June 3, 2021 NHTSA CAMPAIGN NUMBER: 21V421000
Air Bag Light May Not Indicate Malfunction
The air bag malfunction indicator light may fail to warn the driver of a problem with the air bag, increasing the risk of injury.
NHTSA Campaign Number: 21V421
Manufacturer General Motors
, LLC
Components ELECTRICAL SYSTEM, AIR BAGS
Potential Number of Units Affected 285,622
Summary
General Motors, LLC (GM) is recalling certain 2021 Buick Envision, Cadillac CT4, CT5, Escalade, Escalade ESV, Chevrolet Tahoe, Corvette, Suburban, GMC Yukon, Yukon XL vehicles. The communications gateway module incorrectly processes a loss of communication with the sensing diagnostic module (SDM), causing the air bag malfunction indicator light to inconsistently illuminate.
Remedy
Dealers will update the software in the communications gateway module, free of charge. Owner notification letters were mailed on July 1, 2021. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM’s number for this recall is N212338110.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Check if your Vehicle has a Recall
Condition
General Motors has decided that a defect which relates to motor vehicle safety exists in certain 2021 model year Buick Envision vehicles; Cadillac CT4, CT5, Escalade, and Escalade ESV vehicles; Chevrolet Corvette, Suburban, and Tahoe vehicles; and GMC Yukon and Yukon XL vehicles. A software problem exists in certain of these vehicles which would cause a sensing diagnostic module (SDM) communications fault to illuminate the airbag malfunction indicator lamp, but only on alternating ignition cycles. As a result, an SDM communications fault would not consistently illuminate the airbag light on every ignition cycle to indicate a problem to the driver. A driver might not be warned of an SDM loss of communication fault which might indicate a problem with airbag deployment. If airbags do not deploy appropriately in a crash, there is an increased risk of injury in that crash.
Correction
GM will update the software in the vehicles’ serial data gateway module. Owners who have accepted applicable terms and conditions will have the opportunity to accept these software changes using wireless over-the-air (OTA) technology without having to bring their vehicle to a dealership. Alternatively, owners may schedule to have the updates performed at a GM dealer.
Parts
No parts are required for this repair.
GM Recall N212338110
Driver Information Center Messaging for Over-The-Air Update
Owners who have accepted applicable terms and conditions will have the opportunity to accept software changes to address recall N212338110 using wireless over-the-air (OTA) technology without having to bring their vehicle to a dealership.
Initial Pop Up Screen Text:
- Vehicle update is available. Install time: 15 mins
- Learn More [selectable]
- Install Update [selectable]
Install Screen #1 Text:
- Important Update for GM Recall No. N21-2338110 Details [selectable]
- Install time: 15 mins
The vehicle will need to remain parked and turned off during the update
- Remind Me Later [selectable]
- Install Update [selectable]
Update Detail Screen Text:
- Important Update for GM Recall No. N21-2338110
- This important update corrects a software problem that may prevent the airbag light from illuminating. If the airbag light does not illuminate, a driver would not be warned of a fault which might indicate a problem with airbag performance in a crash. This update will correct that condition, which is subject to GM Recall No. N21-2338110. You will receive a letter providing additional details regarding this issue. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
- Install time: 15 mins
The vehicle will need to remain parked and turned off during the update
- Remind Me Later [selectable]
- Install Update [selectable]
Decline Update Screen Text:
- If you decline this update, you will no longer be able to install it. If you would like to install this update later. You will need to contact your dealer for assistance.
- Cancel [selectable]
- Decline Update [selectable]
Install Screen #2 Text:
- Update may take up to 15 minutes. Park in a secure location. Your vehicle will be disabled, cannot be driven, and features like door locks, windows, and chimes may not work. If you leave the vehicle, do not lock occupants inside.
- Cancel [selectable]
- Install Now [selectable]
Vehicle State Screen Text:
- Installing Update Turn the vehicle Off.
- Vehicle In Park
- Vehicle Off
- Programming
- Update Complete
Frequently Asked Questions (FAQs) for Safety Recall N212338110
Airbag Light May Not Indicate Malfunction
These questions and answers are being provided to help GM dealers respond to inquiries from involved vehicle owners about the Safety recall identified above.
