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1983 chevy. G30 brake.pedal sometimes hard as a rock, and slams brakes on

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Old Sep 18, 2024 | 2:57 PM
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Default 1983 chevy. G30 brake.pedal sometimes hard as a rock, and slams brakes on

Sometimes
not always. Brake pedal is hard. Hit it, and you better have your seat belt on. Brakes lock up.
I'm thinking it's a vacuum issue. But Guage says vacuum good.
Will guage show good vacuum if theres a leak ?
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Old Sep 18, 2024 | 11:56 PM
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G30... is it vacuum hydro-boost?
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