Brake pedal went to the floor

1998 CHEVROLET SILVERADO
280,000 MILES • 5.0L • V8 • 4WD • AUTOMATIC
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BIG DALE IRWIN
  • MEMBER
  • 1 POST
I backed out of a parking lot then put it in drive started to ease off the brakes and heard a loud bang sound like something broke. Turned back in the parking lot and the brake pedal went to the floor. So, I changed the master cylinder and the brake booster. I've bled it a lot. I know I still have some air in the brake system. When I tried to test drive, I can build up enough pressure to stop. When I turn a sharp right or left the pressure, I built up goes completely out. it does stop the truck but not until it gets almost to the floor.
Mar 5, 2022 at 5:01 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning,

You need to bleed the ABS module to get rid of the air. You need a scan tool for this. You cannot bleed it manually.

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

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

Let me know if you have any other questions.

Roy
Mar 5, 2022 at 8:33 PM
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