Start truck brake pedal goes to floor

Tiny
FAITH70
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 210,000 MILES
Have new booster and master cylinder have bled brakes over and over even auto bled ABS pedal. Good until I start truck then goes to floor.
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Saturday, April 27th, 2019 AT 1:11 PM

3 Replies

Tiny
SCGRANTURISMO
  • EXPERT
Hello,

Okay, you either still have air in the lines, or more than likely you have a leak somewhere. Double check all your brake lines with an assistant pressing the brake pedal. You should be able to find it. I have included a link below for you to go to.

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor

Please get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Saturday, April 27th, 2019 AT 1:22 PM
Tiny
FAITH70
  • MEMBER
Ty how likely is it that a vacume supplemental assist pump goes bad
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Saturday, April 27th, 2019 AT 7:26 PM
Tiny
SCGRANTURISMO
  • EXPERT
Hello again,

I am so sorry. I thought somebody named Ty answered your question and hadn't answered back, so I assumed you had it fixed. My bad, I apologize. Okay, when I was doing a little more research on your vehicle I came across this Technical Service Bulletin(Recall) for your vehicle. I have included it in the diagrams down below. I do not see an expiration on it anywhere, so it is probably still good. Go through it and give your local dealer a call. You might be able to have them fix it for free. Get back to us with what they say. If not, we will just go from there.

Thanks,
Alex
2CarPros
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Monday, April 29th, 2019 AT 11:03 PM

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