Product Safety Recall N212340970 Incorrect Software Calibrations May Affect Certain Driving Assist Features – 2021 Chevrolet Tahoe & GMC Yukon

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Product Safety Recall
N212340970 Incorrect Software Calibrations May Affect Certain
Driving Assist Features
Copyright 2021 General Motors. All Rights Reserved. Page 1 of 7
Release Date:
August 2021
Revision:
01
Revision Description:
This bulletin was revised to add the customer notification letter. Please discard all copies of N212340970.
Attention:
There are only 2 vehicles involved in this safety recall. The VINs are below:
1GNSCNKD8MR105388
1GKS2DKL5MR129536
It is a violation of Federal law for a dealer to deliver a new motor vehicle or any new or used item of motor vehicle equipment (including a tire) covered by this notification under a sale or lease until the defect or noncompliance is remedied.
All involved vehicles that are in dealer inventory must be held and not delivered to customers, dealer traded, or used for demonstration purposes until the repair contained in this bulletin has been performed on the vehicle.
Make
Model
Model Year
RPO
Description
From
To
Chevrolet
Tahoe
2021
2021
GMC
Yukon
2021
2021
Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.
Condition
General Motors has decided that a defect which relates to motor vehicle safety exists in one 2021 model year Chevrolet Tahoe and one 2021 model year GMC Yukon. Dealer service technicians may have programmed these vehicles’ brake system control modules (BSCM) with incorrect calibrations. This condition may adversely impact the operation or sensitivity of certain vehicle systems, including electronic stability control, traction control, and anti-lock braking, or cause the loss of trailer braking while towing. Stability control, traction control, and anti-lock braking may not perform as intended in certain low traction conditions. Braking performance will be reduced when towing a trailer equipped with trailer brakes. There may be increased risk of a crash.
Correction
Dealers will reprogram the brake system control module with the correct software and calibration data files.
Parts
No parts are required for this repair.
Warranty Information
Labor Operation
Description
Labor Time
Trans. Type
Net Item
9105783
K160 Brake System Control Module Reprogramming or K17 Electronic Brake Control Module with SPS
0.3
ZFAT
N/A
Important: * To avoid warranty transaction rejections, carefully read and follow the instructions below:
• The Warranty Claim Code must be accurately entered in the “Warranty Claim Code” field of the transaction.
• When more than one Warranty Claim Code is generated for a programming event, it is required to document all Warranty Claim Codes in the “Correction” field on the job card. Dealers must also enter one of the codes in the “Warranty Claim Code field of the transaction, otherwise the transaction will reject. It is best practice to enter the FINAL code provided by SPS/SPS2.
Warranty Claim Code Information Retrieval
If the Warranty Claim Code was not recorded on the Job Card, the code can be retrieved in the SPS system as follows: 1. Open TIS/TLC on the computer used to program the vehicle. 2. Select and start SPS/SPS2. 3. Select Settings. 4. Select the Warranty Claim Code tab.
Product Safety Recall
N212340970 Incorrect Software Calibrations May Affect Certain
Driving Assist Features
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The VIN, Warranty Claim Code and Date/Time will be listed on a roster of recent programming events. If the code is retrievable, dealers should resubmit the transaction making sure to include the code in the SPS Warranty Claim Code field.
Service Procedure
Note: Carefully read and follow the instructions below.
• Ensure the programming tool is equipped with the latest software and is securely connected to the data link connector. If there is an interruption during programming, programming failure or control module damage may occur.
• Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. Install a GM Authorized Programming Support Tool to maintain system voltage. Refer to www.gmdesolutions.com for further information. If not available, connect a fully charged 12 V jumper or booster pack disconnected from the AC voltage supply. DO NOT connect a battery charger.
• Follow the on-screen prompts regarding ignition power mode but ensure that anything that drains excessive power (exterior lights, HVAC blower motor, etc) is off.
• Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection/Maintenance (I/M) system status indicators to NO.
Important: The service technician always needs to verify that the VIN displayed in the TLC left side drop down menu and the top center window match the VIN plate of the vehicle to be programmed prior to using Service Programming System 2 (SPS2) for programming or reprogramming a module.
