Question about 1997 Chevrolet Suburban

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Air pressure sound when i push on the brakes - 1997 Chevrolet Suburban

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  • mzteelampley Sep 30, 2010

    The pedal isnt hard though, it doesnt go to the floor but not yet

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  • Chevrolet Master
  • 6,826 Answers

Air pressure sound may come from a leaky vacuum hose or bad check valve at the booster or master cylinder.

But, I think that it's normal to hear a soft hissing sound when depressing the brake pedal which comes from hydraulic fluid going through the passage ways.

Is the pedal hard?

Posted on Sep 30, 2010

  • 6 more comments 
  • mzteelampley Sep 30, 2010

    When I push on the beakes, it sounds like air is going in. the brakes are not hard but sometimes squeal when i come to a stop.

  • Duane Wong
    Duane Wong Sep 30, 2010

    Would you say the 'air' sound is loud, medium, or soft?

    Squealing of the brakes can be normal as long as the vehicle does come to a 'sure' stop.

    Squealing can be eliminated by using different brands of brake pads, such as Wagner brand brake pads that are known for having a quiet stop compared to some other brands.

  • mzteelampley Sep 30, 2010

    Its soft, almost deflating sound

  • Duane Wong
    Duane Wong Sep 30, 2010

    I have had several cars that seem to have that soft deflating sound when depressing the brake. I think that this is normal as long as the pedal is hard and the car stops surely.

  • justin lieber Oct 23, 2012

    same problem 1997 sub but the brakes are soft and slowly go to the floor

  • justin lieber Oct 23, 2012

    thats chevy suburban anyone out there know if its the brake booster

  • justin lieber Oct 23, 2012

    the air sound like its inside the truck when u press the brakes

  • justin lieber Oct 23, 2012

    is there a suburban person out there

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