Re: Unable to stop due to abs and my truck seems lower on...
I had the same problem with my 2003 Chevy Trailblazer. If I can remember correctly it was my wheel bearings along with something else. But It cost me 800. But take it to the shop and have them take a look at it.
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Sounds like a fault with the Antilock Braking System. The vibration in the pedal is the ABS working. With your foot on the brake pedal, it releases and re-applies the brakes to stop a skid from the wheels locking up. You need professional service for brakes.
Seems to be a known issue on all Cadillac and requires the ABS module to be replaced.
the ABS is a system that allows wheels that have stopped turning under brakes to turn again momentarily
the brakes work through the abs system normally at all times from the booster and it is only when a wheel stops turning that the electric motor in the abs unit provides pressure to a line to compensate for the fluid returned by the valve in that line that was opened when the wheel stopped
you can disconnect power to the abs ( fuse ,relay) and the brakes will still operate normally except that when in extreme braking situations the wheels will lock up and steering control will be the same as pre abs cars ( side skid and not able to steer around an object)
there may be a abs light come on but you will have to live with that
best talk with an accredited brak specialist shop as they may have an idea as to what can be done to bypass the abs
remember that the abs is part of the vehicle safety requirements and in by passing it or making it inoperable you may be making the vehicle un-roadworthy for the purposes of inspection and insurance.
take it to an accredited brake specialist shop
I suspect that the brake booster is becoming defective and the small application to the pedal causes excessive booster reaction
the abs section only maintains applied brake fluid pressure as set by the position of the pedal
that is to maintain the pressure as the stopping and start movement of a skidding wheel opens and closes a valve to that wheel /s
if you are on ice that sudden hard braking will cause the wheels to lock and immediately the abs cuts in to allow the wheels to turn and then to allow brake action to be reapplied
if the abs is working under brakes you will get a pulsating feeling under your foot as the fluid pressure is alternation between full on and released by the abs valves
I suspect you have some loose connections or shorts in the wiring harness. I've had similar strange things happen with an Olds Bravada. Various transmission shifting problems, faults, etc. that all seemed to come from the engine's computer system getting incorrect voltages and readings due to wiring faults/shorts.
There's a service bulliten about that problem with rust build-up on the front hubs pushing the sensors out of posistion [ most common on the pickups in areas that use road salt ], it happens mostly at very low speed. The best way to find out the problem is to have the system scanned.
Its the abs sensor, if you encounter an ice patch or snow you won't even be able to stop because the pedal will will push back and make the rip grind noise. If you pull the ABS fuse out, you won't have ABS but you can stop and you won't have the grind noise and back pressure for now. Its safer to not have ABS when the sensor is faulty.
REPLACE THE FLEX ABLE BRAKE LINE ON THE WHEEL IN QUESTION THE RUBBER ON THE HOSE IS SEVERAL LAYERS THICK AND PRESSURE CAN BUIELD BETWEEN THE LAYERS NOT ALLOWING THE BRAKE TO RELEASE AS NORMAL , THIS CAN BE CHECKED BY JACKING WHEEL OFF GROUND HAVE SOMEONE TO PUSH DOWN ON BRAKE HARD AND LET UP IMMEDIATELY WHEN THEY RELEASE YOU TRY TO TURN THE WHEEL SEE IF THE BRAKE APPEARS TO BE HOLDING , WAIT TEN MINUTES AND SEE IF IT APPEARS TO BE FREE IF SO REPLACE HOSE IF BRAKE STILL HAS IT YOU COULD HAVE OTHER PROBLEM . NOTE THIS IS A FT WHEEL DRIVE I KNOW WHEEL WILL NOT FREEWHEEL BUT YOU STILL SHOULD BE ABLE TO TELL IF BRAKE IS LOCKED IN TEST GIVEN