Customer Satisfaction Program
N242455301 Potential Engine Block Contamination
Release Date:
Attention:

August 2024

Revision:

00

Vehicles involved in this program were placed on stop delivery June 13, 2024, under reference number
N242455300. These vehicles remain on stop delivery. Once sufficient parts are available for these
vehicles, this bulletin will be revised including floor plan reimbursement, and the VIN status for these
vehicles will be moved and marked as “Open” under N242455301. We anticipate part availability in the
near future for these vehicles.
All involved vehicles that are in dealer inventory must be held and not delivered to customers, dealer
traded, or used for demonstration purposes until the bulletin is revised and VIN status placed in an “Open”
status. At that time, the vehicle can be repaired and delivered to the customer.
This is a phased launch.
For Phase 1: Certain vehicles have been placed in “Open” status in IVH and can be repaired following
the service procedure below. All other vehicles will remain in an “Incomplete. Remedy Not Available”
status in IVH.
This program is in effect until September 30, 2026.

Make
Chevrolet
Chevrolet
Chevrolet
GMC
GMC
GMC

Model
Silverado 1500
Suburban
Tahoe
Sierra 1500
Yukon
Yukon XL

Model Year
From
To

RPO

Description

2024

L84

ENGINE – GAS, 8 CYL, 5.3L,
V8, DI, DFM, ALUM, GEN 5

2024

Certain 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 model year Chevrolet Silverado 1500, Suburban, Tahoe, and GMC Sierra 1500, Yukon,
and Yukon XL vehicles, equipped with a 5.3L gas engine (RPO L84), may have contamination in the
engine block.
Dealers are to replace the engine.

Parts
Quantity
1
2
10
2
1
1
1
2
1
1
1
2
1
1
1
8
1
8

Part Name
L84 (5.3L) V8 Gasoline Engine
SEAL, A/C CMPR&CNDSR HOSE
BOLT, EXH MANIF
GASKET, EXH MANIF
PIPE, FUEL FEED INTER
GASKET, F/PMP BRKT
PIPE, FUEL FEED INTER
SEAL KIT, F/INJR (O RING)
BELT, ACSRY DRV PRIM
BELT KIT, A/C CMPR
GASKET, ENG OIL CLR
RETAINER, ENG OIL CLR
SEAL, OIL LVL IND TUBE (O RING)
SEAL, EXH SYS (METAL DONUT)
SEAL, EXH SYS (METAL O-RING)
GASKET, INT MANIF
FILTER, OIL
OIL, ENG (DEXOS1 GEN3)

4

COOLANT, ENGINE (DEXCOOL PREMIX 50/50)

2

GASKET, W/PMP

Copyright 2024 General Motors. All Rights Reserved.

Part No.
12740074
13579648
11546600
12657093
12679463
12679867
12703668
12726902
12669858
12658178
23129010
22988272
24504031
15035747
15077362
12626354
12735811
19432331 US
19432456 CA
12378390 US
10953456 CA
12682391
Page 1 of 4

Customer Satisfaction Program
N242455301 Potential Engine Block Contamination
6
2
3
2

