GENERAL MOTORS
DCS7268
URGENT - DISTRIBUTE IMMEDIATELY
Date:

July 16, 2025

Subject: N252502891 - Customer Satisfaction Program
Rear Electric Drive Transmission Module Replacement
Models: 2025 Cadillac Escalade IQ
2024-2025 Cadillac LYRIQ
2024 Chevrolet Blazer EV
2024 Chevrolet BrightDrop Zevo 400
2025 Chevrolet BrightDrop 600
2024 Chevrolet Silverado EV
2025 GMC Sierra EV

General Motors is releasing Customer Satisfaction Program N252502891
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.
For dealers with involved vehicles, a listing has been prepared and will be
available through GM Global Connect Maxis Field Action Reports or GWM Field
Action Batch Search Report. 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.

END OF MESSAGE

Customer Satisfaction Program
N252502891 Rear Electric Drive Transmission Module Replacement
Release Date:
Attention:

July 2025

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.
Investigate Vehicle History (IVH) in the GM Global Warranty Management system MUST always
be checked to confirm vehicle involvement and MUST be in OPEN status prior to beginning any
required inspections and/or repairs. DO NOT use Service Information with VIN search, as it will
not verify the VIN eligibility for field actions.
This program is in effect until August 31, 2027.
Model Year

Make
Cadillac
Cadillac
Chevrolet
Chevrolet
Chevrolet
Chevrolet
GMC

Model
Escalade IQ
LYRIQ
Blazer EV
BrightDrop Zevo 400
BrightDrop 600
Silverado EV
Sierra EV

From
2025
2024
2024
2024
2025
2024
2025

To
2025
2025
2024
2024
2025
2024
2025

Investigate Vehicle History (IVH) in the GM Global Warranty Management system MUST always be checked to confirm
vehicle involvement and MUST be in OPEN status prior to beginning any required inspections and/or repairs. DO NOT
use Service Information with VIN search, as it will not verify the VIN eligibility for field actions.
Condition
Correction

Certain vehicles listed above may have a condition in which the internal differential nut was cross
threaded or missing during assembly.
Dealers will review the vehicles service history in IVH, and if necessary, replace the rear electric drive
transmission module.

Parts
Blazer EV & LYRIQ P77
Quantity
1
2
2
2
2
2
1
3
As Req’d
(Up to 4.6
Qts/4.4 L)
As Req’d
(Up to 3.2
Gal/12L)

Part Name
MODULE, RR ELEC DRV TRANSAXLE
BOLT, RR S/ABS
BOLT, RR SUSP LINK
BOLT, RR SUSP TRAILING ARM
BOLT, RR SUSP UPR CONT ARM INR
BOLT, RR DRV MOT RR MT
BOLT, RR DRV MOT MT
BOLT, RR DRV MOT MT (LYRIQ Only)

Part No.
*
11589358
11610909
11609606
11610884
11603529
11589282
11609605

FLUID-A/TRANS (Dextron ULV)

19352619 (US)
19352620 (CAN)

COOLANT, HIGH VLTG BAT (Dexcool)

12378390 (US)
10953456 (CAN)

Blazer EV S78
Quantity
1
2
1
As Req’d
(Up to 0.9
Qts/0.8L)

Part Name
MODULE, RR ELEC DRV TRANSAXLE
BOLT, RR DRV MOT RR MT
BOLT, RR DRV MOT MT

FLUID-A/TRANS

Part No.
*
11571089
11517236
19352619 (US)
19352620 (CAN)

Page 1 of 4

Customer Satisfaction Program
N252502891 Rear Electric Drive Transmission Module Replacement
Silverado EV, Sierra EV & Escalade IQ
Quantity
1
2
2
5
4
As Req’d
(Up to 4.5
Qts/4.3 L
As Req’d
(Up to 5.7
Gal/21.6L)

Part Name

Part No.

MODULE, RR ELEC DRV TRANSAXLE
NUT, RR WHL DRV SHF
WASHER, FRT WHL DRV SHF
BOLT/SCREW-DIFF CARR FRT
BOLT, RR DRV MOT MT

*
11612295
11605101
11604512
11609605

FLUID-A/TRANS

19352619 (US)
19352620 (CAN)

COOLANT, HIGH VLTG BAT

12378390 (US)
10953456 (CAN)

Parts - BrightDrop 400 & 600
Quantity
1
2
2
4
8
2
4
As Req’d
(Up to 4.5
Qts/4.3 L
As Req’d
(Up to 4.8
Gal/18 L)

Part Name

Part No.

MODULE, RR ELEC DRV TRANSAXLE
NUT, RR WHL DRV SHF
WASHER, RR WHL DRV SHF
BOLT, RR BRK CLPR BRKT
BOLT, RR AXLE KNU
BOLT, RR DRV MOT RR MT
BOLT, DRV MOT MT

*
11612295
11605101
11570788
11610880
11603529
11609605

FLUID-A/TRANS

19352619 (US)
19352620 (CAN)

COOLANT, HIGH VLTG BAT

12378390 (US)
10953456 (CAN)

*Note: Use the VIN and the GM Electronic Parts Catalog (EPC) to determine which Rear Drive Unit to order.
For the Drive Units (Remedy Parts) –For U.S. and Canada:
TAC Restriction
The Drive Units required for this program are on restriction through the GM Technical Assistance Center (TAC). Please
contact TAC at telephone number US 1-877-446-8227 (Action Center prompt) or Canada 1-800-263-7740 for English or
1-800-263-7960 for French.
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.
Warranty Information
Labor
Operation
9107975

9107976

Description
Inspect VIN in IVH, No Further Action Required.
Rear Electric Drive Transmission Module Replacement
Blazer EV & Lyriq w/ P77 or P79
Blazer EV w/ S78
Silverado EV/Sierra EV
BrightDrop 400/600
Escalade IQ

Labor
Time
0.2
8.3
2.2
6.0
8.9
ST

Trans.
Type

Net
Item

ZFAT

N/A

Service Procedure
1.

In Global Warranty Management (GWM), look up the VIN in Investigate Vehicle History (IVH) to verify the VIN has
not previously had a Rear Electric Drive Transmission Module replaced under the VIN’s “Transaction History”.
•

If the VIN has previously had a Rear Electric Drive Transmission Module replaced, no further action is required.
Page 2 of 4

Customer Satisfaction Program
N252502891 Rear Electric Drive Transmission Module Replacement
•
2.

If the VIN has NOT previously had a Rear Electric Drive Transmission Module replaced, proceed to step 2.

Replace the Rear Electric Drive Transmission Module. Refer to Rear Electric Drive Transmission Module
Replacement 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
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
For dealers with involved vehicles, a listing has been prepared and will be available through GM Global Connect Maxis
Field Action Reports or GWM Field Action Batch Search Report. 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.
Courtesy Transportation
USA - For repairs covered under this Field Action, Courtesy Transportation can be made available ONLY if the
customer/vehicle qualify for Courtesy Transportation per Bulletin 07-00-89-037.
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. Refer to the most current Home Office Letter (YYYY-604) on the Courtesy
Transportation Program for 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).
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

Page 3 of 4

Customer Satisfaction Program
N252502891 Rear Electric Drive Transmission Module Replacement

This notice applies to your vehicle, VIN: ________________________________
Dear General Motors Customer:
We have learned that your GM vehicle may have a condition in which the internal differential nut was cross threaded or
missing during assembly.
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 review the vehicles service history in IVH, and if necessary, replace the rear
electric drive transmission module. This service will be performed for you at no charge until August 31, 2027. 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 are an EV certified dealer.
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 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
Scan here to
locate a dealer.

N252502891

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