Brake Master Cylinder problems of the 1997 GMC Suburban

Master cylinder had failed 3 times within 1yr. The abs brakes failed to stop vehicle when applied. At dealership at least 8 times for problem. They fixed the brakes each time & they always failed. An ongoing problem. Brakes are still not working appropriately.

When the brakes are applied the vehicle pulls to the right. Owner has had the passenger's side brake rotors , and the master cylinder replaced twice. The dealer and the manufacturer have been notified.

Vehicle pulled to the left when applying brakes , went to dealer, replaced brake master cylinder. After this repair, defect was still occurring which resulted in an accident, causing the consumer to rearened a another vehicle at approx 40-45 mph. ,brakes completley faile. ,no abs warning light. Driver's and passenger's side air bags did not deploy.

Abs brakes failed, vehicle lost control, resulting in a crash/injuries. Dealer also replaced master cylinder.

Abs brake problems; on dry road conditions, applying the brakes in a normal manner, and the pedal went to the floor. Driver used emergency brake to stop vehicle. Continued home using the emergency brakes. The abs control unit was leaking and was replaced on 11/17/97, along with the master cylinder.

Abs brakes do not and have not worked properly since this vehicle was first purchased (still original owner). Speed sensitive steering does not and has not worked properly as well. Thousands of dollars $$$ have been spent at the original dealership and at qualified automobile service repair centers continually replacing parts and sometimes the same parts of the years, this continues to this day even though the Suburban is in excellent condition and well taken care of. This includes master cylinder, brake pads, cylinders, etc. This braking defect seems to be experienced by many owners of the 1997 GMC Suburban c1500. Why hasn't something been done by gm engineers to locate and fix this problem?.