NHTSA ID Number: 10224307
Manufacturer Communication Number: PIT5832C
Summary
This Preliminary information communicates a diagnostic tip on how to resolve a issue if the serial data authentication configuration did not complete correctly.
Condition
Some technicians may experience one or more of the following concerns after replacing or reprogramming a module on one of the new Vehicle Intelligence
Platforms. or VIP Vehicles
- DTC: U1962 set current in ANY Module
- No Start
- Invalid Data codes with certain modules even through you can still review the data with GDS2
- Unable to perform a theft relearn or learn remotes back to the vehicle
- Unable to perform Module setup or learn
You may also notice that the VIN number will not self-populate in GDS2
Cause
The serial Data Authentication Configuration procedure runs automatically as part of the programming procedure.
The Serial Data Authentication Configuration is a security handshake between all the modules on the vehicle. One of the main indicators the Serial Data Authentication Configuration did not complete properly is DTC: U1962 is current in one or more modules.
Correction:
The dealer will need to perform the Serial Data Authentication Configuration (SDAC) following Instructions in SI using Document ID: 5404959. Be sure the vehicle is Power Moded to the OFF position before running the Serial Data Authentication Configuration procedure.
If a vehicle will not complete the Serial Data Authentication Configuration (SDAC) after updating or replacing a module, please perform the following:
1. If a module was replaced, make sure the new module was SPS programmed correctly or the SDAC will fail and not complete correctly.
2. If a module such as the BCM is replaced, and the immobilizer learn needs to be completed after replacement, the tech needs to make sure that the SDAC completes correctly, or a pop-up message like the one below will be displayed:
3. If a vehicle will not complete the SDAC, run the SDAC (using the Serial Data Authentication selection in Techline Connect) again. Select the box in SPS controller list in the lower right-hand corner labeled “Serial Data Authentication Configuration”.
4. The SDAC will run 3 times before it fails. When it fails, there should be a pop box that shows up on the screen like the one below. Check and record the items listed under System and ECU. If the system box reads “Server” then the issue is related to the SPS system server or internet connection and not related to the vehicle. Attempt the SDAC again at a later time.
5. If the system box reads “ECU”, then the Global ID of the module that is causing the concern should be able to be obtained. In the example below, the Global ID is listed as K36, which is for the SDM. The module’s name can be found by looking at the global codes listed under “Control Module References” document in SI for the vehicle that is being working on.
6. Sometimes the pop-up box will read “ECU” but it will not give you a Module ID in the ECU box. In this case, the servicing dealer will have to contact Techline support and they will have to assist by getting a SPS log file from the dealership’s system. If this is the case, they must be contacted right after the SDAC failure. If any other programming is attempted before contacting Techline, then the SPS log will be erased.
7. Once the module that caused the concern has been identified, pull the fuse that supplies battery power to that module. Sometimes the fuse is a three-prong fuse that feeds other modules. In this case, the servicing technician will need to find a two-prong fuse to power the other module that was not involved in the SDAC failure.
8. If the SDAC completes after removing battery power from the module in question, that module will need to be replaced. Afterwards, verify that the SDAC completes after SPS programming of the new module.
27 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
BUICK | ENVISION | 2021-2022 |
| CADILLAC | CT4 | 2020-2022 |
| CADILLAC | CT5 | 2020-2022 |
| CADILLAC | ESCALADE ESV | 2021-2023 |
| CHEVROLET | CORVETTE | 2020-2023 |
| CHEVROLET | SILVERADO 1500 | 2022 |
| CHEVROLET | SUBURBAN | 2021-2023 |
| CHEVROLET | TAHOE | 2021-2023 |
| GMC | HUMMER EV | 2022 |
| GMC | SIERRA 1500 | 2022 |
| GMC | YUKON | 2023 |
| GMC | YUKON XL | 2021-2022 |
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5832C
Published date: 09/30/2022
MC-10224307-9999.pdf 449.075KB
NHTSA ID Number: 10193434
Manufacturer Communication Number: PIT5832
Summary
This Preliminary information communicates a diagnostic tip on how to resolve a issue if the serial data authentication configuration did not complete correctly.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5832
Published date: 04/6/2021
MC-10193434-9999.pdf 229.237KB
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.
