Loss of Sirius XM Audio Until XM Channel Change – 2020 Buick Cadillac Chevrolet GMC

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Service Bulletin Bulletin No.: 20-NA-199
Date: December, 2020
TECHNICAL
Subject: Radio Software Version U150 Update
This bulletin replaces PIT5737B and PIT5754. Please discard all previous versions of PIT5737
and PIT5754.
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Buick
Enclave
2020 2020 — —
— —
Encore GX
Verano
Cadillac
CT6 (China Only)
2020 2020 — —
XT4
XT5
XT6
Chevrolet
Blazer
2020 2020
— —
Camaro
Cruze
Silverado 1500
Silverado 2500HD/
3500HD
Traverse 2020 2020
GMC
Acadia
2020 2020 — —
Sierra 1500
Sierra 2500HD/
3500HD
Page 2 December, 2020 Bulletin No.: 20-NA-199
Involved Region or Country
North America, Europe, Russia, Middle East, Israel, Palestine, Brazil, Chile, Colombia,
Ecuador, Paraguay, Peru, Uruguay, Japan, Cadillac Korea (South Korea), GM Korea
Company, China, Thailand
Additional Options (RPOs) Equipped with Infotainment System RPOs IOS, IOT or IOU
Condition
Some customers may comment on software issues. A continuous improvement software
update is being released with updates made on the following areas: Bluetooth, Projection
(Android Auto/Apple CarPlay), Sirius XM, Display, Instrument Cluster/Driver Information
Center (DIC)/Heads Up Display (HUD), and general system improvements. Most notable
improvements include:
• Bluetooth:
• Phone contacts may not fully download – This condition may vary with each drive
cycle, or each time Bluetooth reconnects. Contacts may be missing, voice
recognition (VR) may respond that it cannot find the contact or may indicate that
no phone is connected even though the display shows a connection is present.
• When using Android Auto, the Bluetooth may not reconnect automatically.
• Sirius XM, Digital (DAB) Radio:
• Sirius XM displays XM Loading, or Acquiring Signal.
• Certain vehicles built with a radio that supports Sirius XM (SXM) new 360L
experience which includes both satellite (SAT) and internet (IP) channels may
briefly play SXM audio for up to 3 seconds then lose SXM audio. This condition
may happen at startup or when switching from another audio source to SXM.
Sirius XM audio can be restored by switching to any other SXM channel and will
remain functional for the remainder of the drive cycle.
• Display:
• Radio and display inoperative after a remote start event. An excessive parasitic
load may cause a dead battery after this condition occurs (Camera and chimes still
function during this condition.)
• Radio freezes when there are 10 paired devices in Bluetooth menu. Pressing
Home recovers this condition.
• Push to Talk (PTT) screen displays at startup and self recovers
• Display freezes (Encore GX only)
• Part of text is truncated in Running Applications page (Korea only)
• Instrument Cluster, DIC, HUD:
• Intermittently when placing a Bluetooth call, the HUD may show the call still active
after the call has ended (Encore GX only)
• Korean text lines are too close to read the info on HUD (Encore GX only)
• Song list in DIC may be blank when searching
• Service tech may experience Instrument Cluster USB update fails.
• System:
• The FM Browse feature only lists the most recent FM station (Non-HD Radios
[U2L or U2M] only)
• Radio stuck in Valet mode. Unable to unlock with correct password/PIN
• Delayed Door Lock menu displays incorrectly when Anti-Lockout setting is
enabled, allowing two options to be selected
• Performance Data Recorder (PDR) displays status bar and black screen only
when in Park after rejecting an incoming call (Camaro only)
• Automatic Time Zone setting is greyed out
• Unable to list or play AVI/MP3 files
• Over the Air (OTA) update popup does not expire until Accepted or Declined
• OnStar Location Services switch is off and displays Location unblocked popup in
Turn by Turn (TBT) when selecting Yes.
• RDS Traffic Alerts may not play or display correctly while using Android Auto or
Apple CarPlay.
Cause The cause of the condition may be software anomalies.
Correction
A new radio software update, version U150, is being released for vehicles equipped with
Infotainment system RPO IOS, IOT or IOU, in addition to providing general robustness
and stability enhancements. This update includes all enhancements from previous
software version releases.
This update can occur remotely through in-vehicle prompts from the radio display.
