17NA345

Bulletin No.:
Service Bulletin
Date:
17-NA-345
August, 2021
TECHNICAL
Subject:
Steering Jerks, Kicks, Whips or Locks Up or Stiff Feel Effort in Cold Temperatures
Brand:
Model:
Cadillac
Chevrolet
Model Year:
Engine:
Transmission:
All
All
All
All
All
All
2018
All
All
2017
All
All
from
to
Escalade Models
2016
2017
Suburban
Tahoe Models
2016
2017
Chevrolet
Silverado (Light Duty)
2016
2018
GMC
Sierra (Light Duty)
2016
GMC
Yukon Models
2016
VIN:
from
to
See Break Points Chart
Below
Break Points Based on Build Location
Location
From
To
Arlington
SOP
1GYS4DKJ3JR100207
Flint
SOP
1GCUKREC0JF108264
Ft. Wayne
SOP
1GCNKNEC1JZ134433
Silao
SOP
3GTU2NECXJG143448
Involved Region or Country
North America and Export Regions
Important: For 2014 Vehicles please check VIN status per Safety recall 17276. Execute
denoted action if VIN status is “open”.
Important: For 2015 Vehicles please check VIN status per Safety recall 18289. Execute
denoted action if VIN status is “open”.
Condition
Some customers may comment on a temporary loss of electric power steering (EPS)
assist followed by a sudden return of EPS assist, particularly during low-speed turning
maneuvers. The loss and sudden return of EPS assist typically happens within a 1
second period and is caused by an electrical/software issue.
Cause
This may be due to a sudden loss of voltage to the EPS system, the EPS turns off and
then back on as the voltage returns when the EPS load is removed.
Copyright 2021 General Motors LLC. All Rights Reserved.
Page 2
August, 2021
Bulletin No.: 17-NA-345
To prevent the sudden loss of assist, a revised EPS module software has been
developed to reduce the severity of the toggling event. Dealers will reprogram the EPS
module software.
Note: For vehicles that exhibit this condition or any of the following additional conditions,
please refer to latest version of #18-NA-161: Steering Jerks Or Kicks Back / Reduced
Power Steering Assist / Engine Stall / No Start / Service Stabilitrak / IPC / Radio / HVAC
Goes Blank Various DTCs:
Correction
•
•
•
•
•
•
•
•
•
•
•
Reduced or loss of power steering assist
Steering wheel jerks or kicks back when turning
Service Stabilitrak message with warning chime
Engine stall
IPC going blank or inoperative
Radio/ICS going blank
HVAC going blank
Hood ajar message and/or dome lamps flash when shifting into reverse
Alarm sounds when locking doors or door locks cycling
Wipers continue to run for a short time after turning off and then stop/park in the
incorrect location
Any of the following DTCs: B1325, B124B, B124C, B127B, B127E, C0544, C0710,
C0800, P0513, U0020, U0073, U0077, U0078, U0100, U0101, U0102, U0121,
U0126, U0131, U0140, U0155, U0164, U0415, U0422, U0428, U0452, U1509,
U150F and/or U15E1
Service Procedure
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
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.: 17-NA-345
August, 2021
Page 3
5743643
Important: If the vehicle VIN DOES NOT match, the
message below will be shown
5877000
Page 4
August, 2021
Bulletin No.: 17-NA-345
5644477
5431207
Bulletin No.: 17-NA-345
August, 2021
Page 5
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 Power Steering Control Module.
Refer to Power Steering Control Module
Programming and Setup in SI.
5644478
Page 6
August, 2021
Bulletin No.: 17-NA-345
5431209
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 SPS Warranty Claim Code (WCC) screen shown
above on the job card. Refer to callout 1 above for the
location of the WCC on the SPS screen
2. Record SPS Warranty Claim Code on job card for
warranty transaction submission.
Parts Information
No parts are needed for this condition.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
2810625
Power Steering Control Module Reprogramming with SPS
Use Published Labor
Operation Time
Version
3
Modified
Released November 03,2017
Revised May 29, 2018 – Revised to update information under the Correction.
Revised August 02, 2021 — Updated Title, Added Important Statements within Condition,
removed MY2015 as all MY 2015 vehicles are covered per Safety recall 18289.
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.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION