I have the SUV listed above it is a 1500 with over three hundred thousand miles. I recently started having problems with the brake pedal sinking to the floor. This problem seems to be more noticeable when I am stopped (at a traffic light) and holding. I first tried to bleed the brakes, but this had no effect. I changed out the master cylinder (re-manufactured), bled the brakes and still have the same problem. I also had to install a new front caliper, because the bleeder bolt would not come out of the old one. The truck seems to stop okay, but has a soft pedal. If I press on the brake pedal quickly, I can hear a "woosh" noise. I do not know if I got a bad master unit or if I have a bad vacuum booster as well. Any help would be appreciated. Thanks.
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Friday, August 5th, 2011 AT 5:20 PM