21-NA-214

Service Bulletin
Bulletin No.:
21-NA-214
Date:
April, 2022
TECHNICAL
Subject:
Service Engine Soon Lamp Illuminated, Harsh or Delayed Transmission Shifts
Including Slip, Surge, Shudder, Noise, Whine, Growl, Shake and/or Vibration, DTCs
P2002, P2463, P2459, P144E, P0421, P0422, P0106 P20EE, P129F, P16F3, P20FF,
P226D, P249D, P249E, P11CC and / or P11D5 Set Current or in Recent History
Brand:
Model:
Chevrolet
GMC
Model Year:
from
to
Silverado
2500HD/3500HD
2020
2020
Sierra 2
500HD/3500HD
2020
2020
Involved Region or Country
VIN:
from
Engine:
Transmission:
to
L5P
United States, Canada, Middle East, Israel and Palestine
Additional Options (RPOs)
Condition
Some customers may comment on the Service Engine Soon Lamp being illuminated.
They may also comment on multiple transmission issues including harsh or delayed
shifts, slip, surge, shudder, noise, whine, growl, shake and/or vibration. As well as the
exhaust brake not working or that they do not feel it.
Technicians may find DTCs P2002, P2463, P2459, P144E, P0421, P0422, P0106
P20EE, P129F, P16F3, P20FF, P226D, P249D, P249E, P11CC and / or P11D5 set
current or in recent history.
Cause
The cause of the condition may be by a software anomaly. GM Engineering has
developed a field fix for the above conditions.
Correction
Please check for any updates to the TCM. If one is available, program it first. After
checking and/or installing the transmission update, check for an ECM update. If one is
available, install it. If one is not available, refer to SI for normal diagnostics.
If after programming there is a Reduced Power message and/or U0101, it is likely that the
ECM was updated but the TCM was not. Please reprogram the TCM.
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
Copyright 2022 General Motors LLC. All Rights Reserved.
•
•
•
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
Please verify that the radio time and date are set
correctly before inserting USB drive into vehicle
for programming, otherwise an error will result..
Clear DTCs after programming is complete.
Clearing powertrain DTCs will set the Inspection/
Maintenance (I/M) system status indicators to NO.
Page 2
April, 2022
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.
Bulletin No.: 21-NA-214
•
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.
5743643
Bulletin No.: 21-NA-214
April, 2022
Page 3
Important: If the vehicle VIN DOES NOT match, the
message below will be shown
5877000
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 Engine Control Module and
Transmission Control Module. Refer to K20 Engine
Control Module: Programming and Setup in the
Page 4
April, 2022
Bulletin No.: 21-NA-214
Service Manual and K71 Transmission Control
Module: Programming and Setup in the Service
Manual.
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 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.
Bulletin No.: 21-NA-214
April, 2022
Page 5
Warranty Information
For vehicles repaired under the Emission coverage,
use the following labor operation. Reference the
Applicable Warranties section of Investigate Vehicle
History (IVH) for coverage information.
Important: Warranty coverage code E2 applies for this
module programming event. ECM reprogramming is
covered for 8 years/80,000 miles (U.S.) or 8 years/
130,000 km (Canada).
Labor Operation
Description
Labor Time
*2888228
ECM and TCM Reprogramming
0.6 hr
*This is a unique Labor Operation for Bulletin use only.
Important: **To avoid warranty transaction rejections, carefully read and follow the instructions below:
• The Warranty Claim Code must be accurately entered in the “SPS 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 “SPS Warranty Claim
Code” field of the transaction, otherwise the transaction will reject. It is best practice to enter the FINAL code provided
by SPS2.
Warranty Claim Code Information Retrieval
If the SPS Warranty Claim Code was not recorded on
the Job Card, the code can be retrieved in the SPS
system as follows:
1. Open TLC/TIS on the computer used to program
the vehicle.
2. Select and start SPS2.
3. Select Settings.
4. Select the Warranty Claim Code tab.
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.
Version
4
Modified
Released October 21, 2021
Revised January 27, 2022 – Added additional condition to Condition Section and updated
programming procedure under Service Procedure
Revised February 16, 2022 – Added various DTCs to Subject and Condition
Revised April 01, 2022– Removing “sequentially” reprogramming from step 1 of the
Service Procedure and Labor Operation description.
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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