Vibration Type Noise Heard at Highway Speeds or with Engine Speed at 1,300-1,500 RPM – 2020-2021 Cadillac Chevrolet GMC

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NHTSA ID Number: 10198887

Manufacturer Communication Number: 21NA118

 

Summary

This technical bulletin provides a procedure to align the exhaust causing a vibration.

 

 


8 Affected Products

Vehicles

MAKE MODEL YEAR
CADILLAC XT5 2020-2021
CADILLAC XT6 2020-2021
CHEVROLET BLAZER 2020-2021
GMC ACADIA 2020-2021

 


Condition

Some customers may comment on a vibration type noise at highway speeds and/or with Engine Speed at 1,300-1,500 RPM. The sound can usually be heard from under the vehicle.

 

Cause

The cause of the condition may be due to some of the metal gasket tabs between the front exhaust and muffler not being fully crimped, exhibiting some spring-back, allowing for them to touch at certain speeds / RPMs.

 

Correction

Refer to the procedure below to correct the condition stated above.

 

Service Procedure

With a small punch or chisel and hammer bend/crimp the tabs on the exhaust gasket in further to prevent any spring-back and provide increased clearance between the two tabs to correct the noise or cutting the tabs off the gaskets is also acceptable.

 

Parts Information

No parts are required for this repair.

 


 


1 Associated Document

Manufacturer Communications

Bulletin No.: 21-NA-118
Date: May, 2021

https://www.nhtsa.gov/recalls?nhtsaId=10198887

MC-10198887-9999.pdf 976.113KB

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NHTSA ID Number: 10193433

Manufacturer Communication Number: PIT5825B

 

Summary

This Preliminary information communicates information regarding a Vibration Type Noise from the metal gasket tabs between the front exhaust and muffler.

 

1 Associated Document

Manufacturer Communications

Bulletin No.: PIT5825B
Published date: 04/6/2021

https://www.nhtsa.gov/recalls?nhtsaId=10193433

MC-10193433-9999.pdf 274.212KB

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