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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.
SEOCONTENT-START
Service Bulletin Bulletin No.: 21-NA-118 Date: May, 2021 TECHNICAL Subject: Vibration Type Noise Heard at Highway Speeds or with Engine Speed at 1,300-1,500 RPM Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Cadillac XT5 XT6 2020 2021 LGX All Chevrolet Blazer GMC Acadia Involved Region or Country North America, Russia, Middle East, Israel, Palestine, Chile, Columbia, Ecuador, Peru, Japan, S. Korea, Australia and New Zealand. 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 5776432 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. Page 2 May, 2021 Bulletin No.: 21-NA-118 Warranty Information For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. Labor Operation Description Labor Time 4088058* Align Exhaust System 0.3 hr *This is a unique Labor Operation for Bulletin use only. Version 1 Modified Released March 19, 2021
SEOCONTENT-END
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
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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- Available in 16 different shapes and designs, including: bolt hole alignment, ball head separation, unfolding knuckle, center punch, knockout bolts and pins.
- Heat treated chromium vanadium provides a high hardness rating that prevents rapid expansion of the head and passivation of the chisel and punch.
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- 5PC Punch: 3/32" x 4-1/4", 1/8" x 4-3/4", 5/32" x 5", 3/16" x 5-1/4", 1/4" × 5-3/4" and 2PC Center punch: 1/8" x 5", 3/16" x 6"
- Product material: made of chrome vanadium steel, hardness: 54~58HRC
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- 【Pin Punches】- 9pcs roll pin punches with knurled handle are made of high quality hardened steel, and come with red fitted nylon storage pouch, easy to use, carry, storage and hang.
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- 【All-IN-1 Set】Includes everything you need to get started and suitable for everyone, whether you're a novice or a veteran. This punch set includes 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 9/32" and 5/16". 2Pcs 3/8",15/64" plastic pin punches; 1 metal tweezers and 1 hammer with 4 detachable hammer heads; 4Pcs hollow end starter punch set including 1/16”,5/64”,3/32”,1/8”; 2 Pcs flat pin punches including 1/16" and 3/32"; 2 Pcs roll pin punches including 1/16" and 3/32"; 8Pcs carbon steel punches.
- 【Detachable Hammer】 In use with a chrome-plated steel hammer. In addition, we added 4 replaceable hammer heads (1 brass, 1 chrome, 1 nylon in white and 1 rubber in black), so you can choose the right one for your needs. The hammer has a non-slip design, which can cooperate with you in the process of use can be better grip.
- 【Bench Block】Special and durable surface finish to protect your precious from scratches while drifting and staking. Our bench block has a main spring removal groove; front sight staking groove; rear sight drift channel; the link pin removal "V" channel; hammer and sear pin removal holes; slide rail dressing round bottom channel; ejection port dressing channel. Great help for maintenance!
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- 16-piece woodworking punch and chisel set includes 3 cold chisels, 5 taper punches, 5 pin punches, 2 center punches, and 1 chisel punch gauge
- Heat treated, chrome vanadium (Cr-V) alloy steel construction
- Comfortable handles reduce hand strain and improve accuracy
- Storage pouch with velcro closure keeps tools organized and secured
- Use safety goggles
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- Pin sizes 1/8", 3/16", 1/4", 5/16" and 3/8"
- 8" long to reach deeply set pins in obstructed areas
- Knurled Steel handles for sure grip in every application
- EASY TO USE: The simple mechanics of this valve lifter remover give quick and easy operation
- WALL MOUNTABLE: Includes bracket and hardware needed for convenient placement on the ceiling, wall, floor, or workbench; Place both vertically or horizontally
- One piece forged construction for strength
- Hardened, quenched, and tempered for long life
- Powder coated for easy visibility
- VERSATILE SET: The Performance Tool W754 28-Piece Punch and Chisel Set with Roll-Up Vinyl Storage Pouch is a complete set of both chrome vanadium and high carbon steel punch and chisels, ensuring you have the right tool for any job.
- DURABLE MATERIALS: The 16-piece chrome vanadium set is ideal for higher impact applications, while the 12-piece hardened carbon steel set is perfect for softer metals.
- COMPREHENSIVE RANGE: This set includes 5 pin punches, 5 taper punches, 3 cold chisels, 2 center punches, 1 chisel punch gauge, and 12 hardened carbon steel punches and chisels, giving you a wide range of options for various applications.
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