23-NA-163

Bulletin No.:
Service Bulletin
Date:
23-NA-163
September, 2023
TECHNICAL
Subject:
No Crank, No Start, Quick Start/Stall, No FOB Detected, Key FOBs Inoperative, B3924
00, B3925 00, B3926 00, B3927 00, B3928 00 Set
Brand:
Model:
Buick
Envision
Chevrolet
GMC
Model Year:
from
to
2019
2020
Equinox
2018
Malibu
2019
Acadia
2019
Terrain
2018
Involved Region or Country
VIN:
from
to
Engine:
Transmission:
2023
2023
North America
Additional Options (RPOs)
Condition
Cause
Correction
Copyright 2023 General Motors LLC. All Rights Reserved.
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.
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.
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.
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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.
6430402
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6430398
6430399
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Bulletin No.: 23-NA-163
6430394
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 “Special Data Reset A.”
Bulletin No.: 23-NA-163
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6430404
2. Using the existing FOBs, from SPS Supported
Controllers, select Immobilizer procedure “Body
Control Module IMMO Learn with Existing
Transponder or Remote Key.”
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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 “Special Data Reset B.”
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6430403
5. Using the existing FOBs, from SPS Supported
Controllers, select Immobilizer procedure “Engine
Control Module and Body Control Module IMMO
Learn.”
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Bulletin No.: 23-NA-163
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6. Confirm vehicle cranks and starts and all FOB
functions work properly on every FOB and that
there are no current DTCS.
Bulletin No.: 23-NA-163
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Page 11
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
0.5 hr
*This is a unique Labor Operation for Bulletin use only.
Version
1
Modified
Released September 18, 2023
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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