Q1) Which vehicles are involved?
General Motors has decided that a defect which relates to motor vehicle safety exists in certain 2021 model year Buick Envision vehicles; Cadillac CT4, CT5, Escalade, and Escalade ESV vehicles; Chevrolet Corvette, Suburban, and Tahoe vehicles; and GMC Yukon and Yukon XL vehicles.
Q2) What is the issue or condition?
A software problem exists in certain of these vehicles which would cause a sensing diagnostic module (SDM) communications fault to illuminate the airbag malfunction indicator lamp, but only on alternating ignition cycles. As a result, an SDM communications fault would not consistently illuminate the airbag light on every ignition cycle to indicate a problem to the driver.
Q3) What symptoms may be experienced? What warning signs may be associated with the issue or condition described?
If a consistent SDM communication fault occurs, drivers will only be warned of a fault on alternate ignition cycles. Loss of communication with the SDM may result in other driver information center (DIC) messages that will be present on every ignition cycle.
Q4) What is the remedy/repair?
GM will update the software in the vehicles’ serial data gateway module. Owners who have accepted applicable terms and conditions will have the opportunity to accept these software changes using wireless over-the-air (OTA) technology without having to bring their vehicle to a dealership. Alternatively, owners may schedule to have the updates performed at a GM dealer.
Q5) What is the safety risk? Is the vehicle safe to drive?
A driver might not be warned of an SDM loss of communication fault which might indicate a problem with airbag deployment. If airbags do not deploy appropriately in a crash, there is an increased risk of injury in that crash.
Q6) Does the customer have to pay for this remedy/repair?
No, this inspection/repair will be done at no cost to the customer.
Q7) Is the remedy/repair available now?
Yes, please see the attached bulletin for details.
Q8) What should customers do until recall repairs can be completed? Are there any special instructions?
If special instructions are provided, they will be included in the notification letters to customers.
Q9) How can customers check to see if their vehicle is involved in this field action?
Customers who own a vehicle involved in the field action will be notified by mail by General Motors, but they may also check their Vehicle Identification Number (VIN) for field actions in GM Owner Center at https://my.gm.com/recalls or via NHTSA’s website at https://vinrcl.safercar.gov/vin/.
Q10) If customers are concerned, can they get a rental car or courtesy transportation?
Courtesy transportation is available for customers whose vehicles are involved in this recall and are within the warranty coverage period for the warranty which is associated with this recall. Please refer to Warranty Administration Bulletin #17-NA-073: Field Action Courtesy Transportation Policy for further information.
SEOCONTENT-START
Product Safety Recall
N212338110 Airbag Light May Not Indicate Malfunction
Copyright 2021 General Motors. All Rights Reserved. Page 1 of 9
Release Date:
June 2021
Revision:
01
Revision Description: This bulletin is being revised to add the customer letter. Please discard all previous copies of N212338110.
Attention:
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.
Involved vehicles will be repaired either through dealer repairs as described in this bulletin or through over the air (OTA) programming. Dealers can and should perform the procedure in this bulletin on any vehicle with an “open” status on the Investigate Vehicle History (IVH) screen in GM Global Warranty Management system. Due to the fact that vehicles will be closed in IVH through successful OTA programming, dealers should always check the status in IVH before performing any vehicle repairs.
Make
Model
Model Year
RPO
Description
From
To
Buick
Envision
2021
2021
Cadillac
CT4
Cadillac
CT5
Cadillac
Escalade, Escalade ESV
Chevrolet
Corvette
Chevrolet
Suburban
Chevrolet
Tahoe
GMC
Yukon, Yukon XL
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 certain 2021 model year Buick Envision vehicles; Cadillac CT4, CT5, Escalade, and Escalade ESV vehicles; Chevrolet Corvette, Suburban, and Tahoe vehicles; and GMC Yukon and Yukon XL vehicles. A software problem exists in certain of these vehicles which would cause a sensing diagnostic module (SDM) communications fault to illuminate the airbag malfunction indicator lamp, but only on alternating ignition cycles. As a result, an SDM communications fault would not consistently illuminate the airbag light on every ignition cycle to indicate a problem to the driver. A driver might not be warned of an SDM loss of communication fault which might indicate a problem with airbag deployment. If airbags do not deploy appropriately in a crash, there is an increased risk of injury in that crash.
