After replacing all four brake calipers the brake pedal goes to the floor

2007 CHEVROLET IMPALA

140,000 MILES • 3.5L • V6 • 2WD • AUTOMATIC

ROBERTCRAWFORD

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I just replaced all four brake calipers and bled all brakes several times. no air in the lines, no brake fluid leak, the brake booster is fine. The master cylinder is fine. The old calipers worked perfectly the pedal goes to the floor only when running.

Jul 4, 2022 at 1:27 PM

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SQM

AUTOMOTIVE REPAIR CONTRIBUTOR
6,383 POSTS

Hello,

These ABS systems require a scan tool to bleed the brake system properly.
As air usually gets trapped in the valves of the ABS system and to get the air out you will need to use a scan tool to open and close the valves.
Take a look at his helpful video, it shows the process:

https://youtu.be/nQRnKyVyMuQ

I have attached the vehicle specific bleeding procedure below for your reference.

Let me know of any questions.
Thank you.

Images (Click to enlarge)

Jul 5, 2022 at 8:57 AM