2016 GMC Yukon

THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON HOW TO DIAGNOSE AND REPAIR VEHICLES THAT MAY HAVE A RATTLE NOISE FROM THE SECOND ROW SEAT. TECHNICIAN WILL NEED TO INSPECT THE STRIKER NOT ALIGNED PROPERLY IN LATCH OPENING. TO REPAIR THIS CONDITION, REWORK/ADJUST THE STRIKER IN THE DIRECTION TO CENTER IT IN THE LATCH OPENING. AN ADJUSTABLE WIDE MOUTH METAL WORKING TOOL MAY BE USED TO ADJUST THE STRIKER JUST ENOUGH TO CENTER IN THE LATCH OPENING. TECHNICIAN MAY FIND A SEAT BOTTOM LATCH MAY HAVE AN UNEQUAL LATCH OPENING SIDE-TO-SIDE FOR THE STRIKER TO SEAT INTO. TO REPAIR THIS CONDITION, WITH THE AFFECTED SEAT IN THE TUMBLED FORWARD POSITION, WHILE APPLYING STEADY, FIRM PRESSURE, CYCLE THE SEAT DOWN INTO THE LATCHED POSITION. SOME VEHICLES BUILT PRIOR TO 09/21/2015 WITH 60/40 SPLIT BENCH SEAT MAY HAVE 60-PERCENT LONG SIDE BENCH, INBOARD LATCH MAY NOT BE PROPERLY ALIGNED IN STRIKER OPENING. TECHNICIAN WILL NEED TO PLACE A 2.6 MM THICK FLAT WASHER OVER THE 40 PERCENT SEAT BASE STUD, NOT THE FLOOR STUD. SOME VEHICLES MAY HAVE A SEAT BASE PLAT THAT RATTLES AGAINST THE RIB IN THE FLOOR PAN. APPLY MYLAR TAPE TO THE FLOOR PAN UNDER THE SEAT PLATE TO PROVIDE RELIEF FOR THE RATTLE CONDITION.

THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON THE STEPS TO DIAGNOSE AND REPAIR VEHICLES THAT MAY HAVE ISSUES WERE THE CUSTOMER WILL NEED INCREASED EFFORT TO DEPRESS THE BRAKE PEDAL. TECHNICIAN MAY FIND FLUID IN THE BRAKE BOOSTER AND/OR THE BOOSTER VACUUM LINE. TECHNICIAN WILL NEED TO REPLACE VACUUM PUMP, BRAKE BOOSTER, MASTER CYLINDER, VACUUM PUMP BELT AND THE VACUUM LINE BETWEEN THE BOOSTER AND THE PUMP.

THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON HOW TO DIAGNOSE AND REPAIR VEHICLE THAT MAY HAVE A "CHECK TRAILER WIRING" OR "SERVICE TRAILER BRAKE SYSTEM” MESSAGE ON THE DRIVER INFORMATION CENTER WHEN A TRAILER IS CONNECTED TO THE VEHICLE. DIAGNOSTIC TROUBLE CODE C1114 SET IN THE CHASSIS CONTROL MODULE. CHASSIS CONTROL MODULE HAS TO DETERMINE THE TYPE OF TRAILER BRAKE SYSTEM THAT IS BEING USED. THE CHASSIS CONTROL MODULE CAN BE SENSITIVE TO A VARIETY OF TRAILER WIRING ISSUES. THE TECHNICIAN WILL NEED TO MAKE A TRAILER TESTER USING ELECTRIC TRAILER BRAKE MAGNETS AND 7-WAY TRAILER CONNECTOR TO DETERMINE IF IT IS A VEHICLE OR TRAILER ISSUE. IF THE CONCERN IS NOT DUPLICATED WITH THE TESTER INSTALLED, THE VEHICLE IS OPERATING CORRECTLY AND THE FOCUS SHOULD BE ON THE TRAILER WIRING OR 7 WAY CONNECTOR.