GLOBAL SAFETY FIELD INVESTIGATIONS
DCS6782
URGENT - DISTRIBUTE IMMEDIATELY
Date:

February 5, 2024

Subject: N232428780 - Customer Satisfaction Program
Valve Body Spacer Plate Wear Prematurely
Models: 2017 Chevrolet Express
2021 Chevrolet Express
2017 Chevrolet Express Navistar
2021 Chevrolet Express Navistar
2017 GMC Savana
2021 GMC Savana
To:

All General Motors Dealers

General Motors is releasing Customer Satisfaction Program N232428780
today. The total number of U.S. vehicles involved is approximately 3,816.
Please see the attached bulletin for details.
Customer Letter Mailing
The customer letter mailing will begin near the end of February 2024.
Global Warranty Management (GWM)
The Required Field Action section on the Investigate Vehicle History (IVH) screen will
be updated February 5, 2024. Please verify a VIN's involvement by checking in IVH.
IVH is the best source for individual VIN inquiries. A Stock VIN list is not included as
our records show there are no vehicles in dealer new inventory.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS

Customer Satisfaction Program
N232428780 Valve Body Spacer Plate Wear Prematurely
Release Date:
Attention:

February 2024

Revision:

00

It is recommended that Medium Duty dealers complete this field action repair.
If it is not possible for the customer to take the vehicle to a Medium Duty Dealer, verify the
equipment of the servicing dealer meets or exceeds the vehicle weight and can safely and
properly lift the vehicle.
This program is in effect until February 28, 2026.

Make
Chevrolet
Chevrolet
Chevrolet
Chevrolet
GMC
GMC

Model
Express
Express
Express Navistar
Express Navistar
Savana
Savana

Model Year
From
To
2017
2017
2021
2021
2017
2017
2021
2021
2017
2017
2021
2021

RPO

Description

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 2017 and 2021 model year Chevrolet Express, Chevrolet Express Navistar, and GMC Savana
vehicles may have a condition in which the transmission Control Valve Body Ball Check Valves can wear
prematurely resulting in the possibility for them to become stuck or pass through the Control Valve Body
Spacer Plate. The customer may not be able to shift into drive from park or reverse at the start of vehicle
operation.
Dealers are to replace the transmission Control Valve Body Spacer Plate package.

Parts
Quantity
1
1
As Req'd (up to 6.0 quarts)
As Req'd (up to 5.7 liters)

Part Name
Control Valve Body Spacer Plate Package
Seal Kit
DEXRON®VI Automatic Transmission Fluid (US)
DEXRON®VI Automatic Transmission Fluid (CA)

Part No.
24272467
24236927
88865601
19421425

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
9107137

9107142
9107143

Description
Control Valve Body Spacer Plate and Control Valve Body Ball Check
Valve Replacement
Customer Reimbursement Approved
- For USA and Canada dealers only
- For Export dealers only
Customer Reimbursement Denied – For USA dealers only

Labor
Time

Trans.
Type

Net
Item

2.6

ZFAT

N/A

N/A
0.2
N/A

ZFAT

*

ZFAT

**

* For USA & Canada: Submit the dollar amount reimbursed to the Customer in Net/Reimbursement. Submit $20.00 USD
($25.00 CAD) administrative allowance in Net/Admin Allowance.
For Export: Submit the dollar amount reimbursed to the Customer in Net/Reimbursement.
** Submit $10.00 administrative allowance in Net/Admin Allowance.
Service Procedure
Important: If it is not possible for the customer to take the vehicle to a Medium Duty Dealer, verify the equipment
of the servicing dealer meets or exceeds the vehicle weight and can safely and properly lift the vehicle.
1.

Remove the Control Valve Lower and Upper Body. Refer to Control Valve Lower Body and Upper Body Replacement
in SI.

Copyright 2024 General Motors. All Rights Reserved.

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Customer Satisfaction Program
N232428780 Valve Body Spacer Plate Produced Improperly

3637898

6529252

2.

Important: Ensure the Lower and Upper Valve Body Assembly is oriented in correct position prior to separating to
prevent the Control Valve Body Ball Check Valves from falling out.
Separate the Control Valve Upper Body from the Control Valve Lower Body. Refer to Control Valve Body Assembly
Disassemble in SI.

3.

Remove and discard the Control Valve Body Spacer Plate (5).

4.

Important: Remove and replace each Control Valve Body Ball Check Valve from the Control Valve Body one at a
time.
One at a time, remove and replace the 8 Control Valve Body Ball Check Valves (6). Discard the removed Control
Valve Body Ball Check Valves.
Install NEW Control Valve Body Spacer Plate (5).

5.

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Customer Satisfaction Program
N232428780 Valve Body Spacer Plate Produced Improperly

3637898

6.

