Question about 2004 Chevrolet TrailBlazer

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04 Chevy Trailblazer HVAC Blower Problem

I have an 04 Chevy Trailblazer and I am having trouble with the HVAC blower. The car has Auto / Dual Climate Control. The blower will come on sometimes and sometimes not, mostly not. Sometimes it will stay on after I shut the car off. I have to then pull the blower fuse and wait a few seconds then it stays off. Sometimes if I play with the Mode, Auto, Off, Blower Speed Switch and the Temperature Setting Knob I can get it to come on. I believe that it is is in the main control unit itself but I am not sure. Is this something that is common? Is it worth it to buy a dealer new unit or would a salvage unit be a good gamble?

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  • 04_chevytb1 Jan 13, 2009

    I replaced the blower relay module today and it fixed the problem.

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This is the first time I have heard of this problem. It's not to say it's not common. Try the salvage yard first obviously cause its cheaper. If problem presists contact the dealer for advice.

Posted on Jan 27, 2009

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