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So I have 90' Cutlass Supreme with the Powermaster 3 hydro brake booster. The brakes are firm but when you take your foot off the pedal it does not return back far enough to turn the brake lights off. I was replacing the calipers and went to bleed them and pressed the pedal and I heard a snap. The brake light switch is fine and the hydro boost system is still working properly. Do I need to replace the whole booster? What do you all think? 

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