• For the TLC application, service technicians need to always ensure that the power mode (ignition) is “ON” before reading the VIN from the vehicle’s VIN master module and that they do not select a VIN that is already in the TLC application memory from a previous vehicle.
• If the VIN that shows up in the TLC top center window after correctly reading the VIN from the vehicle does not match the VIN plate of the vehicle, manually type in the VIN characters from the vehicle VIN plate into the TLC top center window and use these for programming or reprogramming the subject module with the correct vehicle VIN and software and/or calibrations.
• The Engine Control Module (ECM) is the master module (for VIP vehicles) that TLC reads to determine the VIN of the vehicle. If the VIN read from the vehicle by TLC does not match the VIN plate of the vehicle, the ECM also needs to be reprogrammed with the correct VIN, software and calibrations that match the vehicle’s VIN plate.
• The Body Control Module (BCM) is the master module (for GEM vehicles) that TLC reads to determine the VIN of the vehicle. If the VIN read from the vehicle by TLC does not match the VIN plate of the vehicle, the BCM also needs to be reprogrammed with the correct VIN, software and calibrations that match the vehicle’s VIN plate.
Caution: Be sure the VIN selected in the drop-down menu (1) is the same as the vehicle connected (2) before beginning programming.
Product Safety Recall
N212340970 Incorrect Software Calibrations May Affect Certain
Driving Assist Features
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5743643
Important: If the vehicle VIN DOES NOT match, the message below will be shown.
5877000
5644477
Product Safety Recall
N212340970 Incorrect Software Calibrations May Affect Certain
Driving Assist Features
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5431207
Important: Techline Connect and TIS2WEB screens shown above.
Important: If the same calibration/software warning is noted on the TLC or SPS Summary screen, select OK and follow
screen instructions. After a successful programming event, the WCC is located in the Service Programming System
dialogue box of the SPS Summary screen. No further action is required. Refer to the Warranty section of the bulletin.
1. Reprogram the brake system control module. Refer to K160 Brake System Control Module: Programming and Setup
in SI.
5644478
Product Safety Recall
N212340970 Incorrect Software Calibrations May Affect Certain
Driving Assist Features
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5431209
Note: The screenshots above are an example of module programming and may not be indicative of the specific module that is being programmed. Module selection and VIN information have been blacked out.
Important: To avoid warranty transaction rejections, you MUST record the warranty claim code provided on the Warranty Claim Code (WCC) screen shown above on the job card. Refer to callout 1 above for the location of the WCC on the screen.
2. Record SPS Warranty Claim Code on job card for warranty transaction submission.
Dealer Responsibility – For USA & Export (USA States, Territories, and Possessions)
It is a violation of Federal law for a dealer to deliver a new motor vehicle or any new or used item of motor vehicle equipment (including a tire) covered by this notification under a sale or lease until the defect or noncompliance is remedied.
The US National Traffic and Motor Vehicle Safety Act provides that each vehicle that is subject to a recall of this type must be adequately repaired within a reasonable time after the customer has tendered it for repair. A failure to repair within sixty days after tender of a vehicle is prima facie evidence of failure to repair within a reasonable time. If the condition is not adequately repaired within a reasonable time, the customer may be entitled to an identical or reasonably equivalent vehicle at no charge or to a refund of the purchase price less a reasonable allowance for depreciation. To avoid having to provide these burdensome remedies, every effort must be made to promptly schedule an appointment with each customer and to repair their vehicle as soon as possible. In the recall notification letters, customers are told how to contact the US National Highway Traffic Safety Administration if the recall is not completed within a reasonable time.
Dealer Responsibility – All
All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers’ possession and subject to this recall must be held and inspected/repaired per the service procedure of this bulletin before customers take possession of these vehicles. Involved vehicles must be held and not delivered to customers, dealer-traded, released to auction, used for demonstration, or any other purpose.
All GM Certified Used vehicles currently in the dealers’ inventory within the Certified Pre-Owned Inventory System (CPOIS) will be de-certified and must be held and remedied per the service procedure in this bulletin. Upon submitting an accepted/paid warranty transaction in the Global Warranty Management (GWM) system, the vehicle can be re-certified for sale within the CPOIS system, or once again be used in the CTP program.
