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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

HELP BRAKES 2000 suburban

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Old December 1st, 2017, 1:33 PM
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Default HELP BRAKES 2000 suburban

I have replaced all lines, rear calipers, and master cylinder, and pedal is very soft. The brake pedal will firm up when pumping a couple times when truck is off but as soon as you start truck pedal to floor. My mechanic has had it for 10 days and can not for sure it out! ANY HELP PLEASE!
Old December 1st, 2017, 1:57 PM
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Originally Posted by Esw1972
I have replaced all lines, rear calipers, and master cylinder, and pedal is very soft. The brake pedal will firm up when pumping a couple times when truck is off but as soon as you start truck pedal to floor. My mechanic has had it for 10 days and can not for sure it out! ANY HELP PLEASE!
You still have air in the lines, amigo. Yeah, its gonna take some work to get it all out, assuming that your system is closed.

What kind of mechanic are you dealing with? This is BASIC car tech, not rocket science. Air in system = Spongy brakes.
Old December 1st, 2017, 4:08 PM
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Did you bleed the master cylinder?




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