21NA277

Bulletin No.:
Service Bulletin
Date:
21-NA-277
February, 2022
TECHNICAL
Subject:
No Crank, No Start, B3924 00, B3925 00, B3926 00, B3927 00 or P0513 Set
Brand:
Model:
Buick
Envision
Chevrolet
GMC
Model Year:
VIN:
from
to
2019
2020
Equinox
2018
2022
Malibu
2019
2022
Terrain
2018
2022
Copyright 2022 General Motors LLC. All Rights Reserved.
from
to
—
—
Engine:
Transmission:
All
All
Page 2
Involved Region or Country
February, 2022
Bulletin No.: 21-NA-277
United States, Canada
Note: This is NOT related to an ongoing BCM diagnostic. Unrelated to a no start of
vehicle security issue. This is a very specific issue and rare occurrence U code
communication diagnostics must be resolved first. Follow the bulletin detail as written.
Some customers may comment the vehicle will not crank or will start and immediately
stall.
Condition #1
5926221
This procedure ONLY applies to the Gen III® BCM! Reference (circled in red above)
designation on the module. Ensure the existence of this designation before attempting
this procedure!
One or more of the following conditions may be observed:
Multiple Environment IDs Present
• Three or more of the following Environment ID DTCs (B3924 00, B3925 00, B3926 00,
B3927 00) are present, and current in the BCM. The specific codes and the number of
codes present depends on the vehicle and vehicle content.
• Three or more of the following Environment ID DTCs (B3978 00, B3979 00, B3980 00,
B3981 00) are current in the BCM.
• 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.
If the above criteria is not met, this bulletin does not apply. Continue with normal SI
diagnosis.
Important: Do not attempt the immobilizer procedure or module replacements.
Condition #2
P0513 Present
Conditions Observed:
• The ECM has a current P0513 DTC.
• Fob Active and Passive entry working however no passive start via FOB in the backup
pocket.
Important: Do not attempt the immobilizer procedure or additional module
replacements.
Cause
The condition may have presented immediately following a low voltage condition, jump
start, battery charging, battery replacement or battery disconnect and reconnect.
Bulletin No.: 21-NA-277
February, 2022
Page 3
Resolve any current U-code DTCs by following standard troubleshooting procedures.
Important: DO NOT perform an immobilizer learn or replacement of the BCM, or other
modules.
To resolve any of these conditions, a special VCI may be needed.
U.S. DEALERS
1. Set up a TAC case in the Dealer Case Management System.
2. Attach a copy of the GDS2 DTC and ID Information report, showing all current and
history DTCs.
CANADA DEALERS
Correction
1. Obtain the GDS2 DTC and ID Information report and send to
[email protected]. (Please be sure to identify the report by placing the TSB #
21-NA-277 and the last eight digits of the VIN in the subject line of your e-mail.).
2. Contact TAC, and reference the e-mail above.
TAC / TCSC Process
TAC: Validate case meets bulletin criteria.
1. Confirm environment DTCs are present.
2. Confirm battery discharge event/no start.
3. TAC advises technician TCSC will take over the case to provide two part VCI and
support the technician through the VCI and programming process as needed.
4. TAC agent enters dealer information:
4.1. U.S.: TAC agent enters dealer information into Teams Chat to transfer case
to TCSC:
– Technician Name/phone/email
– TAC Case #
4.2. CANADA: TAC agent records validation of bulletin criteria in the TAC Service
Request (SR) and advises dealer to contact TCSC referencing TSB #
21-NA-277, their TAC SR number and request the two-part VCI.
TCSC: VCI Support
5. TCSC SPS Specialist creates DMS case using information provided in Teams Chat.
6. Creates two part VCI’s using the archive tool.
7. Contacts technician via outbound call with two part VCI and assists with
programming as needed (Procedure to be outlined in the bulletin).
8. DMS case closed.
TAC: Follow up
9. TAC has a follow-up flag set in the Seibel case to ensure follow up with technician to
confirm BCM issue is resolved and continue assisting with the repair as needed.
10. Seibel case closed.
Note: TAC and TCSC should share and cross reference cases in both call tracking
systems.
Instructions for installing re-green VCI (included in bulletin)
Note: Instruct technician to run part 1 and part 2 VCI.
Page 4
February, 2022
Bulletin No.: 21-NA-277
5926223
1. From SPS Supported Controllers, select ECM/programming/VCI.
2. Enter part 1 VCI and continue with programming procedure.
3. From supported controllers/ECM/programming/VCI = enter part 2 VCI and continue
with programming procedure.
Note: After completing the 2 VCI programming:
Bulletin No.: 21-NA-277
February, 2022
Page 5
5926224
4. From Supported Controllers, select K9 BCM programming.
Page 6
February, 2022
Bulletin No.: 21-NA-277
5926226
Important: Follow BCM programming instructions in Service Information. After
completing BCM programming, perform the Immobilizer procedure.
5. From supported controllers, perform Immobilizer procedure "Replacement BCM
with existing transmitter fobs."
Bulletin No.: 21-NA-277
February, 2022
Page 7
5926228
Note: *If dealer already performed the immobilizer procedure prior to reviewing this
bulletin, perform immobilizer procedure. “Replacement BCM with new transmitters.”
6. From supported controllers, perform BCM Setup.
Page 8
February, 2022
Bulletin No.: 21-NA-277
5926229
The BCM has now been restored.
Confirm vehicle cranks and starts.
Check for DTCs. There should be no current environment ID DTCs.
Parts Information
Labor
Operation
No parts are required for this repair.
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.
2888308*
Description
Labor Time
Diagnose Condition, Contact
TCSC, Reprogramming
BCM Through VCI Option
in SPS
1.5 hrs
*This is a unique Labor Operation for bulletin use only.
Version
3
Modified
Released December 07, 2021
January 03, 2022 – Updated the Subject and Condition #1.
February 16, 2022 – Corrected the B3924 00 DTC in the Subject and Condition #1 and
added Envision, Equinox, and Terrain Models.
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.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION