N222374570

GLOBAL SAFETY FIELD INVESTIGATIONS
DCS6524
URGENT - DISTRIBUTE IMMEDIATELY
Date:
April 6, 2023
Subject: N222374570 - Customer Satisfaction Program
Incorrect U-bolt Torque Spec in Owner’s Manual and Service
Models: 2019 – 2022 Chevrolet Silverado 4500/5500/6500 Medium Duty
To:
All General Motors Medium Duty Dealers
General Motors is releasing Customer Satisfaction Program N222374570
today. The total number of U.S. vehicles involved is approximately 34,040.
Please see the attached bulletin for details.
Customer Letter Mailing
The customer letter mailing will begin on April 18, 2023.
Global Warranty Management (GWM)
The Required Field Action section on the Investigate Vehicle History (IVH) screen will
be updated April 6, 2023. A list of vehicles in dealer inventory is attached to this
message.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS
Customer Satisfaction Program
N222374570 Incorrect U-bolt Torque Spec in Owner Manual and
Service
Release Date:
Attention:
April 2023
Revision:
00
ONLY Chevrolet Medium Duty dealers can complete this field action repair.
This program is in effect until (April 30, 2025).
Make
Model Year
From
To
Model
Silverado
4500HD/5500HD/6500HD
Medium Duty
Chevrolet
2019
RPO
Description
2022
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 2019-2022 model year Chevrolet Silverado 4500HD/5500HD/6500HD Medium Duty vehicles
may have incorrect instructions in the Owner Manual regarding the front spring U-bolt Service torque
specification.
Dealers will print and insert the revised Owner Manual page(s) for all vehicles. On certain vehicles,
dealers will verify the front spring u-bolt torque and, if necessary, replace the front spring u-bolt and nuts.
Parts
Quantity
4
4
8
Part Name
Part No.
19403045
19403035
19404843
U-Bolt
U-Bolt
Nut
Note: Use the VIN and the GM Electronic Parts Catalog (EPC) to determine which U-bolt to order. Only order parts if
vehicle fails inspection.
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
9106600
9106601
9106602
Description
Print and Install Owner Manual – 4x4 ONLY
Print and Install Owner Manual Insert and verify torque – 4X2
ONLY
Print and Install Owner Manual Insert, verify torque, and replace Ubolt and nuts – 4X2 ONLY
ADD: For each additional U-bolt replacement
Labor Time
0.1
Trans.
Type
ZFAT
Net
Item
N/A
1.0
ZFAT
N/A
ZFAT
N/A
1.3
0.1
Service Procedure
1.
Print the following owner manual insert.
2.
Locate the owner manual.
3.
Install the owner manual inserts to the owner’s manual.
•
If the vehicle is 4x4, no further action is required.
•
If the vehicle is 4x2, continue to step 4.
Copyright 2023 General Motors. All Rights Reserved.
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Customer Satisfaction Program
N222374570 Incorrect U-bolt Torque Spec in Owner Manual and
Service
6245070
4.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
5.
Remove the front tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation.
4926468
6.
7.
Using a digital torque wrench or equivalent set to 200 Nm (147 lb ft), verify all front spring U-bolt nut torques and do
not exceed 162-185 Nm (119-136 lb ft).
•
If the torque values are within the specifications, proceed to step 13.
•
If the torque values exceed the specifications, proceed to step 7.
Support the front axle with an appropriate jack stand.
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Customer Satisfaction Program
N222374570 Incorrect U-bolt Torque Spec in Owner Manual and
Service
4926468
8.
Remove and discard the U-bolt nuts (1) on the U-bolt that were over torqued.
4926469
9.
Remove and replace the U-bolt (1) that was over torqued.
4926468
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Customer Satisfaction Program
N222374570 Incorrect U-bolt Torque Spec in Owner Manual and
Service
10. Install new U-bolt nuts (1) and torque to 162-185 Nm (119-136 lb ft).
11. Repeat steps 8 through 10 on all of the over torqued U-bolts.
12. Remove the front axle support.
13. Install the front tire and wheel assemblies on both sides of the vehicle. Refer to Tire and Wheel Removal and
Installation in SI.
14. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
Dealer Responsibility
All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers' possession
and subject to this program 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, dealertraded, released to auction, used for demonstration, or any other purpose.
All GM Certified Used vehicles currently in the dealers’ inventory within the Certified Pre-Owned Inventory System
(CPOIS) 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 CPOIS system, or once again be used in the CTP 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 April 30, 2025. 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 April 30, 2025, 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
N222374570 Incorrect U-bolt Torque Spec in Owner Manual and
Service
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
N222374570 Incorrect U-bolt Torque Spec in Owner Manual and
Service
April 2023
This notice applies to your vehicle, VIN: ________________________________
Dear General Motors Customer:
We have learned that your 2019-2022 model year Chevrolet Silverado 4500HD/5500HD/6500HD Medium Duty may
have incorrect instructions in the Owner Manual regarding the front spring U-bolt Service torque specification.
Your satisfaction with your Chevrolet Silverado 4500HD/5500HD/6500HD Medium Duty 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 dealers will print and insert the revised Owner Manual page(s) for all vehicles. On certain
vehicles, dealers will verify the front spring u-bolt torque and, if necessary, replace the front spring u-bolt and nuts. This
service will be performed for you at no charge until April 30, 2025. 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 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
Puerto Rico – English
Puerto Rico – Español
Virgin Islands
Number
1-800-222-1020
1-866-467-9700
1-866-467-9700
1-866-467-9700
Text Telephones (TTY)
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 Silverado 4500HD/5500HD/6500HD
Medium Duty vehicle provides you many miles of enjoyable driving.
Neelie O’Connor
Global Executive Director
Customer Experience Operations
Enclosure
N222374570
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