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NHTSA ID Number: 10204438
Manufacturer Communication Number: PIT5863
Summary
This Preliminary information communicates that a vehicle may be encountered with a buzz or rattle type noise emanating from the exhaust. The dealer technician is directed to replace the exhaust system.
4 Affected Products
Vehicles
Condition
A vehicle may be encountered with a buzz or rattle type noise. It may be heard or felt in the floor pan, in the dash or throughout the vehicle. This noise can be extremely difficult to duplicate. It will dependent on engine load rather than vehicle speed. Normally it can be duplicated at 2,000- 2,500 engine RPM’s but may come in at a higher range. The vehicle must be driven to duplicate the concern.
Cause
Loose or missing welds inside the front muffler/resonator
Correction:
Review 21-NA-118 Vibration Type Noise Heard at Highway Speeds or with Engine Speed at 1,300-1,500 RPM to ensure that the
gaskets are not the cause of the noise.
If the concern can be duplicated use chassis ears at or near the exhaust resonator/muffler to determine if this is where the noise is coming from.
If the vehicle was built between start of production 2021 and 6/1/2021 replace the exhaust system from the exhaust flanges back.
SEOCONTENT-START
Bulletin No.: PIT5863
Published date: 11/2/2021
Preliminary Information
PIT5863 Buzz or Rattle Noise from Exhaust System
Models
Brand: Model: Model Years:
VIN:
Engine: Transmissions:
from to
Cadillac
XT5 2021 2021 SORP 6-1-2021 LGX All
Cadillac XT6 2021 2021 SORP 6-1-2021 LGX All
Chevrolet Blazer 2021 2021 SORP 6-1-2021 LGX All
GMC Acadia 2021 2021 SORP 6-1-2021 LGX All
Involved Region or
Country North America
Condition
A vehicle may be encountered with a buzz or rattle type noise. It may be heard or felt in the floor pan,
in the dash or throughout the vehicle. This noise can be extremely difficult to duplicate. It will
dependent on engine load rather than vehicle speed. Normally it can be duplicated at 2,000- 2,500
engine RPM’s but may come in at a higher range. The vehicle must be driven to duplicate the concern.
Cause Loose or missing welds inside the front muffler/resonator
Correction:
Review 21-NA-118 Vibration Type Noise Heard at Highway Speeds or with Engine Speed at 1,300-1,500 RPM to ensure that the
gaskets are not the cause of the noise.
If the concern can be duplicated use chassis ears at or near the exhaust resonator/muffler to determine if this is where the noise is
coming from.
See the illustration to determine the location of the muffler/resonator.
If the vehicle was built between start of production 2021 and 6/1/2021 replace the exhaust system from the exhaust flanges back.
Version History
Version 1
Modified 11/02/2021 Created on.
