Bulletin No.:

Service Bulletin

Date:

22-NA-235
December, 2023

TECHNICAL
Subject:

Brand:

Wireless Charging is Intermittent When Using iPhone and Samsung Phones at Offset
Positions
Model:

Model Year:
from

VIN:

Engine:

Transmission:

—

—

—

—

—

—

—

—

—

—

—

to

from

to

2023

—

CT4
CT5
Cadillac

Escalade

2022

Escalade
ESV
LYRIQ

Chevrolet

Colorado

2022

2022

Corvette

2022

2023

Silverado
1500

2023

Suburban
Tahoe

GMC

2023

2023
2022

Canyon

2022

2022

HUMMER
EV

2022

2023

Sierra 1500

2023

Yukon
Yukon XL

2022

2023

Involved Region or Country

North America, Brazil, Chile, Colombia, Guatemala, Peru, Europe, Israel, Middle East,
Egypt, Uzbekistan, China, Japan, Vietnam, Cadilllac Korea (South Korea), GM Korea
Company, Australia/New Zealand

Additional Options (RPOs)

Equipped with CHARGER INDUCTIVE PORTABLE WIRELESS DEVICE (RPO K4C)

Condition

Some customers may comment that when attempting to charge their phone, they
experience an intermittent charging when the phone is placed on the charger.

Cause

The cause of the condition may be due to power limits within the wireless charging
module (WCM) software and the requirements for iPhone and Samsung Phone Fast
Charging.

Correction

A software fix can be flashed to the Wireless Charging Module to improve the charging
performance.
DO NOT flash new Software on this part number - 13537143

Copyright 2023 General Motors LLC. All Rights Reserved.

Page 2

December, 2023

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.
Important: This technical service bulletin (TSB) can
only be completed by certified repair facilities who have
met all specific training, tool and equipment
requirements pertaining to the vehicle Brand and Model
serviced. Repairs must be performed by a technician
who has successfully completed the required training.
Caution: Before downloading the update files, be sure
the computer is connected to the internet through a
network cable (hardwired). DO NOT DOWNLOAD or
install the files wirelessly. If there is an interruption
during programming, programming failure or control
module damage may occur.
• Ensure the programming tool is equipped with the
latest software and is securely connected to the
data link connector. If there is an interruption
during programming, programming failure or
control module damage may occur.
• Stable battery voltage is critical during
programming. Any fluctuation, spiking, over
voltage or loss of voltage will interrupt
programming. Install a GM Authorized
Programming Support Tool to maintain system
voltage. Refer to www.gmdesolutions.com for
further information. If not available, connect a fully
charged 12V jumper or booster pack disconnected
from the AC voltage supply. DO NOT connect a
battery charger.
• Follow the on-screen prompts regarding ignition
power mode, but ensure that anything that drains
excessive power (exterior lights, HVAC blower
motor, etc) is off.
• Clear DTCs after programming is complete.
Clearing powertrain DTCs will set the Inspection/
Maintenance (I/M) system status indicators to NO.

Bulletin No.: 22-NA-235

Important: The service technician always needs to
verify that the VIN displayed in the TLC left side drop
down menu and the top center window match the VIN
plate of the vehicle to be programmed prior to using
Service Programming System 2 (SPS2) for
programming or reprogramming a module.
• For the TLC application, service technicians need
to always ensure that the power mode (ignition) is
“ON” before reading the VIN from the vehicle’s
VIN master module and that they do not select a
VIN that is already in the TLC application memory
from a previous vehicle.
• If the VIN that shows up in the TLC top center
window after correctly reading the VIN from the
vehicle does not match the VIN plate of the
vehicle, manually type in the VIN characters from
the vehicle VIN plate into the TLC top center
window and use these for programming or
reprogramming the subject module with the
correct vehicle VIN and software and/or
calibrations.
• The Engine Control Module (ECM) is the master
module (for VIP vehicles) that TLC reads to
determine the VIN of the vehicle. If the VIN read
from the vehicle by TLC does not match the VIN
plate of the vehicle, the ECM also needs to be
reprogrammed with the correct VIN, software and
calibrations that match the vehicle’s VIN plate.
• The Body Control Module (BCM) is the master
module (for GEM vehicles) that TLC reads to
determine the VIN of the vehicle. If the VIN read
from the vehicle by TLC does not match the VIN
plate of the vehicle, the BCM also needs to be
reprogrammed with the correct VIN, software and
calibrations that match the vehicle’s VIN plate.
Caution: Be sure the VIN selected in the drop down
menu (1) is the same as the vehicle connected (2)
before beginning programming.