However, some customers may decline the vehicle update, or the update may be
unsuccessful. Along with the vehicles mentioned above, vehicles in unconnected
markets, and fleet customers may need the dealer to reprogram the radio with the new
software package.
Bulletin No.: 20-NA-199 December, 2020 Page 3
Service Procedure
Important: Some technicians are reporting that the
radio remains on v148 after the radio displays the
software update completed successfully. It is important
to ensure that the technician is inspecting the Build
Number and not other rows of information on the same
screen. This requires the user to locate the Build
Number, and then select the Information icon (circled
lower-case i) to see the full software version file name.
In these radios, the build number could be W124E after
installing U150. This W124E is NOT the software
version and is not unique to the U150 software release.
Important: After pressing the information icon, review
the full software version file name. In the middle of this
long file name you see the U150.3.
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Important: If the remote vehicle update has been
downloaded or installed, DO NOT install the update via
USB. DO NOT attempt to complete the programming
event without reading Determining Where to Start –
Checking for Update Status first to avoid programming
failures or module lockup conditions.
Tip: Tripping the door latch to closed status with the
door open will allow exit of the vehicle during the
programming process. Do NOT open the latch until
programming is complete.
The update procedure in this bulletin includes the
following four sections:
• Determining Where to Start – Checking for Update
Status
• Update Procedure Using Remote Vehicle Update
• Update Procedure Using TIS2WEB (USB
Download)
• Troubleshooting
Important: DO NOT attempt to complete the
programming event without reading Determining Where
to Start – Checking for Update Status first to avoid
programming failures or module lockup conditions.
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Determining Where to Start – Checking for
Update Status
The process used for this update is dependent on the
status of the software on the module and if the module
already has a remote install package downloaded. To
verify if an update package is already on the vehicle,
open “Settings” and then scroll to “Updates” on the
radio screen.
• If an update is shown under the “Updates” screen,
proceed to the Update Procedure Using Remote
Vehicle Update section of this document.
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• If no update is shown (see “No Updates Available”
image in next section), go to the “About” screen
and verify the build number (i.e., U145, U146,
etc.). If the build number is less than U150.3,
proceed with the software update following the
Update Procedure Using TIS2WEB (USB
Download) section of this document.
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Caution: If Vehicle Update screen shows
“Infotainment System Update” (such as the screen
above), do not use TIS2WEB or insert a USB stick. Use
of the USB stick when the Remote Update has already
been downloaded, installed, or paused during
installation could result in program failures or module
lockup condition. The update should be completed
using the Remote Vehicle Update procedure, following
prompts on the infotainment screen. Refer to Update
Procedure Using Remote Vehicle Update after reading
the remaining information in this section if the Remote
Update has already been downloaded to the radio.
• If the remote vehicle update CANNOT be
completed, the radio must be updated through
SPS via USB. Refer to Update Procedure Using
TIS2WEB (USB Download) in this bulletin.
Bulletin No.: 20-NA-199 December, 2020 Page 7
Update Procedure Using Remote Vehicle
Update
1. Verify if there is a remote package on the system
and check to see which of the below pop ups show.
• If the remote vehicle update has not been
downloaded, select “Start Download,” wait for
the download to complete and then follow the
prompts to complete installation.
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• If no “Start Download” or “Install Now” pop up is
displayed, navigate to “Settings” -> “Updates.” If
there is a remote package on the system, it will
display “Install Now” Or “Start Download.” If the
screen below is shown, then there is no remote
update package on the system. Navigate to
Settings -> About to verify the software version.
If the build number is not U150 or greater,
update via USB.
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Important: During installation, the vehicle will be
disabled and cannot be driven. Features like door
locks, windows and chimes may not work. If you leave
the vehicle, DO NOT lock occupants inside.
Note: Download may pause due to cellular connection
speed. If the download pauses, click resume to
continue. If the download takes longer than 30 minutes,
see the Troubleshooting section below.
2. Once the remote vehicle update has completed,
verify there are no additional updates. Select
“Settings”, scroll down and select “Updates.” If no
updates are available, verify software build is at
U150 or greater in “Settings” -> About screen. If
confirmed, no further action is required.
Update Procedure Using TIS2WEB (USB
Download)
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.
Note: Carefully read and follow the instructions below.
• 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.
