Diagnostic Information on Engine Vibration – 2014-2021 Cadillac Chevrolet GMC

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NHTSA ID Number: 10198880

Manufacturer Communication Number: 21NA109

 

Summary

This service bulletin provides diagnostic information for a customer concern of engine vibration.

 

 


92 Affected Products

Vehicles

MAKE MODEL YEAR
CADILLAC CTS 2015-2019
CADILLAC ESCALADE 2015-2021
CADILLAC ESCALADE ESV 2015-2021
CHEVROLET CAMARO 2016-2021
CHEVROLET CORVETTE 2016-2019
CHEVROLET EXPRESS 2016, 2018-2021
CHEVROLET SILVERADO 1500 2014, 2017-2021
CHEVROLET SILVERADO 2500 2015-2019
CHEVROLET SILVERADO 4500HD 2019
CHEVROLET SUBURBAN 2015-2021
CHEVROLET TAHOE 2015-2021
GMC SAVANA 2016, 2018-2021
GMC SIERRA 1500 2014, 2019-2021
GMC SIERRA 2500 2015-2018
GMC SIERRA DENALI 2015-2019
GMC YUKON 2015-2021
GMC YUKON XL 2015-2021

 


Condition

Some customers may have a concern with an engine vibration. This vibration may occur when vehicle is stationary or accelerating from a stop.

It may be found that the engine oil was recently changed.

 

Cause

This may be caused by the engine being overfilled with oil.

 

Information

If the above concern is encountered, it is recommended to check the engine oil level.
Refer to the vehicle owner manual for details on correctly checking engine oil level.

A vibration caused by a crankcase overfilled with engine oil will typically display Engine 1 (E1) as the dominant vibration when monitored with the PICO Scope.

• If the engine oil level is confirmed to be overfull, verify if the crankcase was overfilled with engine oil or is contaminated by an outside substance such as fuel or coolant.

• If the engine was overfilled with only engine oil, adjust the oil level and re-evaluate the concern (possibly the result of the engine oil having been overfilled during an oil change or maintenance service).

• If the engine oil level was overfull as a result of contamination, determine the source of the contamination and repair as needed.

 



1 Associated Document

Manufacturer Communications

Bulletin No.: 21-NA-109
Date: May, 2021

https://www.nhtsa.gov/recalls?nhtsaId=10198880

MC-10198880-9999.pdf 509.277KB

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NHTSA ID Number: 10171264

Manufacturer Communication Number: PIP5503B

 

Summary

This Preliminary information communicates to the dealer additional information on checking for the engine crankcase being overfull on oil causing an engine vibration concern. The technician is advised to inspect for contaminants and adjust the engine oil level as needed.

 

1 Associated Document

Manufacturer Communications

Bulletin No.: PIP5503B
Published date: 01/10/2020

https://www.nhtsa.gov/recalls?nhtsaId=10171264

MC-10171264-9999.pdf 101.089KB

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NHTSA ID Number: 10154577

Manufacturer Communication Number: PIP5503A

 

Summary

This Preliminary information communicates to the dealer additional information on checking for the engine crankcase being overfull on oil causing an engine vibration concern. The technician is advised to inspect for contaminants and adjust the engine oil level as needed.

 

1 Associated Document

Manufacturer Communications

Bulletin No.: PIP5503A
Published date: 12/11/2018

https://www.nhtsa.gov/recalls?nhtsaId=10154577

MC-10154577-9999.pdf 99.299KB

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NHTSA ID Number: 10118273

Manufacturer Communication Number: PIP5503

 

Summary

This Preliminary information communicates to the dealer additional information on checking for the engine crankcase being overfull on oil causing an engine vibration concern. The technician is advised to inspect for contaminants and adjust the engine oil level as needed.

 

1 Associated Document

Manufacturer Communications

Bulletin No.: PIP5503
Published date: 06/19/2017

https://www.nhtsa.gov/recalls?nhtsaId=10118273

MC-10118273-9999.pdf 70.663KB

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