Abs system fail -life risk

[j cAT]

Originally Posted by roey

Thank you for your reply,
sounds very bad -if the GM knew\knows the ABS in the cars they sell\sold is "life risk" and avoid it !

As per your question : the breaks pedal just failed to floor , and after the engine was shut down and re started all came to "normal" and the pedal function normally,
Roey

ok so now we all know that this is a master cylinder issue. what I would do is replace the complete master cylinder assy .

what has been reported is the master cylinder on some of these vehicles is not the proper length and a tech at a fleet service repair shop posted this is why this happens but intermittent .

another cause would be contaminated brake fluid. remember brake fluid must be pure DOT 3 never use some other container always use the brake fluid container do not pour in in some other ... petroleum oils / mineral oils will damage the master cylinder and other brake components.

I use alcohol when I work the brake system for cleaning .

the ABS failing would cause a pulsing brake pedal . this is another GM failure caused by speed sensors that are made out of cheap chinese plastic crap. also mounted on steel that rusts heavily.most ABS failures occur at speeds below 10 mph.