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5863
Published date: 11/2/2021
MC-10204438-9999.pdf 221.522KB
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Bestseller No. 1
Steelman Wireless ChassisEAR Auto Diagnostic Tool Kit, Identify The Cause of Troubling Vehicle Noises, 4 Transmitters with 50-Foot Range (61082)
- NOISE DETECTION - Detect the source or squeaks, rattles, and other errant or troublesome noises
- 50-FOOT RANGE - Transmitters have a 50-foot signal range allowing use on small and large vehicles
- BUILT-IN SPEAKER - Monitor sounds with the built-in speaker or via headphones through the 3.5mm jack
- SIGNAL STRENGTH INDICATOR - LED lights indicate signal strength of the active channel
- ILLUMINATED CHANNEL BUTTONS - Active channels have illuminated buttons and can be changed or muted with a quick push
SaleBestseller No. 2
STEELMAN PRO ChassisEAR 2 Auto Diagnostic Noise Finder
- PINPOINT NOISES - Easily pinpoint troubling noises that cannot be duplicated in a repair stall and only occur during road driving
- MULTI-CHANNEL - Connect up to six (6) color coded sensor clamps to different locations to find a noise's source
- FULL HEADPHONES - Includes a set of full-coverage over-ear headphones to block out surrounding noise
- USB RECHARGEABLE - USB rechargeable integrated battery provides up to 8 hours of continuous use per charge
- 10-FOOT CABLES - 10-foot long wire leads allow clamps to be positioned in difficult to reach places
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Mefape Automotive Stethoscope, Chassis Ears with 6 Channels Color Light Indicators, Electronic Stethoscope, Automotive Diagnostic Kit, Mechanic Stethoscope for Auto Body Engine Chassis, Vol Up/Down
- Automotive Diagnostic Kit used to to help diagnose and fix problems with your vehicle by efficiently locating the noise in fuel injection system, chassis, engine, bearings, gears, and suspension system
- Mechanic Stethoscope Kit equipped with a 6-channel host and 6 different sensors, applicable to different parts of vehicles
- Electronic Stethoscope features color light indicators that help you identify the source of the noise, easier to diagnose and fix problems
- Chassis Ears come with premium headphones that are excellent in anti-interference and can transmit high-quality clear sounds
- Auto Stethoscope Kit is easy to use, cost-effective for diagnosing and fixing problems with vehicles, heavy machinery, etc
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Chassis Ear Automotive Engine Noise Finder Tool, 6 Channel Chassis Ears Sound Detector Identify the Troubling Engine Noises (Over-Ear Headphones)
- 【Multi-Channel Chassis Ears 】6-channel detector design, the host computer with integrated 6-channel signal receiver is used with 6 different sensors ,sound and light synchronization. Engine noise detector can detect abnormal noise in different locations and adjust the reception of different channels according to the detection situation. When a generator is running, it can detect the impact of vibration due the failure of a bearing, gear, valve, crank, cylinder, gearbox, vehicle body noise, etc.
- 【LED Indicator and Adjustable Sensitivity】The power indicator lights up when the chassis ears starts up and begins testing. The abnormal sound indicator is divided into three colors: green, yellow, and red. The color changes are determined by the detected volume. The minimum volume is green and the maximum is red. By adjusting the light sensitivity knob, the indicator can be used to assist in judging the location of the anomalous noise.
- 【High Sensitivity】The chassis ears detector has high sensitivity and the earphone pick-up sound loudness can be controlled by adjusting its volume control. The automotive noise detector turn the indicator light clockwise to increase the sensitivity, and rotate counter clockwise to reduce sensitivity, the range of the indicator light changes with the adjustment of the sensitivity.
- 【Quickly Detection and Positioning】This chassis ears engine noise detector is specially designed and developed for checking abnormal noise of automobile engine, abnormal noise of body, and abnormal noise of chassis, etc. It can quickly find out the noise source and its location, accurately locate the fault, easily identify the early problems of the car and facilitate car repair as soon as possible.
- 【Packing List and Warranty】The engine chassis ear kit includes automotive detector tool, 6 clip-on sensors, sensor extension cords (3 for a 5-meter extension cord and 2 for a 3-meter extension cord), over-ear earphones. All accessories are neatly packed in the tool case for easy carrying. And we offer 12 months warranty, if you encounter any problems during use, you can get help from us, we will replace or refund, customer satisfaction is our top priority.
Bestseller No. 5
Shkalacar Chassis Ears Automotive Electronic Stethoscope, Mechanic Stethoscope Car Engine Noise Detector with Headphones, Multi-Channel Sensitivity Diagnostic with Extension Cables & Handbag
- 【SPECIAL Electronic Stethoscope】This automotive stethoscope kit is specially designed and developed for checking abnormal noise of car engine, abnormal noise of body, and abnormal noise of chassis, etc. The host computer with integrated six-channel signal receiver is used with six different sensors to detect abnormal noise during the driving of the car, synchronized with sound and light, which can easily identify the early problems of the car and facilitate car repair as soon as possible.
