PIC6444

Bulletin No.: PIC6444
Published date: 08/18/2021
Preliminary Information
PIC6444 Unable To Use WI-FI - Access Apps & Personalization Features
Models
Brand:
Model:
VIN:
Model Years:
from
Engine:
to
Transmissions:
Cadillac
CT4
2021
All
All
All
All
Cadillac
CT5
2021
All
All
All
All
Cadillac
Escalade
2021
All
All
All
All
Cadillac
Escalade ESV
2021
All
All
All
All
Cadillac
XT4
2021
All
All
All
All
Cadillac
XT5
2021
All
All
All
All
Cadillac
XT6
2021
All
All
All
All
Chevrolet
Blazer
2021
All
All
All
All
Chevrolet
Corvette
2021
All
All
All
All
Chevrolet
Malibu
2021
All
All
All
All
Chevrolet
Silverado
2021
All
All
All
All
Chevrolet
Suburban
2021
All
All
All
All
Chevrolet
Tahoe
2021
All
All
All
All
GMC
Acadia
2021
All
All
All
All
GMC
Sierra
2021
All
All
All
All
GMC
Yukon
2021
All
All
All
All
GMC
Yukon XL
2021
All
All
All
All
Involved Region or Country Middle East
Additional Options (RPO)
Condition
Cause
UE1
Some customers may comment that they are unable to use Wi-Fi, access embedded apps and personalization features in
the radio.
The Emergency (e-Call) function is still operational.
Upon sale of the vehicle, the module is expected to obtain a “Local” pro le and cellular number for use.
The module could lock up during the transition from the factory default “Bootstrap” pro le to “Local” pro le.
In rare instances the module is unable to recover nor revert to the “Bootstrap” pro le.
An over the air (OTA) x is being released through the local cellular network.
If the OTA update is unsuccessful due to the module already being locked up, then this service bulletin will need to be
applied to remedy the customer concerns.
This condition may be caused by a software anomaly with the eSIM operating system.
Correction:
Replace the Communication Interface Module / Telematic Control Module.
Service Procedure
1. Press the OnStar blue button to request the OnStar advisor con rm the SIM pro le swap status.
If the SIM status is ‘Local’ pro le then stop, this bulletin does not apply. Refer to SI for diagnosis of the customer concern.
If the SIM status is ‘Bootstrap’ pro le proceed to step 2.
Note: The component name of the OnStar module varies by vehicle model. It is called either a Communication Interface Module or Telematic Control
Module.
Replace the Communication Interface Module / Telematic Control Module. Refer to Communication Interface Module Replacement or Telematic Control
Module Replacement in SI.
Warranty Information
For vehicles repaired under the Bumper-to-Bumper coverage, use the following labor operation. Reference the Applicable Warranties section of
Investigate Vehicle History (IVH) for coverage information.
Labor Operation
Labor Time
Description
Communication Interface/Telematic Control Module Replacement
Malibu
Escalade, XT4, Silverado, Suburban, Tahoe, Sierra , Yukon,
0.4
0.5
XT5, Acadia
0.6
0.8
1.5
2.0
3487368
CT4, CT5, Blazer
Corvette
XT6
*This is a unique Labor Operation for Bulletin use only.
Version History
Version
Modi ed
1
08/18/2021 - Created on.
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