NHTSA ID Number: 11017799

Manufacturer Communication Number: N242487960-01

TSB/Document Date: 2025-05-05

Summary

Certain vehicles listed above may have a condition in which the Body Control Module (BCM) may not properly clear the DTC U1962 (Unable to Authenticate Serial Data Message). Dealers are to reprogram the body control module.

If the PDF is very large, it may not load in the preview below.

Loading...

Taking too long?

Reload document

| Open in new tab

Download [452.97 KB]

If the (TSB) Technical Service Bulletin/Document PDF does not show in the preview, download or view it on the NHTSA Website

Click on the (+) Plus Sign

Then Click on Associated Document(s)

View or Download (TSB) Technical Service Bulletin PDF

Search NHTSA Database for Recalls

View Latest Recalls

Search NHTSA Database for Vehicle Investigations

View Latest Vehicle Investigations

Search NHTSA Database for Vehicle Complaints

View Latest Vehicle Complaints

TSB/Document ID: N242487960-01
- Identifier the manufacturer uses to identify the communication and the way it can be located by those searching for it.

Replacement Service Bulletin Number:
- Replacement service bulletin number.

MFR Communication Date: 2025-05-05
- Date the communication was disseminated by the manufacturer.

MFR Internal Campaign ID/Software Version: N242487960-01
- Manufacturer's unique identifier for the service campaign if this communication is a related one.

Communication Type: Service Campaign

- Service Bulletin / Repair Instructions
- Service Campaign
- Warranty Program / Extension
- Over The Air
- Emissions
- Other

NHTSA Components: UNKNOWN OR OTHER
- NHTSA Component(s) of the products involved in communications.

MFR Component System:
- Manufacturer's top-level component of the products involved in communications.

MFR Component Subsystem:
- Manufacturer's component subsystem of the top-level component identified above.

GENERAL MOTORS
DCS7209
URGENT - DISTRIBUTE IMMEDIATELY

Date:

May 5, 2025

Subject: REVISION: N242487960-01 – Service Update
BCM DTC U1962 May Not Properly Clear
2024 Model Year Added
Models: 2024-2025 Chevrolet Corvette

This bulletin is being revised to add the 2024 model year. Please discard all
previous copies of bulletin N242487960.
The Stock VIN list of vehicles in dealer inventory is attached to this message.
Note: this list is only accurate at the time of report creation and all VINs should
be validated in IVH prior to repair.

END OF MESSAGE

Service Update
N242487960 BCM DTC U1962 May Not Properly Clear
Release Date:
Revision Description:
Attention:

May 2025

Revision:

01

This bulletin is being revised to add the 2024 model year. Please discard all previous
copies of bulletin N242487960.

This service update includes vehicles in dealer inventory and customer vehicles that return to the
dealership for any reason. This bulletin will expire February 29, 2040.
Model Year

Make
Chevrolet

Model
Corvette

From
2024

To
2025

Investigate Vehicle History (IVH) in the GM Global Warranty Management system should always be checked to confirm
vehicle involvement prior to beginning any required inspections and/or repairs.
Condition
Correction

Certain vehicles listed above may have a condition in which the Body Control Module (BCM) may not
properly clear the DTC U1962 (Unable to Authenticate Serial Data Message).
Dealers are to reprogram the body control module.

Parts
No parts are required for this repair.
Warranty Information
Labor
Operation
9107555*
9107556*
Important:

Description
Verified Module Software or Calibration Level: Module Is
Programmed with Same Level Software or Calibration
Body Control Module Reprogramming with SPS

Labor
Time
0.2

Trans.
Type

Net
Item

ZFAT

N/A

0.5

* 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
“Warranty Claim Code” field of the transaction, otherwise the transaction will reject. It is best practice to enter
the FINAL code provided by SPS2.

Page 1 of 4

Service Update
N242487960 BCM DTC U1962 May Not Properly Clear
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.

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.

Page 2 of 4

Service Update
N242487960 BCM DTC U1962 May Not Properly Clear
•

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 primary module (for VIP ICE 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.

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

Important: Techline Connect screens shown above.

