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?
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.
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.
Its soft, almost deflating sound
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.
same problem 1997 sub but the brakes are soft and slowly go to the floor
thats chevy suburban anyone out there know if its the brake booster
the air sound like its inside the truck when u press the brakes
is there a suburban person out there
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The pedal isnt hard though, it doesnt go to the floor but not yet
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