NHTSA ID Number: 11016946
Manufacturer Communication Number: 23-NA-163
TSB/Document Date: 2025-04-10
Summary
This service bulletin provides repair information to correct a customer concern of No Crank, No Start, Quick Start/Stall, No FOB Detected, Key FOBs Inoperative, B3924 00, B3925 00, B3926 00, B3927 00, B3928 00 Set.
Bulletin No.: 23-NA-163
Service Bulletin
Date: March, 2025
TECHNICAL
Subject:
Brand:
No Crank, No Start, Quick Start/Stall, No FOB Detected, Key FOBs Inoperative,
B3924 00, B3925 00, B3926 00, B3927 00, B3928 00 Set
Model:
Model Year:
VIN:
from
to
Enclave
2018
2024
Envision
2019
2020
Encore GX
2020
2022
LaCrosse
2019
2019
Regal
2019
2020
CT6
2019
2023
XT4
2019
2023
XT5
2018
XT6
2020
Blazer
2019
2025
Camaro
2019
2024
Colorado
2019
2022
Cruze
2019
2019
Equinox
2018
2024
Malibu
2019
2025
Traverse
2018
2024
Trailblazer
2020
2025
Volt
2019
2019
Acadia
2019
2023
Canyon
2019
2022
Terrain
2018
2024
Engine:
from
to
—
—
—
—
2025
—
—
—
—
LFY
—
—
—
—
Involved Region or Country
North America. Middle East
Condition
Some customers may comment that the vehicle will not crank or will start but immediately
stall and/or the key FOBs are inoperative.
The BCM may have set DTC B389A 00, and it is current. (If there is no DTC B389A 00,
disconnect/reconnect battery for a minimum of 30 seconds and check again for DTC
B389A.) With DTC B389A 00 current, it will have three or more of the following
Environment ID DTCs (B3924 00, B3925 00, B3926 00, B3927 00) current in the BCM.
Cause
The cause of the condition may have presented immediately following a low voltage
condition, jump start, battery charging, battery replacement or battery disconnect and
reconnect. This can present a memory corruption event in the BCM.
Copyright 2025 General Motors
. All Rights Reserved.
Page 2
March, 2025
Bulletin No.: 23-NA-163
Important: Do not attempt the immobilizer procedure or module replacements before following this bulletin.
Resolve any current U-code DTCs by following standard troubleshooting procedures.
This procedure ONLY applies to the GEN3R BCM.
GEN3R BCMs can be identified by either the label on the module or looking up the
BMPN part number information in GDS2.
Correction
6482605
Follow the steps below to verify BMPN is a GEN3R through GDS2.
Verify you have a GEN3R BCM Base Model Part Number. Only GEN3R BCMS are eligible for this bulletin. Navigate
to GDS2 > Module Diagnostics > [K9] Body Control Module > Identification Information > Identification Information.
6482606
Bulletin No.: 23-NA-163
March, 2025
Page 3
6482607
6482608
Page 4
March, 2025
Bulletin No.: 23-NA-163
6482609
BMPNs eligible for this bulletin: 13518569, 13518570, 13518602, 13518603, 13519619, 13519620, 13519648,
13527252, 13527260, 13527261, 13527297, 13527298, 13527827, 13529492, 13529493, 13533809, 13533813,
13533814, 13533817, 13533821.
If the BCM is not a GEN3R, this bulletin does not apply. Continue with standard troubleshooting procedures in SI.
If the BCM is GEN3R, proceed.
Service Procedure
Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws
applicable to the activities it performs under this bulletin, including but not limited to handling, deploying,
preparing, classifying, packaging, marking, labeling, and shipping dangerous goods. In the event of a
conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you
must follow those applicable laws.
Important: If an immobilizer learn was previously done prior to this bulletin and the issue was not corrected,
proceed to step 4.
1. From SPS Supported Controllers, select K9 Body Control Module “Programming A Per Bulletin 23-NA-163 and
23-NA-165 Only.”
Bulletin No.: 23-NA-163
March, 2025
Page 5
6482610
2. Using the existing FOBs, from SPS Supported Controllers, select Immobilizer procedure “Body Control Module
IMMO Learn with Existing Transponder or Remote Key.”
6482611
3. Confirm vehicle cranks and starts and all FOB functions work properly on every FOB and that there are no
current DTCS. If there are no current DTCs and every FOB function works on all FOBs, stop here. If any DTCs
related to this bulletin are still current and vehicle will not start, proceed to step 4.
Important: Only proceed to these next steps if an immobilizer learn was previously done and the issue was
not corrected.
4. If an immobilizer learn was already performed, from SPS Supported Controllers, select K9 Body Control Module
“Programming B Per Bulletin 23-NA-163 Only”.
Page 6
March, 2025
Bulletin No.: 23-NA-163
6482612
5. Using the existing FOBs, from SPS Supported Controllers, select Immobilizer procedure “Engine Control
Module and Body Control Module IMMO Learn.”
6482613
6. Confirm vehicle cranks and starts and all FOB functions work properly on every FOB and that there are no
current DTCs.
Warranty Information
For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the following
labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information.
Labor
Operation
Description
Labor Time
2889808*
GEN3R Environment DTC
Special Data Reset
ST
*This is a unique Labor Operation for bulletin use only.
Bulletin No.: 23-NA-163
March, 2025
Page 7
Version
4
Modified
Released September 18, 2023
Revised November 15, 2023 – Updated steps and illustrations for Step 1 and Step 4
within Service Procedure.
Revised August 13, 2024 – Added Buick Enclave, Cadillac XT5 and XT6, Chevrolet
Blazer and Traverse and updated Model Years.
Revised March 13, 2025 – Updated Models, Model Years and changed the Labor Time
under Warranty Information.
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 equipment, tools, 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 GM dealer for information on whether your vehicle may benefit from the
information.
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TSB/Document ID: 23-NA-163
Replacement Service Bulletin Number:
MFR Communication Date: 2025-03-13
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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