Question about 2004 Chevrolet TrailBlazer

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2003 Chevy Trailblazer my AC blower won't turn off!

I have a 2003 Chevy Trailblazer and now my AC blower will not shut off. You can turn the car off and walk away, but it will not stop. We have taken the fuse out to make it stop. But what could be causing this?

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You have a short to power which will cause it to stay on constantly check your blower motor resistor pack to ensure that it is working and check the wires going to the blower to make sure you have a power and a ground

Posted on Jun 29, 2009

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Got a 03 trailblazer. Blower motor will work when key is turned to start position but won't work when vehicle is started. Tested the resistor with a 12 volt tester

Posted on Jan 05, 2016

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SOURCE: 2003 Chevy Trailblazer AC won't turn off

blower motor control module under right side of instrument panel next to blower motor

Posted on Nov 27, 2009

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sounds like a blower motor relay or control module. have it check first with your mechanic as the part for your car is expensive. goodluck

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The throttle body needs to be cleaned, grime in this area prevents the throttle plate from closing completely and allowing air to enter, making the air/fuel mixture lean. Make sure to clean the front and back sides of the throttle body. Also, disconnect the battery during the cleaning process to allow the computer to reset and relearn to the cleaned throttle body.

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My 2003 chevy trailblazer makes a noise like pressure is releaseing as soon as turn the car off, What is this?


It is probably just your air conditioning. If you have your defrost on it also runs your ac pump. So if you have your ac or defrost on and you shut the vehicle off you will hear a hissing noise for about 10 seconds or so which is normal.

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2003 Chevy TrailBlazer..bad rattling under truck and feet.


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2004 Chevy Trailblazer, At first you could only get the air conditioning to switch on by turnning the vehicle off and switching over to AC. Now the AC will not come on and it is always blowing hot air out...


Could be your main blower motor resistor, mine would still run the fan even after shutting off the vehicle.(safari van) Had to unplug the resistor to stop the fan,it was near the blower under the hood. Bought a new one for about $45 bucks. Replaced it and all is fine. Might want to check relays first, sometimes they stick and need replacing.
Good luck.

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2003 Chevy Trailblazer AC won't turn off


Check on and off switch it may be defective.

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