Rejoin the Control Valve Upper Body (7) to the Control Valve Lower Body (4). Refer to Control Valve Body Assembly
Assemble in SI.

7.

Install the Control Valve Lower and Upper Body. Refer to Control Valve Lower Body and Upper Body Replacement
in SI.

8.

Refill Transmission to proper level of Transmission Fluid. Refer to Approximate Fluid Capacities in SI.

Dealer Responsibility
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
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 decertified 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.
Dealers are to service all vehicles subject to this program at no charge to customers, regardless of mileage, age of vehicle,
or ownership, through February 28, 2026. Customers who have recently purchased vehicles sold from your vehicle
inventory, and for which there is no customer information indicated on the involved vehicle listing, are to be contacted by
the dealer. Arrangements are to be made to make the required correction according to the instructions contained in this
bulletin. A copy of the customer letter is provided in this bulletin for your use in contacting customers. Program followup cards should not be used for this purpose, since the customer may not as yet have received the notification letter.
In summary, whenever a vehicle subject to this program enters your vehicle inventory or is in your facility for service
through February 28, 2026, you must take the steps necessary to be sure the program correction has been made before
selling or releasing the vehicle.
Dealer Reports – For USA & Export
For dealers with involved vehicles, a listing has been prepared and will be available through GM GlobalConnect Maxis
Field Action Reports or sent directly to export dealers. The Inventory tab of the dealer reports will contain VINs that
apply to this field action. This information is intended to assist dealers with the PROMPT COMPLETION of these
vehicles. The Customer In-Service tab will contain customer names and addresses from Motor Vehicle Registration
Records. The use of such motor vehicle registration data for any purpose other than follow-up necessary to complete
this field action may be a violation of law in several states.

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Customer Satisfaction Program
N232428780 Valve Body Spacer Plate Produced Improperly
Courtesy Transportation – For USA & Canada
Courtesy transportation is available for customers whose vehicles are involved in a product program and still within the
warranty coverage period. See General Motors Service Policies and Procedures Manual for courtesy transportation
program details.
Customer Notification
USA & Canada - General Motors will notify customers of this program on their vehicle (see copy of customer letter included
with this bulletin).
Export - Letters will be sent to known owners of record located within areas covered by the US National Traffic and Motor
Vehicle Safety Act. For owners outside these areas, dealers should notify customers using the attached sample letter.

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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Customer Satisfaction Program
N232428780 Valve Body Spacer Plate Produced Improperly
February 2024
This notice applies to your vehicle, VIN: ________________________________
Dear General Motors Customer:
We have learned that your 2017 or 2021 model year Chevrolet Express, Chevrolet Express Navistar, or GMC Savana
may have a condition in which the transmission Control Valve Body Ball Check Valves can wear prematurely resulting
in the possibility for them to become stuck or pass through the Control Valve Body Spacer Plate. The customer may not
be able to shift into drive from park or reverse at the start of vehicle operation.
Your satisfaction with your Express or Savana is very important to us, so we are announcing a program to prevent this
condition or, if it has occurred, to fix it.
What We Will Do: Your GM dealer will replace the transmission Control Valve Body Spacer Plate package. This
service will be performed for you at no charge until February 28, 2026. After that, any applicable warranty will apply.
What You Should Do: To limit any possible inconvenience, we recommend that you contact your dealer as soon as
possible to schedule an appointment for this repair. By scheduling an appointment, your dealer can ensure that the
necessary parts will be available on your scheduled appointment date. When scheduling your appointment, confirm with
the dealer that they service Medium Duty Trucks. If it is not possible for you to take the vehicle to a Medium Duty
Dealer, verify the equipment of the servicing dealer meets or exceeds the vehicle weight and can safely and properly lift
the vehicle.
If you have any questions or concerns that your dealer is unable to resolve, please contact the appropriate Customer
Assistance Center at the number listed below.
For the hearing or speech impaired, please contact our Customer Assistance Center using the Telecommunication
Relay Service by dialing 711 then providing the appropriate Customer Assistance Center number for your vehicle.
Division
Chevrolet
GMC
Puerto Rico – English
Puerto Rico – Español
Virgin Islands

Number
1-800-222-1020
1-800-462-8782
1-866-467-9700
1-866-467-9700
1-866-467-9700

Text Telephones (TTY)
711 / 1-800-833-2438
711 / 1-800-833-2438

We truly appreciate you taking the time to remedy your vehicle as we know your time is valuable. We want you to know
that we will do our best, throughout your ownership experience, to ensure that your GM vehicle provides you many
miles of enjoyable driving.
Neelie O’Connor
Global Executive Director
Customer Experience Operations
N232428780

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