N212355140-01

GLOBAL SAFETY FIELD INVESTIGATIONS
DCS6453
URGENT - DISTRIBUTE IMMEDIATELY
Date:
February 17, 2023
Subject: REVISION: N212355140-01 – Service Update
Diesel Engine Control Module Diagnostics
Updated Warranty Period, Title, and Condition Statement
Models: 2021-2022 Cadillac Escalade, Escalade ESV
2021-2022 Chevrolet Suburban
2021-2022 Chevrolet Tahoe
2021-2022 GMC Yukon, Yukon XL
Equipped with 6-cylinder, 3.0L Diesel engine (RPO LM2)
To:
All General Motors Dealers
This bulletin has been revised to update the warranty period, the title of the
bulletin, and the condition statement. Please discard all previous copies of
bulletin N212355140.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS
Service Update
N212355140 Diesel Engine Control Module Diagnostics
Release Date:
February 2023
Revision:
01
Revision
Description:
This bulletin has been revised to update the warranty period, the title of the bulletin, and the condition
statement. Please discard all previous copies of bulletin N212355140.
Attention:
This service update includes vehicles in dealer inventory and customer vehicles that return to the
dealership for any reason. This bulletin will expire at the end of the involved vehicle’s Emission Select
Component Limited Warranty period.
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
Cadillac
Chevrolet
Chevrolet
GMC
Model
Escalade, Escalade ESV
Suburban
Tahoe
Yukon, Yukon XL
Model Year
From
To
RPO
2021
LM2
2022
Description
6-cylinder, 3.0L Diesel engine
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
Certain 2021 and 2022 model year Cadillac Escalade, Escalade ESV, Chevrolet Suburban, Chevrolet
Tahoe and GMC Yukon, Yukon XL vehicles, equipped with the 6-cylinder, 3.0L diesel engine (RPO LM2),
may have a condition where the engine control module calibrations can be enhanced to improve the
accuracy of certain diagnostic tests.
Dealers are to reprogram the engine control module.
Parts
No parts are required for this repair.
Warranty Information
Labor
Operation
9106513*
9106514*
Important:
Description
Verified Module Software or Calibration Level: Module Is
Programmed with Same Level Software or Calibration
Engine Control Module Reprogramming with SPS
Labor
Time
0.2
Trans.
Type
Net
Item
ZFAT
N/A
0.4
* 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.
Copyright 2023 General Motors. All Rights Reserved.
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Service Update
N212355140 Diesel Engine Control Module Diagnostics
•
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 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
Caution: Before downloading the update files, be sure the computer is connected to the internet through a network cable
(hardwired). DO NOT DOWNLOAD or install the files wirelessly. If there is an interruption during programming,
programming failure or control module damage may occur.
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.
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Service Update
N212355140 Diesel Engine Control Module Diagnostics
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.
5743643
Important: If the vehicle VIN DOES NOT match, the message below will be shown.
5877000
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Service Update
N212355140 Diesel Engine Control Module Diagnostics
5644477
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.
5644478
Note: The screenshot above is 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
Whenever a vehicle subject to this service update enters your vehicle inventory, or is in your facility for service in the
future, and the vehicle is still covered under the Emission Limited Warranty, you must take the steps necessary to be sure
the service update correction has been made before selling or releasing the vehicle.
All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers' possession
and subject to this bulletin 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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Service Update
N212355140 Diesel Engine Control Module Diagnostics
Dealer Reports – For USA & Export
The Inventory tab of the Open Vehicle Report will contain Service Update Bulletin VINs that apply to this field action.
This information is intended to assist dealers with the PROMPT COMPLETION of these vehicles. The Customer InService tab will not contain Service Update Bulletin VIN data because the intent of a Service Update Bulletin is to not
inconvenience a customer with a special trip for service. Service Update Bulletins are to be completed when the
customer is in for a regularly scheduled visit.
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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