Correction
GM will update the software in the vehicles’ serial data gateway module. Owners who have accepted applicable terms and conditions will have the opportunity to accept these software changes using wireless over-the-air (OTA) technology without having to bring their vehicle to a dealership. Alternatively, owners may schedule to have the updates performed at a GM dealer.
Parts
No parts are required for this repair.
Warranty Information
Labor Operation
Description
Labor Time
Trans. Type
Net Item
9105682*
Verified Module Software or Calibration Level: Module Is Programmed with Same Level Software or Calibration
0.2
ZFAT
N/A
9105683*
Serial Data Gateway Module Reprogramming with SPS
0.4
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.
Product Safety Recall
N212338110 Airbag Light May Not Indicate Malfunction
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• 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.
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.
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
N212338110 Airbag Light May Not Indicate Malfunction
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5743643
5644477
Product Safety Recall
N212338110 Airbag Light May Not Indicate Malfunction
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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.
Note: Be sure to perform both Programming Part 1 and Programming Part 2 and submit both warranty claim codes.
1. Reprogram the serial data gateway module. Refer to K56 Serial Data Gateway Module: Programming and Setup in SI.
Product Safety Recall
N212338110 Airbag Light May Not Indicate Malfunction
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5644478
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.
Product Safety Recall
N212338110 Airbag Light May Not Indicate Malfunction
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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.
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.
Product Safety Recall
N212338110 Airbag Light May Not Indicate Malfunction
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Customer Notification
USA & Canada – General Motors will notify customers of this recall on their vehicle (see copy of customer letter included with this bulletin).
Export – Letters will be sent to known owners of record located within areas covered by the US National Traffic and Motor Vehicle Safety Act. . For owners outside these areas, dealers should notify customers using the attached sample letter.
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
N212338110 Airbag Light May Not Indicate Malfunction
Page 8 of 9
IMPORTANT SAFETY RECALL
July 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 Buick Envision vehicles; Cadillac CT4, CT5, Escalade, and Escalade ESV vehicles; Chevrolet Corvette, Suburban, and Tahoe vehicles; and GMC Yukon and Yukon XL 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 N212338110.
• A software update is available for your vehicle that can be performed remotely with wireless over-the-air technology. If you’ve already accepted the update, no further action is necessary. If you have not accepted the update, follow the in-vehicle radio prompts or schedule an appointment with your dealer.
• This service will be performed for you at no charge.
Why is your vehicle being recalled?
A software problem exists in certain of these vehicles which would cause a sensing diagnostic module (SDM) communications fault to illuminate the airbag malfunction indicator lamp, but only on alternating ignition cycles. As a result, an SDM communications fault would not consistently illuminate the airbag light on every ignition cycle to indicate a problem to the driver. A driver might not be warned of an SDM loss of communication fault which might indicate a problem with airbag deployment. If airbags do not deploy appropriately in a crash, there is an increased risk of injury in that crash.
What will we do?
GM will update the software in the vehicles’ serial data gateway module. Owners who have accepted the applicable terms and conditions may have already received the update with wireless over-the-air technology and will not have to bring their vehicle to a dealership. GM began prompting owners through the vehicle’s radio screen on June 3, 2021. Any owner having received this update through over the air (OTA) technology will not have to bring their vehicle to a dealership. Alternatively, owners may schedule to have the updates performed at a GM dealer.
What should you do?
The software update can be performed remotely using wireless over-the-air technology. If you’ve already accepted the update, no further action is necessary. If you have not accepted the update, you will be notified that the update is available by in-vehicle prompts from the radio display.
