1992 Chevy Blazer Brake pedal goes to floor

1992 CHEVROLET BLAZER
87,000 MILES • 6 CYL • 4WD • AUTOMATIC
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MRBILL2008
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Brake pedal goes to floor on stopping after hitting a bump. Could not find any leaks in system. ABS and brake light on. Replaced master cylinder thinking internal bypassing. Bled brakes and got a stiff pedal. Started truck and same thing lights on and very low pedal. is this an internal ABS problem, or is there a certain way to bleed this truck because of the ABS?
Sep 26, 2008 at 12:28 PM
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RASMATAZ
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You bleed the ABS after the master cylinder then the wheels.
Sep 26, 2008 at 12:39 PM
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MRBILL2008
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Ok trying to bleed out the ABS system and only get fluid out of one of the bleeder screws on top of the abs unit. master cylinder is bled properly. Is this abs unit the cause?
Sep 29, 2008 at 1:46 PM
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RASMATAZ
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What do you have on the back-Drum or Disc?No leaking on the wheels could be a bad new master cyl.
Sep 29, 2008 at 2:44 PM