Question about 1999 GMC Suburban
This vehicle has done this since we owned it an abs light is not on but when removing master cylider front brake line on it had pressure still on the line
I would presume this is a potential issue with the master cylinder not allowing fluid to return to the reservoir.
If the ABS had an issue, then the issue would likely be between the ABS unit and the brake unit.
Posted on Nov 06, 2012
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Posted on Jan 02, 2017
SOURCE: no brake pressure
There IS one place it can still leak. behind the brake master cyl - into (inside) the power brake vaccum booster, although that doesn't seem the problem. You first need to make sure your master cyl is bench bled. with a hose bleeder kit, you can bench bleed in-car. you should be able to bleed sys through abs sys with no problem. Sounds like the master cyl needs to be re-bled.
Posted on Jun 03, 2009
go to this site, it is for a 99 jimmy but the procedure is the same. www.handymanlyness.com/archiv...99 jimmy.html this will show you the basics. have a good day !!
Posted on Mar 24, 2011
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Fig. 1: Loosen the front brake line in order to bleed the master cylinder
Fig. 2: Connect a bleed hose from the bleed valve on the front caliper to a jar of brake fluid
Fig. 3: Always follow the lettered sequence when bleeding the hydraulic brake system
Hope this helps to solve it; remember to rate this answer.
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