Customer Satisfaction Program
N242468850 Removable Roof Panel Noise
Release Date:
Attention:

August 2024

Revision:

00

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 September 30, 2026.

Make

Model
HUMMER EV Pickup
HUMMER EV SUV

GMC
GMC

Model Year
From
To
2024
2024
2024
2024

RPO

Description

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

On certain 2024 model year GMC HUMMER EV Pickup and SUV vehicles, customers may experience
wind noise and/or a rattling condition originating at the removable roof panels.
Dealers are to adjust the roof I-Bar pocket receiver.

Parts
Quantity
8
As Req

As Req

Part Name
Washer
AC Delco Super Lube Spray (for window seals)

Part No.
11505463
12346241 US
10953474 CA
For Export:
88866022
12371287 US
10953437 CA
For Export:
Material Spec
GMW18322

AC Delco Super Lube Paste (for receiver pockets)

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
9107583

Description
Roof I-Bar Pocket Receiver Adjustment
Add: Flip Rear I-Bar to face Front
Add: Test Drive
Add: Roof Lift Off Panel Adjustment

Labor
Time
0.3
0.5
0.3
ST

Trans.
Type
ZFAT

Net
Item
N/A

Service Procedure
Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws applicable to
the activities it performs under this bulletin, including but not limited to handling, deploying, preparing, classifying,
packaging, marking, labeling, and shipping dangerous goods. In the event of a conflict between the procedures set forth
in this bulletin and the laws that apply to your dealership, you must follow those applicable laws.
1.

Remove all four sky panels from the roof of the vehicle and set them aside in a safe and secure location.

Copyright 2024 General Motors. All Rights Reserved.

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Customer Satisfaction Program
N242468850 Removable Roof Panel Noise

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2.

Remove the four nuts (1) from the front I-Bar.

5832364
Note: Be careful not to damage the weather strip cover around the panel when removing the panel.
3.

Remove the Front I-Bar (1).

4.

Place the I-Bar on a protected secure table with the interior side facing UP.

5.

Remove the two trim panel push-pin retainers and remove the I-Bar panel cover.

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Customer Satisfaction Program
N242468850 Removable Roof Panel Noise

6425255

6425256

6.

Unscrew the I-Bar Pocket receivers from the I-Bar (red arrows).

6425388

Note: If any washers are already present, there is no need to install additional washers to the vehicle.
7.

Place a washer at each of the four bolt holes underneath the pocket receivers.

8.

Reinstall the pocket receivers, torque to 9 N-m (80 Lb-in).

9.

Reattach the trim cover and secure it with the push-pin fasteners.

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Customer Satisfaction Program
N242468850 Removable Roof Panel Noise

6425390

Important: The Center Roof Lift Off Panel is labeled “Front,” ensure that it is properly aligned towards the front of the
vehicle during reinstallation. Also ensure the weather strip is secured and properly sealed.
10. Reinstall the Front I-Bar in the correct orientation.

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Customer Satisfaction Program
N242468850 Removable Roof Panel Noise

6425394

Example of an unseated weather strip. If the weather strip is left unseated as shown it can cause wind noise and
water leaks.

6425395

6425397

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Customer Satisfaction Program
N242468850 Removable Roof Panel Noise
Example of the proper weather strip seal shown above.
11. Use soapy water to clean the weather strips, and then apply a very light application of AC Delco Super Lube Spray
to the weather strips.

6693889

12. Inspect the rear I-bar for proper orientation. Front should be towards the front of the vehicle.
a.

If it is not, refer to Center Roof Lift Off Rear Panel Replacement in SI to remove and replace it in the correct
orientation.

Note: The rear I-Bar does not need to be removed for this portion of the repair.

6430469

13. Remove the rear I-Bar trim panel by pulling down on the panel to disengage the retainers.

6430466

14. Remove both I-Bar pocket receivers.

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Customer Satisfaction Program
N242468850 Removable Roof Panel Noise

6425404

Note: If any washers are already present, there is no need to install additional washers to the vehicle.
15. Place a washer at each of the four bolt holes underneath the pocket receivers.
16. Reinstall the receivers to the I-Bar, torque to 9 N-m (80 lb-in).
17. Reattach the rear I-Bar trim cover.
18. Use soapy water to clean the weather strips and then apply a very light application of AC Delco Super Lube Spray to
the weather strips.

6698995

19. Apply AC Delco Super Lube Paste to the top and bottom of the I-bar receiver pockets. The grease should be applied
to the inner portion as shown, not the outer angled portion.
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Customer Satisfaction Program
N242468850 Removable Roof Panel Noise
20. Reinstall the front and rear sky panels.
21. Test drive the vehicle at a range of speeds and over varying bumps to determine if the sky panels are still exhibiting
any rattling/knocking/wind noise.
a.

If the panels are NOT exhibiting any noise issues after the repair, no further action is required.

b.

If the panels are continuing to exhibit noise issues after the repair, refer to Roof Lift Off Panel Adjustment in SI
and perform the adjustment procedures located there. After completing the procedures from that document, refer
to Front Side Door Window Adjustment and Rear Side Door Window Adjustment 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 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

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Customer Satisfaction Program
N242468850 Removable Roof Panel Noise
September 2024
This notice applies to your vehicle, VIN: ________________________________
Dear General Motors Customer:
We have learned that on your 2024 model year GMC HUMMER EV Pickup or SUV vehicle, you may experience wind
noise and/or a rattling condition originating at the removable roof panels.
Your satisfaction with your HUMMER EV Pickup or SUV 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 adjust the roof I-Bar pocket receiver. 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. When scheduling your appointment, confirm with
the dealer that they are an EV certified dealer.
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
GMC HUMMER EV/SUV
Puerto Rico – English
Puerto Rico – Español
Virgin Islands

Number
1-833-HUMMER-EV
(1-833-486-6373)
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
N242468850

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GENERAL MOTORS
DCS6981
URGENT - DISTRIBUTE IMMEDIATELY
Date:

August 15, 2024

Subject: N242468850 - Customer Satisfaction Program
Removable Roof Panel Noise
Models: 2024 GMC HUMMER EV Pickup
2024 GMC HUMMER EV SUV

General Motors is releasing Customer Satisfaction Program N242468850
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.
The Stock VIN list of vehicles in dealer inventory is attached to this message.
Note: this list is only accurate at the time of report creation and all VINs should
be validated in IVH prior to repair.
END OF MESSAGE