This software update is a two-step process which consists of downloading the software update to your vehicle, and then installing it. First, you’ll be prompted to accept the software download. In order to successfully accept the download, your vehicle must be parked. After you accept the download, and throughout the downloading process, the vehicle may be driven and operated as normal. Once the download is complete, you’ll be asked to accept the software installation. The vehicle must be parked when you accept the installation. It must remain parked, with the ignition in the OFF position, throughout the installation process. Installation will only take up to 15 minutes, and you do not have to stay in your vehicle while the software
Product Safety Recall
N212338110 Airbag Light May Not Indicate Malfunction
Page 9 of 9
is installing. Your vehicle will not be operational during the installation process, and must remain parked while the software is installing to your vehicle.
Once the software update is complete, please know that you may need to reconfigure certain vehicle settings or preferences, as they may have been altered as a result of the update. Upon your next ignition cycle after the installation completes, your vehicle’s radio will display a confirmation message that the update was successful. If you receive a message that the installation cannot continue or did not complete successfully, the installation process may retry after your next ignition cycle. If the problem persists, contact your dealer to arrange a service appointment as soon as possible.
You can also decline the update by selecting the “Learn More” button, and then “Details” and then the “Decline Update” option. If you decline the update, contact your dealer to arrange a service appointment as soon as possible.
If you need to bring your vehicle to the dealer, it is likely that your dealer will need your vehicle longer than the actual service correction time of approximately 30 minutes.
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)
Buick
1-866-608-8080
1-800-832-8425
Cadillac
1-866-982-2339
1-800-833-2622
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 21V421.
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: N212338110
********************************************************************************************************************
GLOBAL SAFETY FIELD INVESTIGATIONS
DCS5817
URGENT – DISTRIBUTE IMMEDIATELY
Date: June 3, 2021
Subject: N212338110 – Safety Recall
Airbag Light May Not Indicate Malfunction
Models: 2021 Buick Envision
2021 Cadillac CT4
2021 Cadillac CT5
2021 Cadillac Escalade, Escalade ESV
2021 Chevrolet Corvette
2021 Chevrolet Suburban
2021 Chevrolet Tahoe
2021 GMC Yukon, Yukon XL
To: All General Motors Dealers
General Motors is releasing Safety Recall N212338110 today. The total number of U.S. vehicles involved is approximately 282,309. 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.
Global Warranty Management (GWM)
The Required Field Action section on the Investigate Vehicle History (IVH) screen will be updated June 4, 2021 or sooner. The remedy involves a software update which will be downloaded to the affected vehicles through an over the air (OTA) programming event beginning the evening of June 3, 2021. Vehicles successfully programmed on June 3, 2021 through OTA will show as “closed” status in IVH on Friday morning, June 4th at approximately 7:30am (EST). A list of involved vehicles in dealer new inventory NOT successfully programmed via OTA will be provided to the affected dealers on Friday, June 4th. Dealers can and should perform this safety bulletin on any vehicle with an “open” status in IVH. Due to the fact that vehicles will be closed in IVH through successful OTA programming, dealers should always check the status in IVH before performing any vehicle repairs.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS
********************************************************************************************************************
This is a representative letter. Customer letters are personalized and list specific model, model year and VIN.
IMPORTANT SAFETY RECALL
July 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 Buick Envision vehicles; Cadillac CT4, CT5, Escalade, and Escalade ESV vehicles; Chevrolet Corvette, Suburban, and Tahoe vehicles; and GMC Yukon and Yukon XL 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 recall N212338110.
• A software update is available for your vehicle that can be performed remotely with wireless over-the-air technology. If you’ve already accepted the update, no further action is necessary. If you have not accepted the update, follow the in-vehicle radio prompts or schedule an appointment with your GM dealer.
• This service will be performed for you at no charge.
Why is your vehicle being recalled?
A software problem exists in certain of these vehicles which would cause a sensing diagnostic module (SDM) communications fault to illuminate the airbag malfunction indicator lamp, but only on alternating ignition cycles. As a result, an SDM communications fault would not consistently illuminate the airbag light on every ignition cycle to indicate a problem to the driver. A driver might not be warned of an SDM loss of communication fault which might indicate a problem with airbag deployment. If airbags do not deploy appropriately in a crash, there is an increased risk of injury in that crash.
What will we do?
