My 97 Sierra when braking normally on (dry roads) will slow down properly, just before you stop, the brake pedal goes to the floor, and just before you rear end the dude in front of you they come back!!!! There is no trouble codes, no air in brake system... If I pull ABS fuse out, everything works mint!!! Also note, that this doesn't happen all the time!!!! Intermittent problem with consistant hair pulling!!!
ABS comes on all by it self at low speed braking, A GM defect with their brakes!!!! Sensor thinks the tires are locking up an puts on the ABS, my advice pull the ABS fuse the brakes work better!!!!! Sensor is **** never had a problem with my Honda's ABSI sent a letter to GM 0 response, never will buy one again!!!
I can say that my mother had a 95 or 96 z71 and she was having problems with tha ABS system ... light continuosly coming on... i dont know what my father went through exactly ... but i do know the final and resolute fix was the ABS box (computer) under the hood is was hte fix... dont think it was cheep but either way hope this helps or gets u close...
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Re: 97 sierra ABS problem
How do you know for sure there is no air in the brake system. You cannot bleed the ABS breake system in the same manner as a non-ABS system. I recommend taking this to a garage with ASE certified mechanics and have them diagnose the system problems for you. Brakes are essential to your safety and those around you.
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I need to know if the brake pedal gets tight or does the brakes get tight and slow vehicle down as if brakes are being applied.....If it is just the pedal getting tight and hard you have a vacuum Brake Power booster problem....If the brakes are locking slightly this could be a few different things......NEED MORE INFO..and Mileage....
There was a TSB on this issue with your Sierra, a faulty or dirty ABS sensor is the cause of this problem. The fix is simple, just clean the ABS sensor at the front hub with brake parts cleaner and inspect the wire leads. At worst you may have to replace the sensor it self. Good luck
Hi I'm litoshop if you bled the system and get no results then your brake pump needs to be replaced now before replacing make sure your pads are installed correctly because if there not this to can cause this problem good luck. if this information has been useful please let us know thank you.
There's speed sensors at each wheel. You may have got some contamination in front of one of them... sounds like the abs is trying to compensate for un equal speed at each wheel... and something may be blocking a proper read at one of the wheels...
The pulsating is the ABS system. It's actually pumping the brakes incredibly fast to even the braking to all wheels. There's sensors at each wheel and anytime it senses uneven braking, it's going to do this. You may want to pull the wheels and check the sensors and all of the connections and make sure there is no debris in any of the wheel sensor areas..
No, the pulsing is caused by warped rotors. Look at the inside part of each wheel to see if you're loosing brake fluid. If everything is dry, try bleeding the brakes and check you brake fluid level. If it still does it, remove the vacuum hose from the engine that goes to the brake booster and plug it. The pedal should be very solid. If it bleeds off still, replace the brake booster.