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- 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
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- 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
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- 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
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Last update on 2026-06-07 / Affiliate links / Images from Amazon Product Advertising API
SEOCONTENT-START
Bulletin No.: PIT5832C Published date: 09/30/2022
Preliminary Information PIT5832C Diagnostic Tip: No Start Or Unable To Perform Theft Relearn After Replacing Or Programming A Module / DTC U1962
Models Brand: Buick Cadillac Cadillac Cadillac Chevrolet Envision CT4
CT5
Escalade Models Corvette Model: Model Years: 2021 – 2023
2020 – 2023
2020 – 2023
2021 – 2023
2020 – 2023 VIN:
from to
All All
All All
All All
All All
All All Engine: All All All All All Transmissions: All All All All All Chevrolet Chevrolet Chevrolet GMC GMC GMC Silverado 1500 New (RPO J22, VIN Digit 12 = A or D) Suburban
Tahoe
Yukon Models HUMMER EV
Sierra 1500 New (RPO J22, VIN Digit 12 = A or D) 2022
2021 – 2023
2021 – 2023
2021 – 2023
2022
2022 All All All All All All All All All All All All All All All All All All All All All All All All Involved Region or Country North America
Condition
Some technicians may experience one or more of the following concerns after replacing or reprogramming a module on one of the new Vehicle Intelligence Platforms. or VIP Vehicles
1. DTC: U1962 set current in ANY Module
2. No Start
3. Invalid Data codes with certain modules even through you can still review the data with GDS2
4. Unable to perform a theft relearn or learn remotes back to the vehicle
5. Unable to perform Module setup or learn
6. You may also notice that the VIN number will not self-populate in GDS2
Cause
The serial Data Authentication Configuration procedure runs automatically as part of the programming procedure.
The Serial Data Authentication Configuration is a security handshake between all the modules on the vehicle. One of the main indicators the Serial Data Authentication Configuration did not complete properly is DTC: U1962 is current in one or more modules.
See Example below: Correction:
The dealer will need to perform the Serial Data Authentication Configuration (SDAC) following Instructions in SI using Document ID: 5404959. Be sure the vehicle is Power Moded to the OFF position before running the Serial Data Authentication Configuration procedure.
If a vehicle will not complete the Serial Data Authentication Configuration (SDAC) after updating or replacing a module, please perform the following:
1. If a module was replaced, make sure the new module was SPS programmed correctly or the SDAC will fail and not complete correctly. 2. If a module such as the BCM is replaced, and the immobilizer learn needs to be completed after replacement, the tech needs to make sure that the SDAC completes correctly, or a pop-up message like the one below will be displayed: 3. If a vehicle will not complete the SDAC, run the SDAC (using the Serial Data Authentication selection in Techline Connect) again. Select the box in SPS controller list in the lower right-hand corner labeled “Serial Data Authentication Configuration”. 4. The SDAC will run 3 times before it fails. When it fails, there should be a pop box that shows up on the screen like the one below. Check and record the items listed under System and ECU. If the system box reads “Server” then the issue is related to the SPS system server or internet connection and not related to the vehicle. Attempt the SDAC again at a later time. 5. If the system box reads “ECU”, then the Global ID of the module that is causing the concern should be able to be obtained. In the example below, the Global ID is listed as K36, which is for the SDM. The module’s name can be found by looking at the global codes listed under “Control Module References” document in SI for the vehicle that is being working on. 6. Sometimes the pop-up box will read “ECU” but it will not give you a Module ID in the ECU box. In this case, the servicing dealer will have to contact Techline support and they will have to assist by getting a SPS log file from the dealership’s system. If this is the case, they must be contacted right after the SDAC failure. If any other programming is attempted before contacting Techline, then the SPS log will be erased. 7. Once the module that caused the concern has been identified, pull the fuse that supplies battery power to that module. Sometimes the fuse is a three-prong fuse that feeds other modules. In this case, the servicing technician will need to find a two-prong fuse to power the other module that was not involved in the SDAC failure. 8. If the SDAC completes after removing battery power from the module in question, that module will need to be replaced. Afterwards, verify that the SDAC completes after SPS programming of the new module.
Version History
Version 4
04/06/2021 – Created on
01/26/2022 – Update to add models and model years and to add to diagnosis. Modified 08/29/2022- Update to add Truck models with VIP communications 09/29/2022- UPdate PI to fix model descriptions for Pick up models
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SEOCONTENT-END
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