Service Bulletin

Bulletin No.:

22-NA-172

Date:

April, 2023

TECHNICAL
Subject:

Brand:

Trailer Tire Pressure Only Reading Up To 100 PSI (689 kPa), New Parts To Increase To
147 PSI (1013 kPa)

Model:
Silverado 1500

Chevrolet

GMC

Model Year:
from

to

2020

2021

Silverado 1500 LTD
(RPO J21, VIN Digit
5 = W / Y)

2022

2022

Silverado 1500 New
(RPO J22, VIN Digit
5 = A / D)

2022

2022

Silverado
2500HD/3500HD

2020

2022

Sierra 1500

2020

2021

Sierra 1500 Limited
(RPO J21, VIN Digit
5 = 8 / 9)

2022

2022

Sierra 1500 New
(RPO J22, VIN Digit
5 = H / U)

2022

2022

Sierra
2500HD/3500HD

2020

2022

Build Date:
from

to

SOP

Built prior to
December
1, 2021

SOP

Flint built prior to
October 1, 2021

SOP

Built prior to
December
1, 2021

SOP

Flint built prior to
October 1, 2021

Engine:

Transmission:

Involved Region or Country

United States, Canada, Mexico

Additional Options (RPOs)

Equipped with RPOs PTT and U1D

Condition

Some customers may comment on the TTPM (Trailer Tire Pressure Module) and TTPS
(Trailer Tire Pressure Sensors) only reading up to 100 PSI (689 kPa). The new TTPM and
TTPS broadcast a signal up to 147 PSI (1013 kPa) and new calibration for the IPC
(Instrument Panel Cluster) will display a higher signal.

Cause

The cause of the condition may be the original sensors were designed to read up to only
100 PSI (689 kPa).

Copyright 2023 General Motors LLC. All Rights Reserved.

Page 2

April, 2023

Bulletin No.: 22-NA-172

Important: This repair is a customer pay alteration. All work and payment, authorization
must come from the customer.
Replace the TTPM Trailer Tire Pressure Indicator Module Replacement in the Service
Manual and follow the relearn procedure, as well as the four Trailer Tire Pressure
Sensors Trailer Tire Pressure Indicator Sensor Replacement in the Service Manual. Then
reprogram the IPC.
2020 Model Year Vehicles — Replace both the TTPM and sensors then update the IPC
software to V168 or higher.
2021 Model Year Vehicles — Replace both the TTPM and sensors then update the IPC
software to V164 or higher.
2022 Model Year 1500 J21 Trucks — Built prior to December 1, 2021 replace just the
TTPM on vehicles then update the IPC to most current software. Vehicles built after
already have the new TTPM.
2022 Model Year 1500 J22 Trucks — DO NOT need to replace the TTPM or sensors,
ensure the IPC software is V164 or higher.
2022 Heavy Duty Trucks —
• Vehicles built in Flint prior to October 1, 2021 replace both the TTPM and sensors
then update the IPC software to V164 or higher.
• Vehicles built in Oshawa DO NOT need to replace the TTPM or sensors. Ensure the
IPC software is V164 or higher.

Correction

6309767

Example of the High Pressure TTPMs

Bulletin No.: 22-NA-172

April, 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.
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 12 V 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.
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

•

Page 3
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.

Page 4

April, 2023

Bulletin No.: 22-NA-172

Caution: Be sure the VIN selected in the drop down
menu (1) is the same as the vehicle connected (2)
before beginning programming.

5743643

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

5877000

Bulletin No.: 22-NA-172

April, 2023

Page 5

5644477

Important: Techline Connect and TIS2WEB screens
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. No further action is required. Refer to
the Warranty section of the bulletin.
1. Reprogram the Instrument Panel Cluster. Refer to
P16 Instrument Cluster: Programming and Setup in
the Service Manual.

Page 6

April, 2023

Bulletin No.: 22-NA-172

5644478

Note: The screenshots above are 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 Warranty Claim Code on job card for
warranty transaction submission.

Parts Information
No parts are required for this repair.
* We believe this source and their products to be
reliable. There may be additional manufacturers of
such products/materials. General Motors does not
endorse, indicate any preference for, or assume any
responsibility for the products or material from this firm
or for any such items that may be available from other
sources.
Causal
Part
X
X

Version

1

Modified

Released April 05, 2023

Description
MODULE ASMTRLR TIRE
PRESS IND
SENSOR ASMTIRE PRESS IND

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.

Part
Number

Qty
1

85104898
13545366

4

WE SUPPORT VOLUNTARY
TECHNICIAN
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