Two problems related to brake antilock control unit/module have been reported for the 1999 Chevrolet Cavalier. The most recently reported issues are listed below.
Brake light and abs lights are on. The abs motor pack needs to be replaced, and was told by mechanic that this is a frequent problem. Bad motor pack due to corrosion in gears in motor pack. This causes abs to "shut off" but also for brakes to drag, stick, premature break wear, and warped rotors. Many people have this issue. Newer design of motor pack consists of electronic solenoid. Chevrolet needs to recall this.
While driving 55 mph driver applied the brakes and brake pedal went to the floor. Abs light appeared on the dashboard and remained on. Driver was able to maintain control of the vehicle, and drove the vehicle to the dealer for inspection, and mechanic determined that abs module needed to be replaced.