Product Safety Recall
N212340970 Incorrect Software Calibrations May Affect Certain
Driving Assist Features
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Dealers are to service all vehicles subject to this recall at no charge to customers, regardless of mileage, age of vehicle, or ownership, from this time forward.
Customers who have recently purchased vehicles sold from your vehicle inventory, and for which there is no customer information indicated on the dealer listing, are to be contacted by the dealer. Arrangements are to be made to make the required correction according to the instructions contained in this bulletin. A copy of the customer letter is provided in this bulletin for your use in contacting customers. Recall follow-up cards should not be used for this purpose, since the customer may not as yet have received the notification letter. In summary, whenever a vehicle subject to this field action enters your vehicle inventory you must take the steps necessary to ensure the program correction has been made before selling the vehicle. In addition, for vehicles entering your facility for service, you are required to ensure the customer is aware of the open field action and make every reasonable effort to implement the program correction as set forth in this bulletin prior to releasing the vehicle.
Dealer Reports
For dealers with involved vehicles, a listing has been prepared and will be available through GM GlobalConnect Maxis Field Action Reports or sent directly to export dealers. The Inventory tab of the dealer reports will contain VINs that apply to this recall. This information is intended to assist dealers with the PROMPT COMPLETION of these vehicles. The Customer In-Service tab will contain customer names and addresses from Motor Vehicle Registration Records. The use of such motor vehicle registration data for any purpose other than follow-up necessary to complete this recall may be a violation of law in several states.
Courtesy Transportation – For USA & Canada
Courtesy transportation is available for customers whose vehicles are involved in a product program and still within the warranty coverage period. See General Motors Service Policies and Procedures Manual for courtesy transportation program details.
Customer Notification
USA & Canada – General Motors will notify customers of this recall on their vehicle (see copy of customer letter included with this bulletin).
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 tools, equipment, 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 dealer for information on whether your vehicle may benefit from the information.
We Support Voluntary Technician Certification
Product Safety Recall
N212340970 Incorrect Software Calibrations May Affect Certain
Driving Assist Features
Page 7 of 7
IMPORTANT SAFETY RECALL
August 2021
This notice applies to your vehicle, VIN: _____________________________________
Dear General Motors Customer:
This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.
General Motors has decided that a defect, which relates to motor vehicle safety, exists in certain 2021 model year Chevrolet Tahoe and GMC Yukon vehicles. As a result, GM is conducting a safety recall. We apologize for this inconvenience. However, we are concerned about your safety and continued satisfaction with our products.
IMPORTANT
• Your vehicle is involved in GM safety recall N212340970.
• Schedule an appointment with your GM dealer.
• This service will be performed for you at no charge.
Why is your vehicle being recalled?
Dealer service technicians programmed these vehicles’ brake system control modules (BSCM) with incorrect calibrations. This condition adversely impacts the operation or sensitivity of certain vehicle systems, including electronic stability control, traction control, and anti-lock braking, or cause the loss of trailer braking while towing, increasing the risk of a crash.
What will we do?
Your GM dealer will reprogram the brake system control module with the correct software and calibration data files free of charge. Because of service scheduling requirements, it is likely that your dealer will need your vehicle longer than the actual service correction time of approximately 25 minutes.
What should you do?
You should contact your GM dealer to arrange a service appointment as soon as possible.
Do you have questions?
If you have questions or concerns that your dealer is unable to resolve, please contact the appropriate Customer Assistance Center at the number listed below.
Division
Number
Text Telephones (TTY)
Chevrolet
1-800-630-2438
1-800-833-2438
GMC
1-866-996-9463
1-800-462-8583
Puerto Rico – English
1-800-496-9992
Puerto Rico – Español
1-800-496-9993
Virgin Islands
1-800-496-9994
If after contacting your dealer and the Customer Assistance Center, you are still not satisfied we have done our best to remedy this condition without charge and within a reasonable time, you may wish to write the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, SE, Washington, DC 20590, or call the toll-free Vehicle Safety Hotline at 1.888.327.4236 (TTY 1.800.424.9153), or go to https://www.safercar.gov. The National Highway Traffic Safety Administration Campaign ID Number for this recall is 21V579.
