NHTSA ID Number: 10219288
Manufacturer Communication Number: 21-NA-142
Summary
This technical bulletin provides repair information to correct a customer concern of hearing front brake grind/groan noise after sitting overnight.
Condition
A dealer may encounter a vehicle with a grind or growl noise coming from the brakes. This noise will normally occur after the vehicle has been sitting for several hours or overnight. It will occur on a light to medium brake application at low speeds for the rst few stops after the vehicle has been sitting. The noise may be described as a grind, growl, squeak or squeal noise. It may also be noted that there is a sound and a feel as if the ABS has been activated, however there will be no ABS event actually occurring. In some cases, but not all the noise will go away after a few thousand miles of driving.
Cause
Composition of brake material
24 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
BUICK | ENCLAVE | 2020-2023 |
| CADILLAC | XT5 | 2021-2023 |
| CADILLAC | XT6 | 2021-2023 |
| CHEVROLET | BLAZER | 2021-2023 |
| CHEVROLET | COLORADO | 2021-2022 |
| CHEVROLET | TRAVERSE | 2020-2023 |
| GMC | ACADIA | 2021-2023 |
| GMC | CANYON | 2021-2022 |
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-142
Date: August, 2022
NHTSA ID Number: 10185753
Manufacturer Communication Number: PIT5805
Summary
This Preliminary information communicates that a dealer may encounter a vehicle that is making a grinding or growling noise on the first few brake applications after the vehicle has been sitting overnight. The dealer is instructed to perform no repairs at this time as engineering is looking into a repair. The dealer is advised that this PI will be converted into a bulletin with repair instruction when updated parts are available.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5805
Published date: 12/28/2020
- Complete Tool Set: Orion Motor Tech's 24-piece brake caliper compression tool set includes 2 retaining plates, 2 thrust bolt assemblies, 2 brake caliper hangers, and 18 adapters, easily servicing your brakes without damage
- Universal Compatibility: This brake caliper tool kit includes a wide range of adapters to fit most vehicles, including hundreds of American, Japanese, and European models, fully covering your brake servicing needs
- Hassle-Free Use: Simply rotate the pistons back into their calipers to clear the pads. Embedded magnets in each thrust bolt assembly securely hold drive keys and adapters, while the right and left handed designs ensure versatile operation
- Durable Construction: Crafted from heavy-duty 1045 steel, this caliper piston compressor tool set offers exceptional strength and durability, with a powder coating for enhanced wear and corrosion resistance
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- Durable Material: The brake caliper compression tool is carbon steel construction with a rust-proof blasted finish, these blades will stand up to heavy use and accidental drops. It’s perfect for everyone from DIY novices to professional mechanics.
- Easy Operation: This caliper compressor tool includes both right-handed and left-handed thrust bolt assemblies, easy for brake pad replacement and rotating pistons back into the caliper on your car, truck or 4-wheel drive disc brake vehicle.
- Package Included: This brake caliper tool includes 18 x Disc Adapters (#0, #2, #3, #4, #5, #6, #7, #8, #9, #10, #A, #E, #F, #K, #K1, #K2, #M, #N); 2 x Handed Thrust Bolt Assemblies (Left & Right) ;2 x Retainer Plates (#O, #1) ;1 Brake Caliper Hanger; 2 x Rubber Coated Gloves.
- Wide Application: This multi-disc brake caliper wind back tool kit includes 18 adapters fitting hundreds of vehicle makes and models including American, European, and Japanese.
- Red Storage Case: The disc brake piston caliper compressor rewind tool set is packed in a heavy-duty storage case with precision-sized compartments for every piece - great for storage and transport while lengthening the life of the tool set.
