2017 Chevrolet Equinox

This Preliminary Information communication provides information to the technician about vibration complaints that are one of the most challenging complaints to accurately diagnose and repair. Technician will need to use Pico Oscilloscope Diagnostic Kit to effectively diagnosis vehicles. Technician should drive the vehicle will using the Pico Oscilloscope to record data. After the data is recorded it should be reviewed to determine the root cause of the concern. If a repair attempt made the concern better but not eliminated or had no affect at all, and are requesting assistance from General Motors Technical Assistance Center record another Pico file and save it to the computer. After the new Pico Oscilloscope data has been saved email the data to General Motors Technical Assistance Center in the subject line include ?Vibration? ?Business Associate Code? and the last 8 of the Vehicle Identification Number.

THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIANS FOR DIAGNOSING AND REPAIRING VEHICLES THAT HAVE AN ISSUE WITH A POP NOISE FROM THE FUEL TANK AREA AFTER A COLD START OR EVAPORATIVE EMISSIONS SYSTEM PURGE. TECHNICIAN WILL BE ABLE TO USE GLOBAL DIAGNOSTIC SYSTEM 2 TO DUPLICATE THE CONCERN BY COMMANDING A PURGE AND SEAL ON THE EVAPORATIVE EMISSIONS SYSTEM. REPLACEMENT OF THE AUXILIARY FUEL PUMP MODULE ASSEMBLY WILL CORRECT THIS CONCERN.

THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON THE STEPS TO DIAGNOSE AND REPAIR VEHICLES THAT HAVE A RESONANCE TYPE VIBRATION OCCURS BETWEEN 40 TO 60 MPH. IN MOST CASES THE ENGINE MUST BE UNDER A SLIGHT LOAD SUCH AS A/C COMPRESSOR ENGAGEMENT, LIGHT THROTTLE, AND IN 6TH GEAR TORQUE CONVERTER CLUTCH APPLIED. TECHNICIAN WILL RELAX THE ENGINE AND TRANSMISSION MOUNTS, THEN THE EXHAUST SYSTEM BY LOOSENING THE FRONT PIPE STUDS. ALSO WORK DOWN THE SYSTEM DISCONNECTING ONE EXHAUST HANGER AT A TIME. THEN TAKE THE VEHICLE ON A TEST DRIVE TO VERIFY THERE WAS IMPROVEMENT. IF ADDITIONAL STEPS ARE REQUIRED PLACE TWO SETS OF EXHAUST DAMPENERS ONE SET BEFORE AND ONE SET AFTER THE FRONT CATALYTIC CONVERTER. IT MAY BE REQUIRED TO MOVE THE PAIR OF DAMPENERS ALONG THE EXHAUST SYSTEM TO GET THE BEST RESULTS.