Page 3 of 4

Service Update
N242487960 BCM DTC U1962 May Not Properly Clear
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 Body Control Module. Refer to K9 Body 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 through
February 29, 2040, 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 Pre-Owned (CPO), courtesy transportation vehicles, dealer shuttle vehicles, CarBravo, etc.
in dealers' possession and subject to this field action 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 Pre-Owned (CPO) vehicles currently in the dealers’ inventory within the SHIFT Digital system 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 SHIFT Digital system, or once again be used in the Courtesy Transportation Program.
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

Page 4 of 4

Bestseller No. 1

iCarsoft CR Pro+ 2025 All System Diagnostic Bidirectional Scan Tool for Cars, Full OBD2 Scanner with CAN FD, 49 Reset Services-Oil/ETC/EPB/BMS/SAS/SRS/TPMS/BSC/DWR/INJ/BLD/SPS etc.Free Update

• 【WHY CHOOSE THE 2025 CR PRO+? 】THE MOST COST-EFFECTIVE BIDIRECTIONAL OBD2 SCANNER, COSTING 80 LESS THAN CR MAX, WITH THE SAME 49+46 BRAND-SPECIFIC MAINTENANCE SERVICES & ECU CODING ABILITY AS CR MAX, CR Pro+ performs more in-depth services and active test than other brands. Unlike others only do basic oil/SAS reset, and wiper/lamp test, CR Pro+ of 2.0GHz quad-core CPU dives more deeper to test for complex hardware response, actuator condition, ECU functionality, and performs more targeted maintenance services with more professional hardware, sensors and control unit services. NOTE-The ECU Coding functions ONLY work for AU DI/BM W/ V W.
• 【POWERFUL BI-DIRECTIONAL CONTROLS】iCarsoft Pro+ (2025) enables to test more detailed and complex units than other-brand scanners, for example, for Porsche 911 stepless electronic fan module- letting you diagnose cooling system issues before they cause overheating damage, continuous oxygen sensing - LSU, and attaching brake pads, and more. Wiith this tool you can efficiently identify the fault source, avoid unit waste due to "blind unit- guessing" repairs. NOTE:The supported actuation test functions vary by vehicle models, please contact us to check compatibility.
• 【COST-EFFECTIVE 49 RESET SERVICE】 The iCarsoft Pro+ 2025 features full Reset/ Adaptation/ Calibration/ Initialization/ Relearn/ Match service with Full ECU diagnostic, including ABS Reset/ Oil Reset/ EPB Reset/ ETC Reset/ INJ Reset/ SAS Reset/ BLD Reset/ BMS Reset/ LAP Reset/ SPS Reset/ TPMS Reset/ACS Reset/ AFS Reset/ FPP Reset/ IDL Reset/ BSC Reset/ Door Reset/ Seat Reset/ TCM Reset/ Service Interval Reset/ Brake Reset/ DWR Reset/ ECM Reset etc, and other special functions based on car brands. NOTE:The supported reset functions vary by vehicle models, please contact us to check compatibility.
• 【OE Multi-SYSTEMS DIAGNOSTICS】Unlike other scanner's limited systems diagnostic, CR Pro+ digs deeper across much more systems and sub-systems,like Engine, TCM, ABS, Airbag, Brake, BMS, Battery, electronics, windows, etc, helping you detect existing faults and potential faults. CR Pro+ powerfully decode multi systems, giving you complete vehicle health analysis - not just isolated systems. It displays module Info, real-time data graphs, such as transmission temperature, saves freeze frames to pinpoint intermittent faults. Note: Available systems vary by model. TIP:Each car model has unique systems. Please contact us to confirm which systems are available for your vehicle.
• 【Advanced 49 Reset + 38 Brand-Specific Services】 CR Pro+ covers 49+ system resets and has brand - specific reset functions. As mileage grows, more units require maintenance. Our reset tool suit both individual car owners and mechanics. Post - emergency repairs, our tool enables quick resets, restoring vehicle condition and saving dealership reset costs.For repair shops, cut outsourcing, earn more per order, reset in 2 minutes. NOTE:The supported reset functions vary by vehicle models, please contact us to check compatibility.

$299.99

Buy on Amazon Price incl. tax, excl. shipping

Bestseller No. 2

iCarsoft Auto Diagnostic Scanner POR V2.0

• Scanner POR V2.0 with all obd2 services
• Do the scanning for engine
• Support OBDII/EOBD Ten Modes of Operation

$128.55

Buy on Amazon Price incl. tax, excl. shipping

SaleBestseller No. 3

Bidirectional Diagnostic Tool for Mercedes-Benz/Sprinter/Smart, iCarsoft MB V3.0 (2025 Version) 35+ Reset Service OBD2 Full System Scanner, Battery Test/Actuation Test, Auto VIN, Quick Scan