- 【SENSITIVITY ADJUSTMENT】Chassis Ears with Indicator light sensitivity adjustment: Turn clockwise to increase sensitivity and rotate counterclockwise to reduce sensitivity, the range displayed by the indicator light changes with the adjustment of the sensitivity; Sound sensitivity adjustment: Turn clockwise to increase sensitivity, this is the range of adjusting the sensor's Income tone.
- 【ABNORMAL SOUND INDICATOR LIGHT】The Automotive Stethoscope onsists of three colors: green, yellow, and red. The color changes are determined by the detected volume. The minimum volume is green and the maximum is red. The abnormal noise of the six channels can be shown at the same time through the six rows of indicator lights. By adjusting the light sensitivity knob, the indicator can be used to assist in judging the location of the anomalous noise.
- 【MAIN APPLICATION】Mechanics Stethoscope with Six-channel car noise finder is a portable device that can be used to detect bearings, gears and suspension systems, and automatic transmission system, detect abnormal sound of fuel injection system, abnormal sound of chassis system, abnormal noise under the hood, quickly find out the noise source and its location, accurately locate the fault.
- 【CONFIGURATION LIST】The package includes 1 * detector host, 6 * clip-on sensors (Abnormal noise information can be detected at six different locations at the same time), 1 * headphone (Simple and comfortable, the volume can be adjusted at will), 3 * 3M sensor extension cables, 3 * 5M sensor extension cables. If you have any problems during use, please feel free to contact us.
Bestseller No. 6
KTTOOL 6 Channel Car Engine Noise Finder, Sound Detector Tester Tool Set, Chassis System Ears, Electronic Stethoscope Diagnostic Kit with Headphones
- 🚕【PMulti-Channel Chassis Ears Automotive Engine Tool】: 6-channel detector design, sound and light synchronization. This auto detector tool can detect abnormal noise in different locations and adjust the reception of different channels according to the detection situation.When a generator is running, it can detect the impact of vibration due the failure of a bearing, gear, valve, crank, cylinder, gearbox, vehicle body noise, etc.
- 💡【Abnormal sound indicator lighe】: The abnormal sound indicator consists of three colors: green, yellow, and red. The color changes are determined by the detected volume. The minimum volume is green and the maximum is red. The abnormal noise of the six channels can be shown at the same time through the six rows of indicator lights. By adjusting the light sensitivity knob, the indicator can be used to assist in judging the location of the anomalous noise.
- 🔎【Chassis Ear Car Detector Tool with Indicator light sensitivity & headphone channel socket】: The car engine noise detector tool turn the indicator light clockwise to increase the sensitivity, and the range of the indicator light changes with the adjustment of the sensitivity. 6 Channel chassis ear car detector tool have six channels to detect abnormal noise sources at different locations at the same time, freely select channels through channel selection.
- 📈【List】: The package includes 1 * detector host, 6 * clip-on sensors (Abnormal noise information can be detected at six different locations at the same time), 1 * headphone (Simple and comfortable, the volume can be adjusted at will), 3 * 3M sensor extension cables, 3 * 5M sensor extension cables. If you encounter any problems during use, please feel free to contact us.
- ✅【Excellent Service】：We are committed to providing the best professional tools and the best service for auto repair. If you have any questions, please don't hesitate to contact us. We provide 24-hour before and after-sales service.
Bestseller No. 7
Chassis System Ears Electronic Stethoscope Diagnostic Kit with Headphones, PLAYOCCAR 6 Channel Car Engine Noise Finder Sound Detector Tester Tool Set
- 【SPECIAL DETECTOR TOOL】This automotive stethoscope kit is specially designed and developed for checking abnormal noise of car engine, abnormal noise of body, and abnormal noise of chassis, etc. The host computer with integrated six-channel signal receiver is used with six different sensors to detect abnormal noise during the driving of the car, synchronized with sound and light, which can easily identify the early problems of the car and facilitate car repair as soon as possible.
