making a good connection. this harness is kind of hard to reach. it is located on the passenger side all the way to the right and up behind the dash. what i did was take the harness loose, and replace the end of it then plug it back in and have had no problems with it since.

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