Federal regulation requires that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten days.
Regina A. Carto
Vice President
Global Product Safety and Systems
GM Recall: N212340970
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IMPORTANT SAFETY RECALL
August 2021
This notice applies to your vehicle, VIN: _____________________________________
Dear General Motors Customer:
This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.
General Motors has decided that a defect, which relates to motor vehicle safety, exists in certain 2021 model year Chevrolet Tahoe and GMC Yukon vehicles. As a result, GM is conducting a safety recall. We apologize for this inconvenience. However, we are concerned about your safety and continued satisfaction with our products.
IMPORTANT
• Your vehicle is involved in GM safety recall N212340970.
• Schedule an appointment with your GM dealer.
• This service will be performed for you at no charge.
Why is your vehicle being recalled?
Dealer service technicians programmed these vehicles’ brake system control modules (BSCM) with incorrect calibrations. This condition adversely impacts the operation or sensitivity of certain vehicle systems, including electronic stability control, traction control, and anti-lock braking, or cause the loss of trailer braking while towing, increasing the risk of a crash.
What will we do?
Your GM dealer will reprogram the brake system control module with the correct software and calibration data files free of charge. Because of service scheduling requirements, it is likely that your dealer will need your vehicle longer than the actual service correction time of approximately 25 minutes.
What should you do?
You should contact your GM dealer to arrange a service appointment as soon as possible.
Do you have questions?
If you have questions or concerns that your dealer is unable to resolve, please contact the appropriate Customer Assistance Center at the number listed below.
Division
Number
Text Telephones (TTY)
Chevrolet
1-800-630-2438
1-800-833-2438
GMC
1-866-996-9463
1-800-462-8583
Puerto Rico – English
1-800-496-9992
Puerto Rico – Español
1-800-496-9993
Virgin Islands
1-800-496-9994
If after contacting your dealer and the Customer Assistance Center, you are still not satisfied we have done our best to remedy this condition without charge and within a reasonable time, you may wish to write the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, SE, Washington, DC 20590, or call the toll-free Vehicle Safety Hotline at 1.888.327.4236 (TTY 1.800.424.9153), or go to https://www.safercar.gov. The National Highway Traffic Safety Administration Campaign ID Number for this recall is 21V579.
Federal regulation requires that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten days.
Regina A. Carto
Vice President
Global Product Safety and Systems
GM Recall: N212340970
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GLOBAL SAFETY FIELD INVESTIGATIONS
DCS5881
URGENT – DISTRIBUTE IMMEDIATELY
Date: July 29, 2021
Subject: N212340970 – Safety Recall
Incorrect Software Calibrations May Affect Certain Driving Assist Features
Models: 2021 Chevrolet Tahoe
2021 GMC Yukon
To: All General Motors Dealers
General Motors is releasing Safety Recall N212340970 today. The total number of U.S. vehicles involved is 2 and are customer driven. Please see the attached bulletin for details.
Question and Answer Document (Q&A)
Attached to this message you will find a document that addresses the ten most likely questions customers may have regarding this Safety Recall. Please use this information as an aid to confidently answer customer concerns.
Customer Letter Mailing
The customer letter mailing will begin in the near future.
Global Warranty Management (GWM)
The Required Field Action section on the Investigate Vehicle History (IVH) screen will be updated July 30, 2021 or sooner. Please hold all warranty transactions until IVH has been updated.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS
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GLOBAL SAFETY FIELD INVESTIGATIONS
DCS5899
URGENT – DISTRIBUTE IMMEDIATELY
Date: August 16, 2021
Subject: REVISION – N212340970 01 – Safety Recall
Incorrect Software Calibrations May Affect Certain Driving Assist Features
Customer Letter Added
Models: 2021 Chevrolet Tahoe and GMC Yukon
To: All General Motors Dealers
This bulletin has been revised to add a copy of the customer notification letter. Please discard all copies of N212340970. There are only 2 vehicles involved in this safety recall.
Customer Letter Mailing
The customer letter mailing will begin on August 27, 2021.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS
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