N212351211

GLOBAL SAFETY FIELD INVESTIGATIONS
DCS6475
URGENT - DISTRIBUTE IMMEDIATELY
Date:
March 7, 2023
Subject: N212351211- Emission Recall
ECM OBD Faults Not Detected
Models: 2022 Chevrolet Silverado 2500/3500
2022 GMC Sierra 2500/3500
Equipped with Engine-Diesel, 8 CYL, 6.6L (RPO L5P)
To:
All General Motors Dealers
General Motors is releasing Emission Recall N212351211 today. The total
number of U.S. vehicles involved is approximately 11,146. Please see the
attached bulletin for details.
Global Warranty Management (GWM)
The Required Field Action section on the Investigate Vehicle History (IVH) screen will
be updated March 7, 2023. A list of vehicles in dealer inventory is attached to this
message.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS
Emission Recall
N212351211 ECM OBD Faults Not Detected
Release Date:
Attention:
March 2023
Revision:
00
All involved vehicles in the US and Canada 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
Chevrolet
GMC
Model
Silverado 2500/3500
Sierra 2500/3500
Model Year
From
To
RPO
Description
2022
L5P
Engine-Diesel, 8 CYL, 6.6L
2022
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
Correction
General Motors has decided to conduct a voluntary emissions recall involving certain 2022 model year
Chevrolet Silverado 2500/3500 and GMC Sierra 2500/3500 vehicles, equipped with a diesel engine. The
Engine Control Module (ECM) may not properly detect faults, set DTCs or illuminate the Malfunction
Indicator Light (Check Engine Light) if these fault conditions occur:
•Charge Air Cooler (CAC) low efficiency (DTC P026A)
•Exhaust Gas Recirculation (EGR) cooler low efficiency (DTC P2457)
•NOx sensor position 1 slow response (DTC P22F9)
Dealers are to reprogram the Engine Control Module (ECM) with corrected software.
Parts
No parts are required for this repair.
Warranty Information
Labor
Operation
9106534*
9106535*
9106536*
Important:
Description
Verified Module Software or Calibration Level: ECM is programmed
with same level of calibration – TCM was reprogrammed
Verified Module Software or Calibration Level: TCM is programmed
with same level of calibration – ECM was reprogrammed
Engine Control Module
Reprogramming with SPS
and
Transmission
Control
Labor
Time
0.4
Module
Trans.
Type
Net
Item
ZFAT
N/A
0.4
0.6
* To avoid warranty transaction rejections, carefully read and follow the instructions below:
6125814
• The Warranty Claim Code from the programming event 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
Copyright 2023 General Motors. All Rights Reserved.
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Emission Recall
N212351211 ECM OBD Faults Not Detected
“Warranty Claim Code” field of the transaction, otherwise the transaction will reject. It is best practice to enter
the FINAL code provided by SPS2.
Warranty Claim Code Information Retrieval
6125774
If the Warranty Claim Code was not recorded on the Job Card, the code can be retrieved in the SPS2 system as
follows:
1.
2.
3.
4.
Open TLC on the computer used to program the vehicle.
Select and start SPS2.
Select Settings (1).
Select the Warranty Claim Code tab (2).
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
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Emission Recall
N212351211 ECM OBD Faults Not Detected
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.
5743643
Important: If the vehicle VIN DOES NOT match, the message below will be shown.
5877000
5644477
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Emission Recall
N212351211 ECM OBD Faults Not Detected
Important: Techline Connect screens shown above.
Important: If the same calibration/software warning is noted on the TLC 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 Engine Control Module. Refer to K20 Engine Control Module: Programming and Setup in SI.
2.
Reprogram the Transmission Control Module. Refer to K71 Transmission Control Module: Programming and Setup
(10L1000 (MGM MGU)) in SI.
5644478
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.
3.
Record SPS Warranty Claim Code on job card for warranty transaction submission.
• If one of the two control modules to be programmed skips, the warranty claim code of the module that was
successfully updated should be used in the ‘Warranty Claim Code’ field of the warranty transaction.
4. CALIFORNIA, COLORADO, CONNECTICUT, DELAWARE, MAINE, MARYLAND, MASSACHUSETTS, NEW
JERSEY, NEW YORK, OREGON, RHODE ISLAND, VERMONT, WASHINGTON VEHICLES ONLY: Install a Recall
Identification Label upon recall completion. See General Motors Service Policies and Procedures Manual, Recall
Identification Label, for details.
5. CALIFORNIA VEHICLES ONLY: Complete a “Proof of Correction” certificate and provide to the vehicle owner upon
recall completion. For the recall number on the “Proof of Correction” certificate, enter only the six digits in characters 49 of this recall bulletin number: 235121.
