One problem related to brakes failed has been reported for the 1996 GMC Safari. The most recently reported issues are listed below.
My vehicle was moving about 10 m. P. H. In preparation to stop behind several vehicles at a red light. I applied my brakes in an attempt to come to a complete stop; however, the brakes failed to engage. I then put full pressure on the brake pedal. The pedal went down almost to the floor, but the brakes failed to stop the vehicle. As a result of this brake failure, my vehicle struck the vehicle in front of it which in turn struck a third vehicle. My vehicle was towed to a mechanic who was able to duplicate the failure. At this time however, he is unable to determine what is causing the failure.