NAVISTAR IS RECALLING CERTAIN MODEL YEAR 2009-2010 INTERNATIONAL PROSTAR AND LONESTAR TRUCKS EQUIPPED WITH FEATURE CODE 04AZT ROLL STABILITY CONTROL. THE AIR LINE THAT SUPPLIES THE TRACTION SOLENOID VALVE OF THE ROLL STABILITY CONTROL (RSC) SYSTEM MAY HAVE BEEN CONNECTED TO AN INCORRECT PORT ON THE AIR TANK. THIS CONDITION WILL AFFECT AIR MODULATION TO THE TRAILER BRAKES IF RSC IS ACTIVATED DURING A ROLL STABILITY EVENT. THIS CONDITION AT NO TIME AFFECTS THE NORMAL DESIGN FUNCTION OF THE TRACTOR AND TRAILER SERVICE BRAKES WHEN ACTIVATED BY THE DRIVER, OR THE FUNCTION OF THE TRACTOR RSC SYSTEM.