Used a C-clamp to push the caliper pistons back

UPMM019

MEMBER
2004 GMC ENVOY
130,000 MILES

I did front and back with new rotors and pads, etc. After the job I could not tell much difference between the old and new brake set up.I was expecting that the foot brake would be more firm and less like it has been which to me is a bit soft / spongy. I didn't open the bleeders at all. I basically opened the bake fluid reservoir while working and used a C-clamp to push the caliper pistons back. I am wondering if I bleed the brakes out if that may help?

Sunday, September 15th, 2013 AT 8:58 PM

5 Replies

SATURNTECH9

MECHANIC
30,869 POSTS

I would suspect there is air in the lines. These guides can help you fix it.

https://youtu.be/w7gUsj2us0U

and

https://youtu.be/WDxvEQrMkBg

and

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

Please run down these guides and report back.

Was this

answer

helpful?

Yes

Sunday, September 15th, 2013 AT 10:05 PM

UPMM019

MEMBER
217 POSTS

There was air in the ABS module I got a scanner to open the valves all fixed thank you.

Was this

answer

helpful?

Yes

Monday, September 16th, 2013 AT 6:30 AM

RMACMILLAN

MEMBER
1 POST
2002 GMC ENVOY
3.6L
4WD
AUTOMATIC
182,000 MILES

I have a pedal that goes to floor when the engine is running. I have replaced master cylinder, ABS module, ABS modulator, all 4 calipers, brake booster. I have tried using a code scanner tool that has the ABS bleeding and the pedal is still going to the floor. I have bleed the brakes several times, used about 6 quarts of fluid. There a no leaks so run out of ideas

Was this

answer

helpful?

Yes

Sunday, April 25th, 2021 AT 10:43 AM (Merged)

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

In the diagrams down below I have included the factory diagnostic troubleshooting guide for excessive brake travel for your vehicle. It might appear to all over the map, but it is in order, and when it goes from one thing to another, you are meant to skip to that sub inspection. Please go through the guide, in order, and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros

Images (Click to make bigger)