Replaced the ABS module and Master Cylinder, the brakes still no brake pedal?

Tiny
YUDIMI
  • MEMBER
  • 2013 CHEVROLET IMPALA
  • AUTOMATIC
  • 140,000 MILES
Changed ABS module and master cylinder and still no brake pedal.
Tuesday, February 21st, 2023 AT 9:53 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,949 POSTS
Did you have no brake pedal before you started? Or after? Also did you bench bleed the system before you installed it? Either way it sounds like there is air inside the brake ABS system which needs to be removed to get your pedal back. This must be done with a scan tool.

Please check out this video below:

https://youtu.be/nQRnKyVyMuQ

The only other thing that can be causing it would be a brake caliper that is frozen on its slides, so please remove the tires and inspect the slides.

This guide can help as well:

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

Please go over these guides and report back.
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Tuesday, February 21st, 2023 AT 3:35 PM

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