brake pedal go to the floor on a 2001 gmc hd

Asked by Sep 29, 2015 at 07:15 PM about the GMC Sierra 2500HD Classic

Question type: General

I have put a caliper on right rear and replace to lines and bleed the hole system pedal still gos to the floor and the rear tires will catch and fronts don't catch and I got pure fluid but not much pressure

4 Answers

Master cylinder problem and/or Proportioning valve. That is the device that if your master cylinder fails in one stage you will still have brakes. Some cars it will apply brakes to front some to rear.

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as such

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or

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82,105

FordNut, what about air in the ABS system, if so you need a scan tool that plugs into the USB port capable of interacting with the computer of the car, to bleed out the ABS system.

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