• Turn OFF or disable systems that may put a load
on the vehicles battery such as; interior lights,
exterior lights (including daytime running lights),
HVAC, etc.
• Clear DTCs after programming is complete.
Clearing powertrain DTCs will set the Inspection/
Maintenance (I/M) system status indicators to NO.
Bulletin No.: 20-NA-199 December, 2020 Page 9
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5431207
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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 Information section of this bulletin.
Important: When programming a module in GM’s new
Vehicle Intelligence Platform, or VIP, the power mode
(ignition) needs to be off or errors may occur. This
involves the 2020 Chevrolet Corvette, Cadillac CT5 and
CT4, as well as the upcoming full-size Chevrolet, GMC,
Cadillac SUVs and Buick Envision. Serial Data
Message Authentication also needs to have the
ignition off.
Important: Be sure to keep the vehicle doors closed
prior to beginning, and during, the USB programming
event.
Tip: Tripping the door latch to closed status with the
door open will allow exit of the vehicle during the
programming process. Do NOT open the latch until
programming is complete.
1. Start SPS, select Radio – USB File Transfer and
follow the on-screen instructions.
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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 the SPS Warranty Claim Code on the job
card for warranty transaction submission.
3. Insert the USB into the vehicle while in Park. On
the radio screen, select “Settings” —> “Updates” or
select “Learn More” on pop up after USB insertion.
4. Select Install Update.
5. Follow on screen prompts to complete the update.
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Clear DTCs after programming is complete. Clearing
powertrain DTCs will set the Inspection/Maintenance (I/
M) system status indicators to NO.
Bulletin No.: 20-NA-199 December, 2020 Page 13
Troubleshooting
Important: When downloading USB update files, be
sure the computer is connected to the internet through
a network cable (hardwired). DO NOT DOWNLOAD the
files wirelessly.
Important: If having issues with the USB drives, try
using a different brand. The USB drive should be
USB 3.0.
Important: It is normal operation of the Over-the-Air
(OTA) update process for a radio to remain on for 30
seconds after ignition is turned off and retained
accessory power (RAP) has been disabled. The radio
will return to normal power down operations, i.e. off
when RAP is disabled, once the OTA update has been
installed.
Scenario 1: Vehicle conditions are not ideal.
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If the above screen is shown, download the update
through TIS2Web and perform USB update. Upon USB
insertion while vehicle is running, the “Install Now” pop
up will be presented. Ensure the vehicle battery is
being maintained (using EL-49642 or battery
maintainer) while performing this update.
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Scenario 2: Consistently Paused Download
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If the above screen is shown and resuming the
download repeatedly fails, a USB update will need to
be performed. Turn the vehicle on, return to the home
screen, and insert USB stick (see previous section). A
pop up should be shown to “Install Now.” Click “Install
Now”, verify the part number is correct and follow on
screen prompts.
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Scenario 3: Update failed. Return to dealer screen.
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1. If the above screen is shown, download the update
through TIS2Web and insert USB stick into the
radio twice (USB stick is not recognized on first
insertion). A blue progress bar should come on the
screen and update will proceed. If this screen
above is shown when trying to update the radio
through USB, reformat to FAT32 on your PC, and
then try to download the update through TIS2WEB
again.
2. After selecting USB File Transfer, if you are
prompted by TIS2Web to select a software P/N,
then follow the on-screen instruction to attempt to
gather the software P/N from the A11 Radio using
GDS2 scan tool. If GDS2 indicates the radio is not
communicating, go back to TIS2Web, select A11
Radio, and select when radio displays “Update
failed. Return to dealer. ” to complete the USB File
Transfer programming event.
3. If the screen above is shown again, contact
Technical Assistance (TAC) for further assistance.
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
9700005*
Remote Vehicle Update:
TIS2WEB/USB Download
Not Required
0.3 hr
9700021** Radio Module
Reprogramming with
SPS/USB
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:
• Submit as Transaction Type ZREG.
• The SPS 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
SPS/SPS2.
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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 SPS/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 3
Modified Released September 21, 2020
November 09, 2020 – Added additional Export models, updated the Involved Region or
Country section, updated the Service Procedure to clarify how to locate the software
version number and information on keeping doors closed during programming.
December 10, 2020 – Removed the 2021 Chevrolet Trailblazer.

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