GENERAL MOTORS
DCS7023
URGENT - DISTRIBUTE IMMEDIATELY
Date:

September 20, 2024

Subject: N242455950 - Service Update
Sediment Found in Transmission
Models: 2024-2025 Chevrolet Silverado 2500HD/3500HD
2024-2025 GMC Sierra 2500HD/3500HD

General Motors is releasing Service Update N242455950 today.
This is a phased launch.
Certain VINs will be marked “Open” in this initial phase. Please verify a VIN's
involvement by checking in IVH prior to ordering any parts. IVH is the best
source for individual VIN inquiries.
What Should Dealers Do: Dealers should review IVH or the Dealer Maxis reports
for open VINs in their inventory. Dealers can view the attached bulletin and it
will also be displayed in Service Information tomorrow.
A Stock VIN list is not included as our records show there are no vehicles in
dealer new inventory.

END OF MESSAGE

Service Update
N242455950 Sediment Found in Transmission
Release Date:
Attention:

September 2024

Revision:

00

This service update includes vehicles in dealer inventory and customer vehicles that return to the
dealership for any reason. This bulletin will expire at the end of the involved vehicle’s New Vehicle Limited
Warranty period.
This is a phased launch.
Certain VINs will be marked “Open” in this initial phase. Please verify a VIN's involvement by checking
in IVH prior to ordering any parts. IVH is the best source for individual VIN inquiries.

Make
Chevrolet
GMC

Model
Silverado 2500HD/3500HD
Sierra 2500HD/3500HD

Model Year
From
To
2024

RPO

Description

2025

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 2024-2025 model year Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD
vehicles, may have a condition in which sediment is being generated during the Output Shaft bearing
press.
Dealers will replace the Transmission Filter.

Parts
Quantity
1
15 Qt
14 L

Part Name
FILTER KIT
FLUID,A/TRANS (DEXRON ULV ATF)

Part No.
24298004
19352619
(US)
19352620
(Canada)

FLUID,A/TRANS (DEXRON ULV ATF)

Reminder: Parts may be removed from SPRINT and Retail Inventory Management (RIM) and be non-returnable.
Dealers should review the affected parts to confirm RIM managed status. Parts may have quantity limiters in effect.
Due to the limited initial parts availability, dealers are encouraged not to order these parts for use as shelf
stock.
Warranty Information
Labor
Operation
9107625

Description
Replace Transmission Fluid And Filter
Base
With L8T

Labor
Time

Trans.
Type

Net
Item

1.6
2.2

ZFAT

N/A

Service Procedure
Note: When removing the transmission fluid pan, support the pan and remove the bolts from the rear of the
transmission towards the front. Allow the transmission to drain before removing the pan entirely, or fluid spill will occur.
1.

Remove and replace the Transmission Fluid Filter. Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter
Replacement in SI.

2.

Fill the transmission with fluid and set the fluid level. Refer to Transmission Fluid Fill Procedure in SI.

Dealer Responsibility
Whenever a vehicle subject to this service update enters your vehicle inventory or is in your facility for service in the
future, and the vehicle is still covered under the New Vehicle Limited Warranty, you must take the steps necessary to be
sure the service update correction has been made before selling or releasing the vehicle.
All new, used, GM Certified Pre-Owned (CPO), courtesy transportation vehicles, dealer shuttle vehicles, CarBravo, etc.
in dealers' possession and subject to this field action must be held and inspected/repaired per the service procedure of

Copyright 2024 General Motors. All Rights Reserved.

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Service Update
N242455950 Sediment Found in Transmission
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 Pre-Owned (CPO) vehicles currently in the dealers’ inventory within the SHIFT Digital system 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 SHIFT Digital system, or once again be used in the Courtesy Transportation Program.
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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