Question about 1996 GMC Jimmy
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Posted on Jan 02, 2017
u will need to check the wheel speed sensors behind the brake rotors to see if they got damaged or disconnected during the brake job, as long as the ABS light is on the Anti-lock brake system is disabled, regular braking without the need of ABS will feel fine.
Posted on Apr 01, 2009
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
It's very possible to be the master cylinder, the o-rings on the piston could be worn, letting the fluid seep back through instead of getting full pressure through the lines. Could also be the brake booster.
Try changing the master cylinder first, which is cheaper and easier, and see if there is a difference, you'll need to bleed the brakes again.
To check the booster,
With the engine off, pump the brakes until the pedal is hard, then hold pressure on the brake pedal and listen for air escaping, or the pedal goes slowly to the floor, Do that after the master cylinder has been changed, at least that will be eliminated.
Posted on Sep 15, 2009
Testimonial: "Hadn't thought about the O-rings on the rod thanks for the idea. Great Idea Thanks!"
SOURCE: ABS Problem in my 2000 Jimmy 4x4
the best way to diagnose this problem would be with a scan tool while driving and watching the speed sensors, or check all your wheel tone rings make sure there are no cracks and they are clean, also have the computer scaned for abs codes there should be a code that may tell you which wheel speed sensor is acting up,you can also check the wiring, these seem to chaf the wiring by the control arm .a bad wheel bearing may also cause this problem, i would start with a scan of the abs system,good luck.
Posted on Feb 22, 2010
SOURCE: 2001 GMC Jimmy.
Under the hood there should be a fuse box, it's going to be one of the big fuses, had the same problem, 01 Tahoe. Found out it was a front bearing assembly. I replaced and it works fine now. Be carful as you will have no abs once fuse is pulled and FYI the abs light and break light will stay on as well. Good luck
Posted on Apr 05, 2011
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