NHTSA ID Number: 10238342
Manufacturer Communication Number: N232403290
TSB/Document Date: 2023-06-30
Summary
Service Update - Certain vehicles may have a condition in which the incorrect thrust washer was installed in the transmission input carrier
. Dealers are to replace the transmission.
GLOBAL SAFETY FIELD INVESTIGATIONS
DCS6615
URGENT - DISTRIBUTE IMMEDIATELY
Date:
June 29, 2023
Subject: N232403290 Service Update
Incorrect Transmission Thrust Washer
Models: 2023 Chevrolet Silverado 1500 and GMC Sierra 1500
Equipped with 8 - Speed Automatic Transmission (RPO MQE)
To:
General Motors is releasing Service Update N232403290 today. The total
number of U.S. vehicles involved is approximately 1 (VIN:
1GTRUAEK5PZ223281). Please see the attached bulletin for details.
Global Warranty Management (GWM)
The Required Field Action section on the Investigate Vehicle History (IVH) screen will
be updated June 29, 2023.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS
Service Update
N232403290 Incorrect Transmission Thrust Washer
Release Date:
Attention:
June 2023
Revision:
00
This service update involves vehicles in dealer inventory only and will expire July 31, 2024.
Please Note: This field action only involves 3 vehicles. The VINs are listed below:
1GTRUAEK5PZ223281
1GCPDAEK7PZ210703
1GCPDDEK1PZ165260
Model
Silverado 1500
Sierra 1500
Model Year
From
To
RPO
2023
MQE
2023
Description
8 - SPEED AUTOMATIC
TRANSMISSION
This service update should be performed on vehicles in dealer inventory only. Involved vehicles are marked “Open” on
the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked
to confirm vehicle involvement prior to beginning any required inspections and/or repairs.
Condition
Correction
Certain 2023 model year Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles may have a condition
in which the incorrect thrust washer was installed in the transmission input carrier.
Dealers are to replace the transmission.
Parts
Quantity
1
12
Part Name
Part No.
24045085
19417577 US
19418066 CA
84407373
84308104
24245110
23135703
Transmission
Dexron HP Transmission Fluid*
1
Exhaust System Front Gasket
1
Transfer Case Front Output Shaft Boot Clamp
1
Transfer Case Adapter Gasket
1
Transmission Fluid Cooler Pipe Seal
*Or obtain local equivalent to GM Dexron HP spec, GMW16974
It is estimated that only 3 involved vehicles will require parts replaced. Due to the small number of vehicles anticipated
that will need this fix and the limited initial parts availability, dealers are encouraged not to order these parts for
use as shelf stock.
Reminder: Parts may be removed from Retail Inventory Management (RIM). Dealers should review the affected parts
to confirm RIM managed status. Parts may have quantity limiters in effect.
Warranty Information
Labor
Operation
9106904
Description
Transmission Replacement
2WD
4WD
Labor
Time
Trans.
Type
Net
Item
5.6
7.5
ZFAT
N/A
Service Procedure
Replace the transmission. Refer to Transmission Replacement in SI by the applicable RPO codes for your vehicle.
Dealer Responsibility
Dealers must take the steps necessary to ensure that the service update correction has been made to all involved vehicles
in dealer inventory before selling or dealer-trading the vehicle, but no later than July 31, 2024.
All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers' possession
and subject to this bulletin must be held and inspected/repaired per the service procedure of this bulletin before customers
take possession of these vehicles. Involved vehicles must be held and not delivered to customers, dealer-traded,
released to auction, used for demonstration, or any other purpose.
All GM Certified Used vehicles currently in the dealers’ inventory within the Certified Pre-Owned Inventory System
(CPOIS) will be de-certified and must be held and remedied per the service procedure in this bulletin. Upon submitting
an accepted/paid warranty transaction in the Global Warranty Management (GWM) system, the vehicle can be re-certified
for sale within the CPOIS system, or once again be used in the CTP program.
Copyright 2023 General Motors. All Rights Reserved.
Page 1 of 2
Service Update
N232403290 Incorrect Transmission Thrust Washer
Dealer Reports – For USA & Export
The Inventory tab of the Open Vehicle Report will contain Service Update Bulletin VINs that apply to this field action.
This information is intended to assist dealers with the PROMPT COMPLETION of these vehicles. The Customer InService tab will not contain Service Update Bulletin VIN data because the intent of a Service Update Bulletin is to not
inconvenience a customer with a special trip for service. Service Update Bulletins are to be completed when the
customer is in for a regularly scheduled visit.
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 tools, equipment, 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 dealer for information on whether your
vehicle may benefit from the information.
We Support
Voluntary Technician
Certification
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TSB/Document ID: N232403290
Replacement Service Bulletin Number:
MFR Communication Date: 2023-06-29
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
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