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
- 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
- Quickly detect the source of squeaks, rattles, and other noises throughout a car or truck's chassis
- Kit includes four independent transmitters to mount throughout the vehicle
- 4.3-inch LCD touchscreen-equipped control unit with easy to use interface
- Transmitter jumpers allow separate mounting of clamps and transmitters in confined spaces
- Color coded boots and location naming in software to quickly locate trouble spots
- 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
- Auto Detector Tool with Seek Out the Noises:This automotive engine tools is specially designed and developed for checking abnormal noise of automobile 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
- Multi-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: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.
- PINPOINT TROUBLING 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) microphones to different under-chassis locations simultaneously to find a noise's source
- FULL HEADPHONES - Includes a set of full-coverage headphones to block out surrounding noise
- COLOR CODED LEADS - Each microphone / clamp is color coded for easy identification
- 16-FOOT CABLES - 16-foot long wire leads allow microphones to be positioned in difficult to reach places
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