GM will update the software in the vehicles’ serial data gateway module. Owners who have accepted the applicable terms and conditions may have already received the update with wireless over-the-air technology and will not have to bring their vehicle to a dealership. GM began prompting owners through the vehicle’s radio screen on June 3, 2021. Any owner having received this update through over the air (OTA) technology will not have to bring their vehicle to a dealership. Alternatively, owners may schedule to have the updates performed at a GM dealer.
What should you do?
The software update can be performed remotely using wireless over-the-air technology. If you’ve already accepted the update, no further action is necessary. If you have not accepted the update,
you will be notified that the update is available by in-vehicle prompts from the radio display.
This software update is a two-step process which consists of downloading the software update to your vehicle, and then installing it. First, you’ll be prompted to accept the software download. In order to successfully accept the download, your vehicle must be parked. After you accept the download, and throughout the downloading process, the vehicle may be driven and operated as normal. Once the download is complete, you’ll be asked to accept the software installation. The vehicle must be parked when you accept the installation. It must remain parked, with the ignition in the OFF position, throughout the installation process. Installation will only take up to 15 minutes, and you do not have to stay in your vehicle while the software is installing. Your vehicle will not be operational during the installation process, and must remain parked while the software is installing to your vehicle.
Once the software update is complete, please know that you may need to reconfigure certain vehicle settings or preferences, as they may have been altered as a result of the update.
Upon your next ignition cycle after the installation completes, your vehicle’s radio will display a confirmation message that the update was successful. If you receive a message that the installation cannot continue or did not complete successfully, the installation process may retry after your next ignition cycle. If the problem persists, contact your GM dealer to arrange a service appointment as soon as possible.
You can also decline the update by selecting the “Learn More” button, and then “Details” and then the “Decline Update” option. If you decline the update, contact your GM dealer to arrange a service appointment as soon as possible.
If you need to bring your vehicle to the dealer, it is likely that your dealer will need your vehicle longer than the actual service correction time of approximately 30 minutes.
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)
Cadillac
1-866-982-2339
1-800-833-2622
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 21V421.
Federal regulation requires that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten days.
Maryann Combs
Vice President
Global Vehicle Safety
GM Recall N212338110
********************************************************************************************************************
GLOBAL SAFETY FIELD INVESTIGATIONS
DCS5861
URGENT – DISTRIBUTE IMMEDIATELY
Date: July 6, 2021
Subject: REVISION – N212338110-01 – Safety Recall
Airbag Light May Not Indicate Malfunction
Customer Letter Added and Population Expansion
Models: 2021 Buick Envision
2021 Cadillac CT4
2021 Cadillac CT5
2021 Cadillac Escalade, Escalade ESV
2021 Chevrolet Corvette
2021 Chevrolet Suburban
2021 Chevrolet Tahoe
2021 GMC Yukon, Yukon XL
To: All General Motors Dealers
Bulletin N212338110-01 has been revised to include a copy of the customer notification letter. Please discard all copies of bulletin N212338110.
Additional 2021 model year Buick Envision vehicles have been added to this safety recall. The attached revised list provides the Vehicle Identification Number (VIN) of all involved vehicles in dealer new inventory. If your dealership’s BAC is not listed, then none of the additional involved vehicles are currently assigned to you and no further action is required.
This remedy involves a software update which is being downloaded to the affected vehicles through an over the air (OTA) programming event. Dealers can and should perform this safety bulletin on any vehicle with an “open” status in IVH. Due to the fact that vehicles will be closed in IVH through successful OTA programming, dealers should always check the status in IVH before performing any vehicle repairs.