Bulletin No.: 22-NA-235

December, 2023

Page 3

5743643

Important: If the vehicle VIN DOES NOT match, the
message below will be shown.

5877000

Page 4

December, 2023

Bulletin No.: 22-NA-235

5644477

Important: Techline Connect screen shown above.
Important: If the same calibration/software warning is
noted on the TLC or SPS Summary screen, select OK
and follow screen instructions. After a successful
programming event, the WCC is located in the Service
Programming System dialogue box of the SPS
Summary screen. Document the WCC on the job card.
No further action is required. Refer to the Warranty
Information section of this bulletin.
1. Reprogram the Wireless Charging Module.

Bulletin No.: 22-NA-235

December, 2023

Page 5

5644478

Note: The screenshot above is an example of module
programming and may not be indicative of the specific
module that is being programmed. Module selection
and VIN information have been blacked out.
Important: To avoid warranty transaction rejections,
you MUST record the warranty claim code provided on
the Warranty Claim Code (WCC) screen shown above
on the job card. Refer to callout 1 above for the location
of the WCC on the screen.
2. Record the Warranty Claim Code on the job card
for warranty transaction submission.

Page 6

December, 2023

Bulletin No.: 22-NA-235

Warranty Information
For vehicles repaired under the Bumper-to-Bumper
coverage (Canada Base Warranty coverage), use the
following labor operation. Reference the Applicable
Warranties section of Investigate Vehicle History (IVH)
for coverage information:
Labor Operation

Description

Labor Time

2889078*

Wireless Charging Is Intermittent When Using iPhone and
Samsung Phones At Offset Positions

0.3 hr

*This is a unique Labor Operation for bulletin use only.
Important: To avoid warranty transaction rejections, carefully read and follow the instructions below:

6125814

•
•

The Warranty Claim Code must be accurately entered in the “Warranty Claim Code” field of the transaction.
When more than one Warranty Claim Code is generated for a programming event, it is required to document all Warranty
Claim Codes in the “Correction” field on the job card. Dealers must also enter one of the codes in the “Warranty Claim Code”
field of the transaction, otherwise the transaction will reject. It is best practice to enter the FINAL code provided by SPS2.

Bulletin No.: 22-NA-235

December, 2023

Page 7

Warranty Claim Code Information Retrieval

6125774

If the Warranty Claim Code was not recorded on the
Job Card, the code can be retrieved in the SPS2
system as follows:
1. Open TLC on the computer used to program the
vehicle.
2. Select and start SPS2.
3. Select Settings (1).
4. Select the Warranty Claim Code tab (2).

The VIN, Warranty Claim Code and Date/Time will be
listed on a roster of recent programming events. If the
code is retrievable, dealers should resubmit the
transaction making sure to include the code in the SPS
Warranty Claim Code field.

Page 8

December, 2023

Bulletin No.: 22-NA-235

Version

7

Modified

Released November 18, 2022
Revised December 06, 2022 – Added Important statement at start of Service Procedure,
corrected programming step 1 and clarified Description information for Part Number
13555523.
Revised February 07, 2023 – Added software Part Number column to Parts Information
table.
Revised March 24, 2023 – Added iPhone to Subject, Cause, Parts Information, Warranty
Information and removed Part Number column, updated Description column in Parts
Information table.
Revised April 19, 2023 – Added Part Number to Correction section and removed Parts
Information section.
Revised June 07, 2023 – Removed Cadillac CT6, XT4, XT5, XT6, Chevrolet Blazer, Bolt
EV, Bolt EUV, Camaro, 2023 Colorado, Equinox, Express, Malibu, 2022 Silverado 1500,
Silverado 2500HD/3500HD, Traverse, GMC Acadia, 2023 Canyon, Savana, 2022 Sierra
1500, Sierra 2500HD/3500HD, and Terrain.
Revised December 21, 2023 – Removed Chevrolet Trailblazer.

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 equipment, tools, 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 GM dealer for information on whether your vehicle may benefit from the
information.

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