Squeak Chirp Whistle Rattle Type Noise from Rear of Vehicle (Passive Exhaust Valve) or Buffeting Vibration Drone Exhaust Tone Change Body Pressure Booming (AFM Exhaust) – 2014-2017 Cadillac Chevrolet & GMC

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NHTSA ID Number: 10184134

Manufacturer Communication Number: PIT5404G

 

Summary

This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have a buffeting vibration and/or drone type noise, exhaust tone change, and/or body pressure booming.  Replace or repair any of the issue that was found in the inspection. If the vehicle is equipped with a 4.3 liter or 5.3 liter engine an updated exhaust system is now available.

 


Parts Information

The following parts apply to 4.3L or 5.3L equipped vehicles only:

Description Qty Part Number
Muffler Ams-Exh (W/ Exh Pipe) – 5.3L Long Wheel Base SUV CK15906 1 23385910
Muffler Ams-Exh (W/ Exh Pipe) – 5.3L Short Wheel Base SUV CK15706 1 23385911
Muffler Ams-Exh (W/ Exh Pipe) – 4.3L LV3, 5.3L L83 Crew Cab 6′ 6″ Bed CK15743 1 84020521
Muffler Ams-Exh (W/ Exh Pipe) – 4.3L LV3, 5.3L L83 Crew Cab 5′ 8″ Bed CK15543 1 84020522
or
4.3L LV3, 5.3L L83 Double Cab 6′ 6″ Bed CK15753
Muffler Ams-Exh (W/ Exh Pipe) – 4.3L LV3, 5.3L L83 Regular Cab 8′ Bed CK15903 1 84020523
Muffler Ams-Exh (W/ Exh Pipe) – 4.3L LV3, 5.3L L83 Regular Cab 6′ 6″ Bed CK15703 1 84020524

 


 


20 Affected Products

Vehicles

MAKE MODEL YEAR
CADILLAC ESCALADE 2015-2017
CHEVROLET SILVERADO 1500 2014-2017
CHEVROLET SUBURBAN 2015-2017
CHEVROLET TAHOE 2015-2017
GMC SIERRA 1500 2014-2017
GMC YUKON DENALI 2015-2017

 


NHTSA ID Number: 10114512

Manufacturer Communication Number: PIT5404

 

Summary

This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have a buffeting vibration and/or drone type noise, exhaust tone change, and/or body pressure booming. The concern may be most noticeable while the engine is operating in 4-cylinder Active Fuel Management mode in the 1,100-1,400 RPM range. If the noise is excessive it may excite the roof sheet metal and compound the issue, if this concern is found refer to the latest version of PIT5318. If the concern is qualified to be present during V4 mode operation, but is deemed to be normal by comparing to a like vehicle, then no further repairs should be made, as this is a normal characteristic. If the concern is qualified to be present during V4 mode operation, but is deemed excessive by comparing to a like vehicle then continue with the direction in the Preliminary Information. Vehicles equipped with the 6.2 liter engine and noise cancellation, the noise cancellation may not be working or working incorrectly this can be the cause of the issue. Technician should inspect for aftermarket audio components, objects blocking the microphones or speakers, Diagnostic Trouble Codes B0560, B1277, B127C, or B127D. By the technician pulling the fuse for the amplifier the noise cancellation will be disabled if the noise improves there may be an issue with the noise cancellation system. Technician should inspect the exhaust system also. Exhaust should be checked when it is hot and cold while the vehicle is in neutral, forward and reverse gear. Inspect the exhaust system for loose and/or missing fasteners, heat shields damaged, joints and/or couplings not properly seated, bracket and/or insulator mounting concerns, inadequate clearance to body and/or chassis components, improper alignment, disconnected and/or missing insulators, cracked, dry-rotted, and/or oil-soaked insulators, stretched, twisted, broken, torn, and/or collapsed insulators, and bent, twist

 

1 Associated Document

Manufacturer Communications

Bulletin No.: PIT5404
Date: May-2015

https://www.nhtsa.gov/recalls?nhtsaId=10114512

MC-10114512-9999.pdf 85.26KB

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NHTSA ID Number: 10113457

Manufacturer Communication Number: PIT5404C

 

Summary

This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have a buffeting vibration and/or drone type noise, exhaust tone change, and/or body pressure booming. Replace or repair any of the issue that was found in the inspection. If the vehicle is equipped with a 4.3 liter or 5.3 liter engine an updated exhaust system is now available.

 

1 Associated Document

Manufacturer Communications

Bulletin No.: PIT5404C
Published date: 02/28/2017

https://www.nhtsa.gov/recalls?nhtsaId=10113457

MC-10113457-9999.pdf 155.942KB

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NHTSA ID Number: 10118269

Manufacturer Communication Number: PIT5404D

 

Summary

This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have a buffeting vibration and/or drone type noise, exhaust tone change, and/or body pressure booming. Replace or repair any of the issue that was found in the inspection. If the vehicle is equipped with a 4.3 liter or 5.3 liter engine an updated exhaust system is now available.

 

1 Associated Document

Manufacturer Communications

Bulletin No.: PIT5404D
Published date: 06/16/2017

https://www.nhtsa.gov/recalls?nhtsaId=10118269

MC-10118269-9999.pdf 154.965KB

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1 Associated Document

Manufacturer Communications

Bulletin No.: PIT5404G
Published date: 11/20/2020

https://www.nhtsa.gov/recalls?nhtsaId=10184134

MC-10184134-9999.pdf 503.08KB

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“This site contains affiliate links for which OEMDTC may be compensated”
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