Customer Letter Mailing
The customer letter mailing started on July 1, 2021.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS
********************************************************************************************************************
SEOCONTENT-END
10 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| BUICK | ENVISION | 2021 |
| CADILLAC | CT4 | 2021 |
| CADILLAC | CT5 | 2021 |
| CADILLAC | ESCALADE | 2021 |
| CADILLAC | ESCALADE ESV | 2021 |
| CHEVROLET | CORVETTE | 2021 |
| CHEVROLET | SUBURBAN | 2021 |
| CHEVROLET | TAHOE | 2021 |
| GMC | YUKON | 2021 |
| GMC | YUKON XL | 2021 |
13 Associated Documents
ISSUED Owner Notification Letter(Part 577)
RCONL-21V421-9011.pdf 138.263KB
Recall Acknowledgement
RCAK-21V421-6020.pdf 778.096KB
Manufacturer Notices(to Dealers,etc) – Dealer Message re N212338110 – Safety Recall Airbag Light May Not Indicate Malfunction
Miscellaneous Document – Screen Message re GM Recall N212338110 Driver Information Center Messaging for Over-The-Air Update
RMISC-21V421-5275.pdf 170.837KB
Defect Notice 573 Report
RCLRPT-21V421-6219.PDF 218.166KB
Miscellaneous Document – Frequently Asked Questions (FAQs) for Safety Recall N212338110 Airbag Light May Not Indicate Malfunction
RMISC-21V421-8941.pdf 104.602KB
Safety Bulletin – N212338110 Airbag Light May Not Indicate Malfunction
RCSB-21V421-0157.pdf 545.766KB
Manufacturer Notices(to Dealers,etc) – Dealer Message – REVISION N212338110-01 Safety Recall Airbag Light May Not Indicate Malfunction Customer Letter Added and Population Expansion
ISSUED Owner Notification Letter(Part 577)
RCONL-21V421-5696.pdf 138.263KB
Safety Bulletin – Product Safety Recall N212338110 Airbag Light May Not Indicate Malfunction
RCSB-21V421-0386.pdf 569.321KB
Miscellaneous Document – Frequently Asked Questions (FAQs) for Safety Recall N212338110 Airbag Light May Not Indicate Malfunction
RMISC-21V421-7186.pdf 104.602KB
Recall Quarterly Report #2, 2021-4
RCLQRT-21V421-1747.PDF 211.256KB
Recall Quarterly Report #1, 2021-3
RCLQRT-21V421-8460.PDF 211.152KB
Latest Recalls Documents
Reprogramming
GM Diagnostic/Programming (TIS2Web)
Approved J2534 Device with TIS2WEB can reprogram 1996 and later All GM Modules.
To obtain the latest electronic controller calibration information for your vehicle, go to https://tis2web.service.gm.com/tis2web and enter the vehicle's 17 character Vehicle Identification Number (VIN) and select 'Get CAL ID’.
You can then compare the latest part number with the actual number installed on the vehicle to determine if a reprogram is needed.
The Service Programming System (SPS) application is part of the TIS2Web system. To program an ECU, the SPS application must communicate with the vehicle control modules using the proper J2534 programming interface tool.
The Tech 2 supports model years 1996 and beyond. With the addition of the CAN Diagnostic Interface (CANdi) module, Tech 2 is fully backward compatible with current Tech 2 functionality and operates transparently when diagnosing non-CAN-equipped vehicles.
Servicing the next generation Global A vehicles will require the diagnostic software, GDS2, Global Diagnostic System 2 running on a local PC device while the MDI is connected to the vehicle. The GM MDI is the Global Diagnostic tool for future vehicles starting with Global A vehicles.
The GM MDI was introduced in the fall of 2007 for Pass-Thru programming and offers faster programming speed. It can be used to perform Pass-Thru programming on all vehicles built since 1996 and into the future. Click here to view a list of GDS supported vehicles.
www.acdelcotds.com
- Advanced VCI Box, Industry-leading J2534 Pass-Thru Technology: This J2534 Pass-Thru Programmer is designed espically for technicians, independent shop owners, and DIY enthusiasts, enables fast, reliable computer-based programming. It supports all J2534 protocols—including the latest DoIP and CAN FD—ensuring full compatibility with both legacy and next-generation vehicles.
- High-Speed OEM-Level Diagnostics & Programming: Unlock true OEM functionality with comprehensive system diagnostics, guided troubleshooting, coding, adaptations, resets, and programming—all designed to slash repair time. This all-in-one tool eliminates the need for multiple OEM devices, boosting efficiency and cutting costs. Equipped with High-Speed USB, it delivers 10x more data per second than competing solutions
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- User-Friendly RLink Platform & Expert Support: TOPDON’s proprietary driver management platform offers a clean interface and lifetime free updates. Access a rich library of real-world case studies to stay ahead of the curve. Backed by a support team with 10+ years of J2534 and automotive repair experience, we provide one-on-one assistance to resolve any technical issue.
