N222365730

Service Update
N222365730 Power Tonneau Cover Calibration Loss
Release Date:
Attention:
May 2022
Revision:
00
This service update includes vehicles in dealer inventory and customer vehicles that return to the
dealership for any reason. This bulletin will expire at the end of the involved vehicle’s New Vehicle Limited
Warranty period.
Make
Model
GMC
Hummer EV
Model Year
From
To
LPO
2022
5KM
2022
Description
Accessory Power Tonneau
Cover
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 2022 model year GMC Hummer EV vehicles, equipped with a power tonneau cover, (LPO 5KM),
have a condition where the cover loses the ability to track its location, resulting in partial opens/closes
and stops, requiring recalibrating the cover to return functionality.
Dealers will inspect the electronic control unit, (ECU) for V2.0 sticker, and if necessary, replace units.
Parts
Quantity
1
Part Name
Part No.
85597139
Electronic Control Unit
Due to the small number of vehicles involved, (67), and due to limited initial parts availability, dealers are encouraged not
to order parts for use as shelf stock. Parts should only be ordered when inspection determines that it is necessary to
replace the ECU.
Parts required to complete this recall are to be obtained from General Motors Customer Care and Aftersales (GMCC&A).
Please refer to your “involved vehicles listing” before ordering parts. Order parts on a CSO = Customer Special Order
only. DRO’s may be cancelled. All orders will be reviewed prior to being filled. Parts may have quantity limiters in effect.
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
9106299
9106300
Description
Inspect Only – No Further Action Required
Replace Electronic Control Unit (ECU)
Labor
Time
0.3
0.5
Trans.
Type
Net
Item
ZFAT
N/A
Service Procedure
1.
Open the power tonneau cover.
1.1 If the power tonneau does not operate, recalibrate the top by pressing the open/close buttons together for 10
seconds. Refer to Pickup Box Cover Package Installation, Calibration Procedure section in SI. If the top fails to
calibrate then crawl inside the bed to the front and push in the release lever on the Tonneau motor unit.
(Passenger side of vehicle white color -glow in the dark.) Top can then be opened manually. Once open, pull
the lever back out to re-engage the motor.
Copyright 2022 General Motors. All Rights Reserved.
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Service Update
N222365730 Power Tonneau Cover Calibration Loss
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6051485
2.
Inspect the Rolltrac for firmware version.
2.1 Inspect the underside of the roll top at the tailgate end (1) and the electronic control unit (ECU) (2) for the “ECU
V 2.0” sticker:
2.2 If the electronic control unit (ECU) does not have the stickers as shown, continue to step 3.
2.3 If the electronic control unit (ECU) has the stickers shown, no further action is required.
3.
Replace the electronic control unit (ECU).
3.1 Remove 3- 6MM screws using a 4mm Allen wrench located on the side of the ECU unit.
3.2 Disconnect 4 electrical connectors. 3 on the back end and one on the top with rubber boot. Connectors have a
lock lever on the side to release them.
3.3 Remove the electronic control unit (ECU) and hold for warranty return.
3.4 Install the new electronic control ECU unit by reversing the removal procedure as follows:
•
Connect the 4 electrical connectors. (Match the symbols on the wires to the symbols on the side of the
ECU.)
•
Install three 6mm screws.
•
Verify operation by recalibrating the top. (Holding the Open/Close buttons for 10 seconds until light on motor
cover comes on.)
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Service Update
N222365730 Power Tonneau Cover Calibration Loss
Dealer Responsibility
Whenever a vehicle subject to this service update enters your vehicle inventory or is in your facility for service in the
future, and the vehicle is still covered under the New Vehicle Limited Warranty, you must take the steps necessary to be
sure the service update correction has been made before selling or releasing the vehicle.
All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers' possession
and subject to this bulletin 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 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.
Dealer Reports – For USA
The Inventory tab of the Open Vehicle Report will contain Service Update Bulletin VINs that apply to this field action.
This information is intended to assist dealers with the PROMPT COMPLETION of these vehicles. The Customer InService tab will not contain Service Update Bulletin VIN data because the intent of a Service Update Bulletin is to not
inconvenience a customer with a special trip for service. Service Update Bulletins are to be completed when the
customer is in for a regularly scheduled visit.
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 3
GLOBAL SAFETY FIELD INVESTIGATIONS
DCS6153
URGENT - DISTRIBUTE IMMEDIATELY
Date:
May 4, 2022
Subject: N222365730 - Service Update
Power Tonneau Cover Calibration Loss
Models: 2022 GMC Hummer EV
Equipped with Accessory Power Tonneau Cover (RPO 5KM)
To:
All General Motors Dealers
General Motors is releasing Service Update N222365730 today. The total
number of U.S. vehicles involved is approximately 67. Please see the
attached bulletin for details.
Global Warranty Management (GWM)
The Required Field Action section on the Investigate Vehicle History (IVH) screen will
be updated May 4, 2022. A list of involved vehicles in dealer new inventory is attached
to this message. Please hold all warranty transactions until IVH has been updated.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS