13318A - SERVICE UPDATE (REVISED SERVICE PROCEDURE). THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPLACE THE POWER SLIDING REAR GLASS REGULATOR ON CERTAIN VEHICLES, EQUIPPED WITH THE POWER SLIDING REAR WINDOW FEATURE (A48). ON THESE VEHICLES, THE PLASTIC COMPONENTS OF THE CABLE/PULLEY ASSEMBLY MAY DEFORM, CAUSING THE FEATURE TO BECOME INOPERATIVE. IF THE WINDOW IS IN THE OPEN POSITION WHEN IT BECOMES INOPERATIVE, THE WINDOW DEFOGGER CANNOT BE ACTIVATED.