• 【Designed for Mercedes-Benz, Sprinter and Smart】Integrating all functions of iCarsoft MB series automotive diagnostic tool, accesses car specific subsystem. (As every car model of Benz has its-owned specific car system and ECUs, not all car models have full car ECUs which may cause scanner to be unable to do all reset services listed. So please email to us with car VIN and Services Required to do scanner's services for a compatibility check before purchasing. You can also refer to the eighth image in the main picture for compatibility instructions and available functions for your model.)
• 【35+ Reset Services】MB V3.0 (2025 Version) diagnostic tool performs professional maintenance services - OIL / SAS/ EPB / ETC /D-P-F / TPMS / ABS / Suspension / Air Conditioner / Head Lamp / Body Stability / Engine Contro / Seat / Fuel Pump / Air-Filter / Engine Idle / Door / ImmoKey Reset, Injector Coding, Trans Adpation, Miscellaneous + 14 newest maintenance services - Adblue, Cluth, Electronic Water Pump, NOxSensor Test, Rain/Light Sensor, Start/Stop, Radar/Camera, Cylinder Cutout Test, Remove Speed Limit, Reset Control Unit, Oxygen Sensor, Seat Belt, Crankshaft Learning, Language Setting and more (Tips: Quantity of reset-services is based on the car system ECUs your car model has)
• 【OE-Level All System OBD2 Scanner】iCarsoft MB V3.0 (2025 Version) diagnostic scanner offers comprehensive OBDII services, allowing you to quickly scan all systems, including the Engine, ABS, SAS, SRS, TPMS, TCM, Fuel Pump System, ESP, EPB, EPS, Suspension, SCM, Adaptive Systems, and more. It supports functions such as reading and erasing codes, checking I/M readiness, viewing freeze frame data, performing O2 sensor tests, conducting on-board monitoring, testing the evap system, auto VIN retrieval, and reading both generic and specific codes, as well as DTCs and battery tests.
• 【Bidirectional Scan Tool】iCarsoft MB V3.0 (2025 Version) Bidirectional scanner supports activate or control a vehicle system or component, allows commanding cars’ modules and receiving info from the ECU to perform active tests on individual components, including EVAP/ABS Motor Pump/Windows/Sunroof and more, to pinpoint fault causes & resolve issues,and allows you to re-learn certain components after making repairs or replacement.
• 【Real Time Record & Graph View】iCarsoft MB V3.0 (2025 Version) can automatically record vehicle text history and identify vehicle information. Preserve real-time data information. View & Graph Live Data. Support Data Review and Print. Multi-language: English, German, Dutch, Spanish, French and so on.

$219.00 −$29.05 $189.95

Buy on Amazon Price incl. tax, excl. shipping

Bestseller No. 4

iCarsoft Bidirectional Scan Tool, CR Max OBD2 Diagnostic Scanner for All Vehicles, Full System 50 Resets+46 Extra Services, 400000+Active Tests,ECU Coding, Battery Registration, Oil Reset/ABS,CAN FD