- 6.6 ft USB-C Cable & Portable Storage Case: The RLink J2534 diagnostic tool features a 6.6ft USB 2.0 Cable and a 1.2 ft OBDII Extension Cable, allows to connection your computer easily outside the vehicle. The included handled carry case offers easy portability, storage, and hanging options—keeping your gear clean and ready to go, anywhere.
- J2534 Pass-Thru Programmer: TOPDON RLink J2534 is an advanced diagnostic and reprogramming tool that support all J2534 protocols, as well as D-PDU, CAN-FD and DoIP, ensuring compatibility with a wide range of modern vehicles. It offers extensive versatility with support for over 18 major automotive brands, including Chrysler, Ford, GM, Nissan, Toyota, Honda, Subaru, Land Rover/Jaguar, Volvo, Wuling, Volkswagen/Audi, Mercedes-Benz, and BMW. NOTE: Not compatible with Ford IDS diagnostic software
- All-in-One OEM Diagnostics: This J2534 ECU programming tool elevates your automotive repair capabilities to new heights by delivering complete OEM diagnosis. Boasting comprehensive full-system diagnostics, intuitive repair guides, advanced ECU programming and coding, common reset services, a vast library of repair information and more, this all-in-one solution empowers technicians to effortlessly tackle complex vehicle issues with ease. *Not compatible with 24V vehicles
- Proven Performance You Can Trust: Backed by over 10000 real vehicle tests and benefit from a wealth of practical experience, this OEM reprogramming tool guarantees stable and exceptional performance. Supported by TOPDON's dedicated technical experts with in-depth knowledge of both auto repair and J2534 Pass-Thru programming, the RLink J2534 provides prompt and professional assistance, ensuring a smooth setup and reliable compatibility
- Integrated Excellence, Always Up-to-Date: Featuring the exclusive RLink Platform to provide a streamlined experience with one-click driver installation and management, ensuring flawless integration with your OE software, maintaining the original performance quality. The built-in operation guide makes mastering OE software quick and easy, so you can get started right away. Plus, with lifetime free updates, your diagnostics will stay current with the latest drivers and innovations
- Efficiency Meets Versatility: Engineered to support three CAN channels simultaneously - CAN FD and CAN-CC included, giving you the edge in fast troubleshooting. To perfectly synchronized with the OE software, please diagnose with active subscriptions and make sure your computer system is running a compatible 64-bit Windows version (7, 8, 10 or later) to fully leverage the power of RLink J2534. *We don't provide extra OE software
- Dual WiFi & 10.1" Touchscreen: Provides a stable, high-speed wireless link 3x faster than bluetooth, and a responsive, professional interface. Topdon ONE obd2 scanner diagnostic tool ensures smooth, non-lagging diagnostic scan, boosting mechanic efficiency
- J2534 Pass-Thru Support: The included ONE VCI supports the J2534 standard, allowing it to function as a pass-thru device when paired with OEM diagnostic software.Through TOPDON’s RLink platform, technicians can perform dealer-level coding, expanding in-house capabilities without investing in multiple factory automotive scan tools
- OE Topology Mapping: Visualize the vehicle’s ECU network exactly as it’s built.Zoom, pan, and highlight specific modules to pinpoint component issues with precision.Topology mapping displays real-time communication between modules
- 50 Plus Service Functions: Covers high-demand services like ADAS calibration, DPF regen, TPMS reset, ABS bleed, and throttle adaptation.Expands your service menu, allows you to charge premium rates, and turns away zero jobs due to lack of tooling. Vehicle-specific functionality may vary
- Advaned ECU Coding: 10 of the most serviced brands in North America, including full ECU coding and flash hidden support for BMW, VW, Au-di, Benz, Porsche, Toyota, Ni ssan and more. Enables module replacement, feature customization, and personal settings with automatic backup or restore.Lets your shop safely offer high-margin customization services, attracting more customers and boosting profit
Last update on 2026-06-07 / Affiliate links / Images from Amazon Product Advertising API
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