Service Brake System light

[BOFA]

Hi everyone, new to this forum but I can’t find an answer to my issue anywhere
I have a 2005 GMC Yukon XL 1500. Recently changed all 4 calipers, flex lines and new master cylinder.
Everything has been bled and the pedal is firmer than ever.
However the service stability/service brake system light is came on after the job.
The warning disappears if I unplug the master cylinder level sensor.
Anyone run across this issue?
Thanks in advance for the help!

 

[Doubeleive]

Hi everyone, new to this forum but I can’t find an answer to my issue anywhere
I have a 2005 GMC Yukon XL 1500. Recently changed all 4 calipers, flex lines and new master cylinder.
Everything has been bled and the pedal is firmer than ever.
However the service stability/service brake system light is came on after the job.
The warning disappears if I unplug the master cylinder level sensor.
Anyone run across this issue?
Thanks in advance for the help!

either the fluid is low or the proportioning valve is stuck, my Silverado recently did the same thing, I was going to have to bleed the rear brakes slowly but a couple days later it actually corrected it's self. so you can try driving it and giving it some good hard brake (like emergency stopping) that may correct it or just drive it a couple days and see if it corrects it's self or try bleeding the rear brakes again slowly