One problem related to brake pedal and linkage has been reported for the 1996 Chevrolet Lumina. The most recently reported issues are listed below.
Have a knocking or clicking on both rear tires while driving at slow speeds, lees than 10mph the noise happens in forward or reverse. Another problem is the brake pedal feels very spongy while braking, however the car has been stopping when needed to. It just seems odd to have to push the pedal so far down toward the floor, and still fell mushy.