THE INVOLVED VEHICLES WERE BUILT WITH CERTAIN TRACTOR PROTECTION VALVES WHICH MAY CONTAIN AN EXTRA VALVE. THIS MAY PREVENT THE TRAILER BRAKES FROM FULLY RELEASING AFTER A LOW PRESSURE APPLICATION, CAUSING THE TRAILER BRAKES TO DRAG.
THE DEALER WILL INSPECT FOR THE PRESENCE OF THE EXTRA CHECK VALVE. IF FOUND, THE EXTRA CHECK VALVE WILL BE REMOVED. THIS WILL BE DONE AT NO CHARGE.