GENERAL MOTORS
DCS7276
URGENT - DISTRIBUTE IMMEDIATELY
Date:

July 23, 2025

Subject: REVISION: N242480631-04 – Special Coverage
Momentary Wheel Lock-Up
Additional Vehicles Added
Models: 2019-2020 Cadillac CT6
2020-2021 Cadillac CT4
2020-2021 Cadillac CT5
2020-2022 Chevrolet Camaro

This bulletin is being revised to add additional vehicles. Please discard all previous
copies of bulletin N242480631.
This phased launch is now complete.

END OF MESSAGE

Special Coverage
N242480631 Momentary Wheel Lock-Up
Release Date:
Revision Description:

Attention:

July 2025

Revision:

04

This bulletin is being revised to add additional vehicles. Please discard all previous copies
of bulletin N242480631.

This Special Coverage can be seen in the Applicable Warranties section in Investigate Vehicle History
(IVH).
This phased launch is now complete.
Model Year

Make
Cadillac
Cadillac
Cadillac
Chevrolet

Model
CT6
CT4
CT5
Camaro

From
2019
2020
2020
2020

To
2020
2021
2021
2022

Involved vehicles are identified on the Applicable Warranties section 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

Special
Coverage

Certain vehicles listed above, may have a condition where the transmission control valve has worn,
resulting in a gradual loss of pressure within the valve. The effects can cause harsh shifting, setting a
service engine soon message, reduced engine performance or P0747 diagnostic trouble code.
This special coverage covers vehicles that return after TCM Update Product Safety N242480630 and
have P0747 condition described above for a period of 15 years or 150,000 miles (240,000 km), whichever
occurs first, from the date the vehicle was originally placed in service, regardless of ownership.
For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after March
6, 2025, are covered by this special coverage and must be submitted using the labor operation codes
provided with this bulletin. Claims with repair orders prior to March 6, 2025, must be submitted to the
Service Contract provider.

Correction

Vehicle owners or lessees who paid for repairs referenced in this Special Coverage (“Customers”) are
eligible for reimbursement of their reasonable and customary expenses in accordance with the
procedures specified below. The conditional right to reimbursement is provided by GM solely in the
interest of customer satisfaction and is personal to Customers. Customers may not assign and GM
does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to
receive reimbursement, or any other rights granted by this Special Coverage to any third party,
including but not limited to service contract providers, and this Special Coverage is not intended to and
does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to
reimbursement, against GM, whether in law, equity or otherwise, on any third parties.
Dealers are to install a new control valve body. The repairs will be made at no charge to the customer.

Parts
*Use the VIN and the GM Electronic Parts Catalog (EPC) to determine which VALVE BODY ASSEMBLY to order.
Quantity
1
9

Part Name
VALVE ASM-CONT (W/ BODY & VLV)
TRANSMISSION FLUID QUART (DEXRON ULV)

1
1
1
1

SEAL, A/TRNS FLUID PUMP
SEAL, A/TRNS AUX FLUID PUMP OTLT PIPE
SEAL, A/TRNS AUX FLUID PUMP
FILTER KIT, A/TRNS FLUID (Includes filter Seal)

Part No.
*
19352619
(19352620
Canada)
24290889
24271818
24047734
24294355

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.

Page 1 of 4

Special Coverage
N242480631 Momentary Wheel Lock-Up
Warranty Information
Labor
Operation
9900920

Description
Inspect for DTC P0747

Labor
Time
0.2

Trans.
Type
ZREG

Net
Item
N/A

ZREG

**

ZREG

***

ADD: Control Valve Body Replacement

9900921

9900922
**

CT4
CT5
CT6
Camaro

1.7
1.9
1.5
1.3

Customer Reimbursement Approved
- For USA and Canada dealers only
- For Export dealers only
Customer Reimbursement Denied – For USA dealers only

N/A
0.2
N/A

For USA and 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
1.

Check for DTC P0747.
1.1. If DTC P0747 is set, continue to step 2.
1.2. If DTC P0747 is NOT SET, no further action required.

2.

Replace control valve body. Refer to Control Valve Body Replacement in SI.

3.

Perform the solenoid valve characterization reprogramming procedure. Refer to Transmission Control Solenoid
Valve Characterization Programming in SI.

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
General Motors will notify Customers of this special coverage on their vehicle (see copy of sample Customer letter
included with this bulletin).
Customer Reimbursement
Customer requests for reimbursement of previously paid repairs to correct the condition described in this bulletin are to
be submitted to the dealer prior to or by March 31, 2026. See General Motors Service Policies and Procedures Manual
(USA & Canada) or local Policies and Procedures, for details.

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

Page 2 of 4

Special Coverage
N242480631 Momentary Wheel Lock-Up

This notice applies to your vehicle, VIN: _____________________________________
Dear General Motors Customer:
As the owner of a GM vehicle, your satisfaction with our product is very important to us.
This letter is intended to make you aware that some vehicles may have a condition where the transmission control valve
has worn, resulting in a gradual loss of pressure within the valve. The effects can cause harsh shifting, setting a service
engine soon message, reduced engine performance or P0747 diagnostic trouble code.
Do not take your vehicle to your GM dealer as a result of this letter unless you believe that your vehicle has the
condition as described above.
What We Have Done: General Motors is providing owners with additional protection for the condition described above.
If this condition occurs on your GM vehicle within 15 years of the date your vehicle was originally placed in service or
150,000 miles (240,000 km), whichever occurs first, the condition will be repaired for you at no charge. Diagnosis or
repair for conditions other than the condition described above is not covered under this special coverage program. For
customer’s vehicles already outside of the above years and/or miles, we are still offering reimbursement if the issue
occurred within the years and miles stated above. Please follow the reimbursement steps below.
What You Should Do: If you believe that your vehicle has the condition described above, repairs and adjustments
qualifying under this special coverage must be performed by a General Motors dealer. You may want to contact
your GM dealer to find out how long they will need to have your vehicle so that you may schedule the appointment at a
time that is convenient for you. This will also allow your dealer to order parts if they are not already in stock. Keep this
letter with your other important glove box literature for future reference.
Reimbursement: If you already paid for repairs for the condition described in this letter, and those repairs were
completed prior to this mailing, please complete the enclosed reimbursement form and present it to your dealer with
all required documents. Working with your dealer will expedite your request, however, if this is not convenient, you may
mail the completed reimbursement form and all required documents to Reimbursement Department, PO Box 33170,
Detroit, MI 48232-5170. The completed form and required documents must be presented to your dealer or received by
the Reimbursement Department by March 31, 2026, unless state law specifies a longer reimbursement period.
The right to submit reimbursement claims is provided by GM solely in the interest of customer satisfaction and is
personal to vehicle owners and lessees who previously paid for repairs referenced in this Special Coverage
(“Customers”). Customers may not assign and GM does not consent to any assignment of any Customer’s right
to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special
Coverage to any third party, including but not limited to service contract providers, and this Special Coverage
is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any
other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties.
You may schedule your vehicle for repair using the QR code below. For more information about your vehicle, or if you
have questions or concerns that your dealer is unable to resolve, please visit gm.com/service, or call the Buick,
Chevrolet or GMC Customer Assistance Center at 1-866-467-9700. For Cadillac, please call 1-800-333-4223.
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.
We are sorry for any inconvenience you may experience; however, we have taken this action in the interest of your
continued satisfaction with our products.
Neelie O’Connor
Global Executive Director
Customer Experience Operations
Scan here to
locate a dealer.

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Special Coverage
N242480631 Momentary Wheel Lock-Up

Enclosure
N242480631

Page 4 of 4