GENERAL MOTORS
DCS7096
URGENT - DISTRIBUTE IMMEDIATELY
Date:

December 9, 2024

Subject: N242470190 - Customer Satisfaction Program
Incompatible SDGM Installed
Models: 2024 Chevrolet Corvette
2024 Chevrolet Silverado EV
2024 GMC Hummer EV Pickup
2025 GMC Hummer EV SUV
General Motors is releasing Customer Satisfaction Program N242470190
today.
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

Customer Satisfaction Program
N242470190 – Incompatible SDGM Installed
Release Date:
Attention:

December 2024

Revision:

00

For EV Involved Vehicles: The repairs outlined in this bulletin must only be completed at an authorized
EV dealer and repairs must be performed by a technician who has successfully completed the
applicable technical training required to perform this repair.
This program is in effect until December 31, 2026.

Make
Chevrolet
Chevrolet
GMC
GMC

Model
Corvette
Silverado EV
Hummer EV Pickup
Hummer EV SUV

Model Year
From
To
2024

RPO

Description

2024

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 vehicles listed above, may have been built with a Serial Data Gateway Module (SDGM) that is
incompatible with the vehicle’s software.
Dealers will replace the SDGM.

Parts
Quantity
1

Part Name
MODULE, SERIAL DATA GATEWAY

Part No.
13552977

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. There is a
small number of vehicles anticipated that will need this fix. Due to the limited initial parts availability, dealers are
encouraged not to order these parts for use as shelf stock.

Warranty Information
Labor
Operation
9107532*

Description
Replace Serial Data Gateway Module (Includes Programming and
Setup)
Hummer EV
Silverado EV
Corvette
Important:

Labor
Time

Trans.
Type

Net
Item

0.6
1.0
1.6

ZFAT

N/A

* To avoid warranty transaction rejections, carefully read and follow the instructions

below:

6125814

• The Warranty Claim Code from the programming event must be accurately entered in the “Warranty Claim
Code” field of the transaction.
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Customer Satisfaction Program
N242470190 – Incompatible SDGM Installed
Service Procedure
1.

Replace the K56 Serial Data Gateway Module. Refer to Serial Data Gateway Module Replacement in SI.

•

Follow the on-screen prompts regarding ignition power mode, but ensure that anything that drains excessive power
(exterior lights, HVAC blower motor, etc) is off.

•

Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection/Maintenance (I/M)
system status indicators to NO.

Caution: Be sure the VIN selected in the drop down menu (1) is the same as the vehicle connected (2) before beginning
programming.

5743643

Important: Techline Connect screen shown above.

2.

Program the K56 Serial Data Gateway Module. Refer to Serial Data Gateway Module: Programming and Setup in SI.

5644478

Important: To avoid warranty transaction rejections, you MUST record the warranty claim code provided on the
Warranty Claim Code (WCC) screen shown above on the job card. Refer to callout 1 above for the location of the
WCC on the screen.
3.

Record SPS Warranty Claim Code on job card for warranty transaction submission.

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Customer Satisfaction Program
N242470190 – Incompatible SDGM Installed
Warranty Claim Code Information Retrieval

6125774

If the Warranty Claim Code was not recorded on the Job Card, the code can be retrieved in the SPS2 system as
follows:
1.
2.
3.
4.

Open TLC on the computer used to program the vehicle.
Select and start SPS2.
Select Settings (1).
Select the Warranty Claim Code tab (2).

The VIN, Warranty Claim Code and Date/Time will be listed on a roster of recent programming events. If the code is
retrievable, dealers should resubmit the transaction making sure to include the code in the SPS Warranty Claim Code
field

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
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.
Dealers are to service all vehicles subject to this program at no charge to customers, regardless of mileage, age of vehicle,
or ownership, through the end date as noted in the Attention box. 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 follow-up 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 the end date as noted in the Attention box, 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
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Customer Satisfaction Program
N242470190 – Incompatible SDGM Installed
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.
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 sample customer letter
included with this bulletin).

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
N242470190 – Incompatible SDGM Installed

This notice applies to your vehicle, VIN: ________________________________
Dear General Motors Customer:
We have learned that your GM vehicle may have been built with a Serial Data Gateway Module (SDGM) that is
incompatible with the vehicle’s software.
Your satisfaction with your vehicle 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 SDGM. This service will be performed for you at no charge until
December 31, 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. If your vehicle is an EV, confirm with the dealer
that they are an EV certified dealer when scheduling your appointment.
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
Chevrolet Silverado EV
GMC HUMMER EV/SUV
Puerto Rico – English

Number
1-800-222-1020
1-833-EVCHEVY
(1-833-382-4389)
1-833-HUMMER-EV
(1-833-486-6373)
1-866-467-9700

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
N242470190

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