Engine Vibration – Resonance/Boom Between 40 To 60 MPH – 2010-2017 Chevrolet Equinox & GMC Terrain

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NHTSA ID Number: 10080685

Manufacturer Communication Number: PIP5277B

 

Summary

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.

 

 


16 Affected Products

Vehicles

MAKE MODEL YEAR
CHEVROLET EQUINOX 2010-2017
GMC TERRAIN 2010-2017

 


Condition/Concern

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 tcc applied.

It also is described as a 2nd order engine boom or vibration. In most cases this is an inherent condition on 4 cylinder models, however in some cases this condition is much more amplified.

 


1 Associated Document

Service Bulletin Document

Bulletin No.: PIP5277B
Date: Jun-2016

https://www.nhtsa.gov/recalls?nhtsaId=10080685

SB-10080685-2280.pdf 292.633KB

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NHTSA ID Number: 10115122

Manufacturer Communication Number: PIP5277A

 

Summary

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 Air Conditioning 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.

 

1 Associated Document

Manufacturer Communications

Bulletin No.: PIP5277A
Date: Nov-2015

https://www.nhtsa.gov/recalls?nhtsaId=10115122

MC-10115122-9999.pdf 295.986KB

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NHTSA ID Number: 10139367

Manufacturer Communication Number: PIP5277

 

Summary

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 Air Conditioning 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.

 

1 Associated Document

Manufacturer Communications

Bulletin No.: PIP5277
Date: Mar-2015

https://www.nhtsa.gov/recalls?nhtsaId=10139367

MC-10139367-9999.pdf 283.157KB

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