Question about 2004 Chevrolet TrailBlazer

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When i try to go down the road there is a weird sound coming from the engine area, sound like it sucking for air. Initially when my wife was on her way home from school, she made it to the stop light then it would not go anywhere. I found P0128 code and replaced the thermostat. Now it will not go. The spark plugs, fuel filter, trans filter has all been changed. Im at a lost.

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  • btm88tc May 08, 2010

    you can only hear it if you are trying to go forward from a stop

  • btm88tc May 09, 2010

    I tested it with the gas cap off and there was no change. It sounds like it is missing, has lack of power.



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Intake sucking air or vacuum leak get a can of starting fluid crank the engine spray where you hear the sucking sound the most if the engine speeds up that s were the leak is

Posted on May 08, 2010

  • bloodyknuck1 May 09, 2010

    remove the gas cap and try driving it



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