• WHY CHOOSE THE 2025 CR MAX -Upgrade the latest diagnostic capabilities for all vehicles after 1996: upgrad to 50+maintenance services; 46 extra specific functions; real all systems/all control modules diangose; over 40K+ bidirectional actuation tests for diagnosing all control moduels of cars; Powerful full OBD2 Functions; built-in ECU Coding for BMW/ Audi/ VW/ RollsRoyce; Battery retistration for new battery adaptation and more. It covers all vehicle diagnostic services and some special professional vehicle maintenance servces, assists you to do home DIY vehicle maintenance or car repair as a pro technician.
• NEWEST IN INNOVATION FULL OBD2 SERVICES- iCarsoft auto car diagnostic scanner compatible with CAN-FD, CR MAX can do it all-reads and clears trouble codes, ALL SYSTEM DIAGNOSIS such as engine, transmission, ABS and airbag etc. CR MAX code reader for all cars can perform I/M Readiness, Live Data, Freeze Frame, Vehicle Information, Monitor Test, On-Board Monitor, Evap System Test,O2 Sensor Test,DTC Library Lookup,etc. (Warm Tips: If you car is after 2023,please contact us for compatibility; 3. It comes with 16PIN OBD2 diagnostic adapter, please check your car diagnostic socket if it is 16pin socket, if your car is 14pin diagnostic socket please contact us for the solution.)
• 49 RESET+ 46 SERVICES- Performs: Oil Reset, EPB,SAS,Throttle, D-P-F, Battery, ABS, Injector, TPMS, Suspension, AC, Head Lamp, Body Stablity, Engine, Tramsmission, Airbag, Seat, Door-Win-Roof, Odometer, Fuel Pump, Door, Immobilizer, E-G-R.+21 NEWEST SERVICES( Need update scanner)-AdBlue, Clutch, Crankshaft, High Voltage Battery, Cruise Control, NO xSensor, Rain Sensor, Stop And Start, Turbocharger, Head Up Display, Radar Camera, Vehicle Setup, Cyliner Misfire Check,SpeedLimitAssist, ControlUnitReset,OxygenSensor, Seatbelt. Extra 46+ extra services based on car brand.(Tips: Quantity of reset/ calibration fucitons are based on car system that your vehicle model has)
• REVOLUTIONARY 400000+BIDIRECTIONAL ACTIVE TESTS: Upgraded CR Max scanner equip with numberous of actuational test items for covering all available vehicle control modules, no longer only do simple light test or window test like other scanners, performs hardware modules test and software control modules test for checking car units or new updated control moduels work well or not after maintenance/ repair/ re-installation/ control system updated (Example for Benz- Roller Sun Blind test; Backup Camera test ;Self-test; EPB test; Transport Mode test;Boost Pressure Positioner test; Fuel Pump test; AND MORE!!).(Warm tip: The available test items are based on control modules your car has)
• ECU CODING+ BATTERY REGISTRATION- Powerful ECU Coding service for BMW/MINI/RollsRoyce / Audi/VW/Seat/Skoda/Bentley/Bugatti/Lamborghini, Improves Engine Power Performance and Optimizes Fuel Efficiency and Match New Hardware Unit to car and Customized a comfortable Driving Modes and Fixes & Updates Original Software Bug. The battery test function for checking car battery health, perform battery reset (BMS ) for replacing a damaged or aging car battery with a new one and register new battery to car ECU

$459.99

Buy on Amazon Price incl. tax, excl. shipping

Bestseller No. 5

OBD2 Scanner Diagnostic Tool for Porsche/Cayenne, iCarsoft POR V2.0 Code Reader for Porsche, All System in-Depth Scan, with Oil Reset/SAS/EPB/BMS/ETC/DP/BLD/INJ, Battery Test

• 【Enhance Diagnostic 】iCarsoft POR V2.0 code reader is enhanced its ability which is different from other scanner, such as enhancing full system diagnostic function, enhancing in-depth diagnosis ability to all faults and potential faults, more powerful scaning to all components,providing free update&free repair&24 hour tech support. You can experience easier, smoother & faster operation. Also give your cars satisfying routine maintenance to avoid costly repairs. NOTE: The diagnosable systems depend on the ECU you have on your car. Please contact us to check compatibility before purchase.
• 【OBD2 Full Function】iCarsoft POR V2.0 scan tool will allow you to perform full OBDII diagnostic for Porsche/Cayenne with OBDII / EOBD protocols.Effortlessly does obd2 detection: read/erase codes, I/M Readiness,Freeze Frame, O2 Sensor Test, On-Board Monitoring,Evap System Test, Read Vehicle Info, Retrieve generic & manufacturer specific codes, MIL,Read live PCM DataStream,Read DTCs, DTCs search etc. Tips: the fault code can be only erased after the problem is fixed
• 【Most Useful Reset Services】iCarsoft POR V2.0 car diagnostic tool offers essential features like Oil Reset, EPB/ SAS/BMS/BLD(ABS Bleeding Service)/ETC /DP Reset/ Injector Coding etc. Easily reset oil change indicators, recalibrate steering angle sensors,relearn replaced parking brake and so on. For optimal vehicle performance and maintenance convenience.
• 【Full Systems In-depth Diagnosis】It has powerful code-reading ability for Porsche-specific codes, and it is engineered for EU/US models. Specializes in in-depth diagnosis for Porsche models, comprehensively scanning all ECUs from engine, ABS, transmission to AC, windows, etc. Whether it's a complex engine misfire, an ABS system glitch during high - speed braking, a transmission issue causing gear - shifting problems, or an AC unit not cooling properly on a hot day, it delves deep.
• 【Fast Diagnostics, Live Data】Full vehicle information option-vehicle identification number (VIN) / calibration verification number (CVN) / other test information. iCarsoft POR V2.0 can instantly obtain crucial vehicle details for expedited diagnostic processes, and keep data stream recording for later review/ DTC Lookup/ diagnostic data record/ custom report & display live data stream in color graphing

$169.99

Buy on Amazon Price incl. tax, excl. shipping

This product presentation was made with AAWP plugin.

Last update on 2025-05-10 / Affiliate links / Images from Amazon Product Advertising API