My 98 Silverado has brake issues. I understand a full brake pedal when not running but cannot understand why brake goes to floor when running. This is after module was changed ,new brake lines, calibers and two master cylinders . spent several days in GM garage. computer diagnostic and computer bleed. I did a brake line by-pass of abs module and went direct to wheels still brake goes to floor. Complete bleeding new rubber flex lines and no result. Any takers would be greatly appreciated.


Thanks in advance

 

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