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<blockquote data-quote="Einzee" data-source="post: 6069919" data-attributes="member: 556176"><p>Sounds like a vacuum power booster. Its that big round thing that your brake master cylinder is attached to.</p><p></p><p>I'd double check all of the hose connections under the hood and pay particular attn to the large one that connects to the booster. Consult the vacuum diagram sticker that is usually under the hood on GM's.</p><p></p><p>An easy way to test the booster is to press the brake pedal down several times while the engine is not running. Keep pressure on the pedal as you start the engine. The pedal should drop down 1-3 inches when the engine starts. If all vacuum connections are correct and the pedal does not drop then your booster is most likely defective.</p></blockquote><p></p>
[QUOTE="Einzee, post: 6069919, member: 556176"] Sounds like a vacuum power booster. Its that big round thing that your brake master cylinder is attached to. I'd double check all of the hose connections under the hood and pay particular attn to the large one that connects to the booster. Consult the vacuum diagram sticker that is usually under the hood on GM's. An easy way to test the booster is to press the brake pedal down several times while the engine is not running. Keep pressure on the pedal as you start the engine. The pedal should drop down 1-3 inches when the engine starts. If all vacuum connections are correct and the pedal does not drop then your booster is most likely defective. [/QUOTE]
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