Dealer Responsibility
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.
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Emission Recall
N212351211 ECM OBD Faults Not Detected
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.
***THE FOLLOWING 2 PARAGRAPHS ARE NOT FOR CANADA OR EXPORT***
When a California emissions recall is completed by a GM dealer, the dealer must provide the vehicle owner a “Proof of
Correction Certificate” which the owner may need to present to the California Department Of Motor Vehicles (DMV) when
renewing their vehicle registration. Without this correction certificate, the owner may be unable to renew their vehicle
registration.
Additional Certificates can be obtained, at no charge, from the 1Store application in GlobalConnect. Request GM Item
Number 1825 when ordering.
Dealer Reports – For USA & Export
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).
In order to ensure full protection under the emission warranty, and the right to participate in future recalls, the customer
notification letter recommends that customers have their vehicles serviced as soon as possible. It also advises that failure
to do so could legally be determined to be lack of proper maintenance. The vehicle may fail a state or local emission
inspection test if the recall work is not completed.
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.
In order to ensure full protection under the emission warranty, and the right to participate in future recalls, the customer
notification letter recommends that customers have their vehicles serviced as soon as possible. It also advises that failure
to do so could legally be determined to be lack of proper maintenance. The vehicle may fail a state or local emission
inspection test if the recall work is not completed.
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
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Emission Recall
N212351211 ECM OBD Faults Not Detected
March 2023
This notice applies to your vehicle, VIN: _____________________________________
Dear General Motors Customer:
This notice is sent to inform you that General Motors is conducting a voluntary emission recall that includes your
vehicle.
Reason For This Recall: Your 2022 model year Chevrolet Silverado 2500/3500 or GMC Sierra 2500/3500, with a 6.6L
diesel engine, may be equipped with an improperly functioning on-board emission-related diagnostic system that
violates California and Federal standards and regulations. The Engine Control Module (ECM) may not illuminate the
Malfunction Indicator Lamp (Check Engine Light) or set a diagnostic trouble code in the event of certain malfunctions of
the engine’s intake charge air cooler, exhaust gas recirculation (EGR) cooler or position 1 NOx sensor.
What Will Be Done: Your GM dealer will reprogram the Engine Control Module (ECM) with corrected software. This
service will be performed for you at no charge. Eligibility for this service will not be denied solely due to your 2022
model year Chevrolet Silverado 2500/3500 and GMC Sierra 2500/3500 having non-GM parts or repairs performed by
outlets other than a GM franchised dealer.
How Long Will The Repair Take? Because of service scheduling requirements, it is likely that your dealer will need
your vehicle longer than the actual service correction time of approximately 45 minutes.
What You Should Do: Please contact your GM dealer as soon as possible to arrange a service date. Instructions for
making this correction have been sent to your dealer. Please ask your dealer if you wish to know how much time will be
needed to schedule, process, and repair your vehicle.
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Emission Recall
N212351211 ECM OBD Faults Not Detected
If you have any questions or need any assistance, just contact your dealer or the appropriate Customer Assistance
Center at the number listed below.
For the hearing or speech impaired, please contact our Customer Assistance Center using the Telecommunication
Relay Service by dialing 711 then providing the appropriate Customer Assistance Center number for your vehicle.
Division
Chevrolet
GMC
Puerto Rico – English
Puerto Rico – Español
Virgin Islands
Number
1-800-222-1020
1-800-462-8782
1-866-467-9700
1-866-467-9700
1-866-467-9700
Text Telephones (TTY)
711 / 1-800-833-2438
711 / 1-800-833-2438
Emission Law Information: In order to ensure your full protection under the emission warranty made applicable to
your vehicle by state and federal law, and your right to participate in future recalls, it is recommended that you have
your vehicle serviced as soon as possible. Failure to do so could legally be determined to be lack of proper
maintenance of your vehicle. Also, your vehicle may fail a state or local emission inspection if this recall is not
accomplished.
IMPORTANT MESSAGE FOR CALIFORNIA RESIDENTS
The California Air Resources Board (CARB) requires vehicle emission recalls be completed prior to California
registration renewal. Uncorrected emission recalls will result in the inability to renew your California vehicle registration.
At the time of emission recall completion, your California dealer will issue a "Proof of Correction Certificate". Keep this
certificate and, if required, present it to the Department of Motor Vehicles when renewing your California registration as
proof of recall completion.
We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued
satisfaction with our products.
Regina A. Carto
Vice President
Global Product Safety and Systems
GM Recall: N212351211
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