BOLT, ENG MT FRM SI
SEAL, TRANS FLUID CLR PIPE FTG
SEAL, A/C CMPR&CNDSR HOSE
GASKET, VLV RKR ARM CVR

11549180
85639955
13579649
12619787

Note: Use the VIN and the GM Electronic Parts Catalog (EPC) to determine which parts to order.
IMPORTANT: Due to limited initial parts availability, DO NOT ORDER parts included in this field action for use as
shelf stock (DRO) as they will cancel. Parts should only be ordered when the dealer has confirmed and validated,
and their VIN is included in the open list. Parts required to complete this repair are to be obtained from General
Motors Customer Care and Aftersales (GMCC&A). Dealers MUST place orders CSO (Customer Special Order)
and upgrade to SPAC with a VIN. Place the VIN # in the notes field of the order. If there is no VIN in the notes
field your order will be cancelled. Only SPAC orders with a valid VIN associated with the vehicle listing will be
released while on the order writing control. Due to order writing control orders will not ship as OVN. Please take
this into consideration in shipping if not coming from your Admin PDC.
Reminder: Parts will be removed from SPRINT, they are non-returnable and 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. For Export: Please contact CCA’s Export Order Fulfillment group to place the order on your behalf.
Note: All vehicles will be required to reuse the intake manifold from the engine currently in the vehicle. For police package
(RPO 9C1) vehicles, the LH and RH Valve Rocker Arm Covers will need to be swapped over from the engine in the
vehicle to the replacement engine as well. Valve Rocker Arm Cover Gaskets are not needed for non-police package
vehicles.
Engine Return Instructions: Assemblies with core charges must be retained for 72 hours beyond receipt of transaction
payment shown in the Global Warranty Management System on the Transaction Summary Report. If a Warranty Parts
Center (WPC) part return request is not received within 72 hours, the core can be shipped to the Core Return Center.
For additional information, please refer to the Core Return Policies within the Service Policies and Procedures Manual.
Warranty Information
Labor
Operation
9107609

Description
Engine Replacement (Includes recover/recharge refrigerant)
Silverado/Sierra
2WD
4WD
Yukon/Yukon XL
2WD
2WD with F47 RPO
4WD
4WD with F47 RPO
Tahoe/Suburban
2WD
2WD with F47 RPO
4WD
4WD with F47 RPO

Labor
Time

Trans.
Type
ZFAT

Net
Item
N/A

19.7
19.8
19.6
19.7
19.7
19.8
19.2
19.3
19.3
19.4

Service Procedure
IMPORTANT: If a vehicle you are working on for this field action has had a catastrophic engine failure, refer to 22-NA074 for additional instructions. It will be necessary to H-route the warranty transaction for approval for the additional parts
and labor required if there was a catastrophic engine failure.
Replace the engine. Refer to Engine 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
Page 2 of 4

Customer Satisfaction Program
N242455301 Potential Engine Block Contamination
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 September 30, 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 September 30, 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.
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

Page 3 of 4

Customer Satisfaction Program
N242455301 Potential Engine Block Contamination
September 2024
This notice applies to your vehicle, VIN: ________________________________
Dear General Motors Customer:
We have learned that your 2024 model year Chevrolet Silverado 1500, Suburban, Tahoe, or GMC Sierra 1500, Yukon,
or Yukon XL vehicle may have contamination in the engine block.
Your satisfaction with your GM 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 engine. This service will be performed for you at no charge until
September 30, 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 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

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
N242455301

Page 4 of 4

GENERAL MOTORS
DCS6991
URGENT - DISTRIBUTE IMMEDIATELY
Date:

August 26, 2024

Subject: N242455301 - Customer Satisfaction Program
Potential Oil Gallery Engine Block Contamination
Models: 2024 Chevrolet Silverado 1500
2024 Chevrolet Suburban
2024 Chevrolet Tahoe
2024 GMC Sierra 1500
2024 GMC Yukon
2024 GMC Yukon XL
Equipped with 5.3L Gas Engine (RPO L84)

General Motors is releasing Customer Satisfaction Program N242455301
today.
This is a phased launch.
Vehicles involved in this program were placed on stop delivery June 13, 2024,
under reference number N242455300. These vehicles remain on stop delivery.
Once sufficient parts are available for these vehicles, this bulletin will be revised
including floor plan reimbursement, and the VIN status for these vehicles will be
moved and marked as “Open” under N242455301. We anticipate part availability
in the near future for these vehicles.
All involved vehicles that are in dealer inventory must be held and not delivered to
customers, dealer traded, or used for demonstration purposes until the bulletin is
revised and VIN status placed in an “Open” status. At that time, the vehicle can
be repaired and delivered to the customer.
For Phase 1: Certain vehicles have been placed in “Open” status in IVH and can
be repaired following the service procedure in the bulletin. All other vehicles will
remain in an “Incomplete. Remedy Not Available” status in IVH.
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.
END OF MESSAGE