- DUAL BRAKE TOOL SET: Orion Motor Tech's 32 pc. brake kit includes 8 drum brake tools: remover, installer, compressor, retainer, pliers, & 3 adjustment spoons, plus 24 disc brake tools with 2 retaining plates, thrust bolt assemblies, 2 hooks, & 18 adapters
- WIDE COMPATIBILITY: Altogether, this dual brake servicing kit covers hundreds of makes and models of cars and light trucks, both import and domestic, allowing you to keep regular maintenance of your brakes for safe driving
- PREMIUM MATERIAL: Each brake tool is made of structural-grade steel for outstanding strength, durability, and longevity; the black oxide, chrome, and sandblasted coated parts ensure superior long-lasting wear and corrosion resistance
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- BLOW-MOLDED CASES: The custom blow-molded carrying cases with their clear labeling and instruction manuals make these sets easy to use, organize, store, and transport between job sites
- COMPLETE SET: Orion Motor Tech's 10 pc. brake tool kit includes all the necessary accessories for servicing your drum brakes: pliers, installers, removers, compressors, retainers, hooks, and standard, angled, and mini adjustment spoons
- PREMIUM MATERIAL: The metallic components are made of structural-grade 45# steel to offer good ductility as well as outstanding strength, durability, and longevity; black oxide and chromate coatings ensure all parts are wear and corrosion resistant
- STURDY HANDLES: The 4 brake spring tools feature reinforced ergonomic handles to save you time and spare you effort and aggravation during use
- CUSTOM CASE: The rugged blow-molded case keeps everything well organized and easy to store or transport between jobs
- WIDE APPLICATION: This brake tool set is designed to fit hundreds of domestic and import vehicle makes and models in the market, covering your automotive servicing needs
- Complete Tool Set: Orion Motor Tech's 24-piece brake caliper compression tool set includes 2 retaining plates, 2 thrust bolt assemblies, 2 brake caliper hangers, and 18 adapters, easily servicing your brakes without damage
- Universal Compatibility: This brake caliper tool kit includes a wide range of adapters to fit most vehicles, including hundreds of American, Japanese, and European models, fully covering your brake servicing needs
- Hassle-Free Use: Simply rotate the pistons back into their calipers to clear the pads. Embedded magnets in each thrust bolt assembly securely hold drive keys and adapters, while the right and left handed designs ensure versatile operation
- Durable Construction: Made from tough carbon steel and 40Cr steel, this caliper piston compressor tool set is built for long-lasting strength, while its powder-coated and zinc-plated finishes provide added protection against wear and corrosion
- Compact & Portable: Our disc brake caliper tool set comes in a convenient storage case, ensuring your tools are organized and always within reach for home and on-the-go repairs
Last update on 2026-05-27 / Affiliate links / Images from Amazon Product Advertising API
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Copyright 2022 General Motors LLC. All Rights Reserved. Service Bulletin Bulletin No.: 21-NA-142 Date: August, 2022 TECHNICAL Subject: Front Brake Grind/Groan Noise After Sitting Overnight This bulletin replaces PIT5805B. Please discard PIT5805B. Brand: Model: Model Year: VIN and DATE Breakpoints: Engine: Transmission: from to from to Buick Enclave 2020 2023 5GAERBKW8LJ296460 All All Cadillac XT5 2021 XT6 Chevrolet Blazer 2021 Colorado 2021 2022 Traverse 2020 2023 1GNERKKW5LJ296020 GMC Acadia 2021 Canyon 2022 Involved Region or Country North America, Russia, Middle East, Palestine, Japan, South Korea, Bolivia, Ecuador, Chile, Colombia, Peru, GM Korea, Uzbekistan. Additional Options (RPOs) Condition Some customers may comment on hearing a brake noise on the first few stops. They may describe it as a grind/groan sound, and it may feel like ABS is active, but it is not. Cause The cause of the condition may be the front disc brake pad material. Note: A revised pad material is being developed to address this noise concern and should be available in the November/December timeframe. If the customer is not satisfied with waiting for the new pads, follow the Correction below. Correction Verify the condition is present and check the pad number stamp on the top edge of the pad. If you see GA9130 or GA9140, and this is the first visit, 1. Replace the front disc brake pads with the parts listed below, refer to Front Disc Brake Pads Replacement in the Service Manual 2. Scuff the rotors. 3. Perform the Brake Pad and Rotor Burnishing procedure. Refer to Brake Pad and Rotor Burnishing in the Service Manual Complete a minimum of 20 stop events. If you see GA9140, and this is a second visit, 1. Replace the front disc brake pads with the parts listed below, refer to Front Disc Brake Pads Replacement in the Service Manual 2. Scuff the rotors. 3. Perform the Brake Pad and Rotor Burnishing procedure. Refer to Brake Pad and Rotor Burnishing in the Service Manual Complete a minimum of 20 stop events. Page 2 August, 2022 Bulletin No.: 21-NA-142 Parts Information Causal Part Description Part Number Qty X Pad Kit-Frt Disc Brk 85520396 (Acadia, Blazer, Enclave, Traverse, XT5 and XT6 1 Pad Kit-Frt Disc Brk 85139417 (Colorado, Canyon) Warranty Information Repairs made for the specific concern within this bulletin will be covered for a period of 24 months or 24,000 miles or 40,000 km, whichever occurs first. Labor Operation Description Base Labor Time 2486258* Front Disc Brake Pads Replacement and Scuff Both Front Rotors Canyon/Colorado – 1.1 hr Enclave – 1.1 hr Traverse – 1.1 hr Blazer – 1.1 hr Acadia – 1.2 hr XT5 – 1.1 hr XT6 – 1.6 hr *This is a unique Labor Operation for Bulletin use only. Version 7 Modified Released June 21, 2021 Revised June 30, 2021 – Replaced LTG Labor Operation with Unique Bulletin Labor Operation Revised July 13, 2021 – Updated Parts Information with New Replacement Service Part # 85520396. Revised January 27, 2022 – Updated Breakpoints Revised March 09, 2022 – Changed Blazer End Breakpoint from Date to VIN. Revised April 14, 2022 – Added Note to Cause, Updated Correction, Increased Labor Time and Replaced Labor Operation Number. Revised August 23, 2022 – Added 2023 Model Year to All Models Except Colorado and Canyon. GM bulletins are intended for use by professional technicians, NOT a “do-it-yourselfer”. They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
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