den 10/26/2011

2000 Cadillac Catera Base 6Cyl3.0L - Brakes

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Why do I hear a hissing sound?

There is a hissing sound when I apply the brakes.

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  MasterTech 10/26/2011

  If you are hearing the sound inside the passenger compartment while you are braking, the problem could be in the power brake booster. It is a vacuum canister that can leak when bad. You hear the leak as a "hiss". The brake booster is located behind the brake master cylinder.

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