- 【ABNORMAL SOUND INDICATOR LIGHT】The abnormal sound indicator consists of three colors: green, yellow, and red. The color changes are determined by the detected volume. The minimum volume is green and the maximum is red. The abnormal noise of the six channels can be shown at the same time through the six rows of indicator lights. By adjusting the light sensitivity knob, the indicator can be used to assist in judging the location of the anomalous noise.
- 【SENSITIVITY ADJUSTMENT】Indicator light sensitivity adjustment: Turn clockwise to increase sensitivity and rotate counterclockwise to reduce sensitivity, the range displayed by the indicator light changes with the adjustment of the sensitivity; Sound sensitivity adjustment: Turn clockwise to increase sensitivity, this is the range of adjusting the sensor's Income tone.
- 【MAIN APPLICATION】Six-channel car noise finder is a portable device that can be used to detect bearings, gears and suspension systems, and automatic transmission system, detect abnormal sound of fuel injection system, abnormal sound of chassis system, abnormal noise under the hood, quickly find out the noise source and its location, accurately locate the fault.
- 【CONFIGURATION LIST】The package includes 1 * detector host, 6 * clip-on sensors (Abnormal noise information can be detected at six different locations at the same time), 1 * headphone (Simple and comfortable, the volume can be adjusted at will), 3 * 3M sensor extension cables, 3 * 5M sensor extension cables. We provide 1 year free warranty & 24 hours customer email support service, please feel free to reach us if you need!
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STEELMAN 60635 Wireless ChassisEAR Diagnostic Device Kit
- NOISE DETECTION - Detect the source or squeaks, rattles, and other errant or troublesome noises throughout a car or truck's chassis
- 50-FOOT RANGE - Noises can be transmitted up to 50-feet from the transmitter to the receiver allowing use on small and large vehicles
- BUILT-IN SPEAKER - Listen to noises with the built-in speaker or with headphones through the 3. 5mm jack
- SIGNAL STRENGTH INDICATOR - LED lights indicate signal strength of the active channel
- ILLUMINATED CHANNEL BUTTONS - Illuminated buttons indicate the active channels and can be changed or muted with a quick push
Bestseller No. 9
Steelman Microphone Transmitter Lead and Clamp Replacement Pack for Wireless ChassisEAR Auto Diagnostics Tool, 4-Pack (97202-08)
- REPLACEMENT 4-PACK - Microphone clamps for the STEELMAN 97202, 60635 & 61082 Wireless ChassisEAR Diagnostic Device Kits
- PINPOINT TROUBLING NOISES - Easily pinpoint troubling noises that cannot be duplicated in a repair stall and only occur during road driving
- 2-FOOT CABLES - 2-foot (24-inch) long wire leads provide the length you need to mount wireless transmitters securely yet still be able to reach trouble spots
- STEEL ALLIGATOR CLAMPS - Alligator style clamps are made of durable steel with a sturdy jaw for maximum hold strength
- INSULATED WIRE LEADS - Insulated cables on the wire leads protect against signal interference and damage during use
Bestseller No. 10
STEELMAN 61082-01 Wireless ChassisEAR Transmitter #1
- REPLACEMENT UNIT - Replacement for the channel #1 wireless transmitter for the 61082 Wireless ChassisEAR
- DETECT SQUEAKS AND RATTLES - Wireless ChassisEAR detects squeaks and rattles throughout vehicle
- 50-FOOT RANGE - Signal can be sent up to 50-feet to the receiver, allowing use on small and large vehicles
- INDICATOR LED - LED Indicator light to show when unit is actively transmitting
- MULTIPLE ATTACHMENT METHODS - Comes with 2 attachment options, a spring-clip and two integrated magnets
Last update on 2025-04-17 / Affiliate links / Images from Amazon Product Advertising API
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