23-NA-172

Bulletin No.:
Service Bulletin
Date:
23-NA-172
September, 2023
TECHNICAL
Subject:
Brand:
Cadillac
Chevrolet
Holden
Manual Transmission Pops/Jumps Out of Third Gear After Shifting and During
Acceleration
Model:
Model Year:
VIN:
to
Transmission:
(Manual)
to
CT4
2022
2024
CT5
2024
2024
MJl
2010
2011
M10
2016
2024
2017
2020
2018
2024
MH3
Corvette
2006
2013
MZ6, MM6
Commodore
2014
2017
MER
Camaro
from
Engine:
from
MG9
—
—
—
MM6
MJK
Involved Region or Country
North America, Chile, Colombia, Ecuador, Paraguay, Europe, Russia, Middle East,
Japan, Thailand. Australia/New Zealand
Condition
Some customers may comment that the transmission pops or jumps out of third gear after
shifting and during acceleration.
Cause
This condition may be caused by a manufacturing defect in internal components.
Correction
6430406
Replace specific transmission assemblies identified by the TUN label (1) and date code
(2) outlined in the Parts Information.
Copyright 2023 General Motors LLC. All Rights Reserved.
Page 2
September, 2023
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.
Bulletin No.: 23-NA-172
Parts Information
Service Procedure
Replace the transmission. Refer to Manual
Transmission for Tremec 6-Speed Replacement in SI.
6430439
Inspect the Data Matrix Label for the TUET number.
6430412
1. Transmission Part Number
2. Date of Production
– Example of date code decipher
• Month: C - March
• Year: D - 2023
• Day (Two Digits): 07
• Last Digit: Production shift
3. Customer Part Number
4. Serial Number
Bulletin No.: 23-NA-172
September, 2023
Page 3
Inspect any replacement transmissions for the specific
date codes (2) located in the parts list below prior to
installing the unit in a vehicle. If these transmissions
are found in your parts inventory, please return for
credit.
Important: If you find that your complaint matches the
bulletin, but your transmission identification does not
match, please contact technical assistance for
verification on repair direction.
Note: Transmissions with the specific part number and
build dates listed below should be replaced with a new
unit, rather than attempting a repair.
Causal Part
Description
Part Number
Qty
X
2022-2024 Cadillac CT4 with
RPO (MG9)
24045453
TUET18148
Built between December 19,
2022 to January 9, 2023
1
X
2024 Cadillac CT5 with RPO (MJK)
24044484
TUET18091
Built between December 15,
2022 to January 4, 2023
1
X
2011 Camaro with RPO (M10)
92246731
TUET10860
Built on December 20, 2022
1
X
2016-2024 Camaro with RPO (MM6)
24298784
TUET17530
Built between December 21,
2022 to January 9, 2023
1
X
2020-2024 Camaro with RPO (MM6)
24298783
TUET17529
Built on January 9, 2023
1
2017-2020 Camaro with RPO (MJK)
24298781
TUET17527
Built between December 19,
2022 to January 10, 2023
1
2018-2024 Camaro with RPO (MH3)
24298780
TUET1726
Built between December 15,
2022 to December 21, 2022
1
X
2006-2009 Corvette with RPO (MZ6)
24252997
TUET10315
Built on December 20, 2022
or December 22, 2022
1
X
2010-2013 Corvette with RPO (MZ6)
24264050
TUET12009
Built on December 22, 2022
1
X
2006-2013 Corvette with RPO (MM6)
24264056
TUET12010
Built on December 22, 2022
1
X
2014-2017 Commodore with RPO (MER)
19418486
TUET17510
Built on December 22, 2022
1
X
X
Page 4
September, 2023
Bulletin No.: 23-NA-172
Warranty Information
For vehicles repaired under the Powertrain coverage,
use the following labor operation. Reference the
Applicable Warranties section of Investigate Vehicle
History (IVH) for coverage information.
Labor Operation
Description
Vehicle
8486348*
Manual Transmission
Inspection
All
Labor Time
0.4 hr
Add
2010–2011 Camaro
3.7 hrs
Add
2016–2024 Camaro
7.0 hrs
Add
2006-2009 Corvette
Base: 7.6 hrs
Engine Code E: 7.9 hrs
Engine Code T: 11.1 hrs
Add
2010-2013 Corvette
Engine Code E: 7.9 hrs
Engine Code T: 11.1 hrs
Engine Code W: 7.6 hrs
Add
2014-2017 Commodore
4.1 hrs
3.0 (V6) hr
3.3 (V8) hr
Transmission Replacement
*This is a unique Labor Operation for bulletin use only.
Version
1
Modified
Released September 22, 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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