18NA051

File in Section:
Bulletin No.:
Service Bulletin
Date:
18-NA-051
February, 2018
TECHNICAL
Subject:
TTY Phone Feature Icon Missing from Radio Display Setting
Brand:
Model:
Cadillac
GMC
Model Year:
VIN:
from
Engine:
Transmission:
from
to
to
ATS
CTS
XTS
2018
2018
All
All
Terrain
2018
2018
All
All
Involved Region or Country
North America
Additional Options (RPOs)
Equipped with Radio Infotainment System RPO IOS, IOU, or IOT
Condition
4889130
Some customers may comment on the TTY phone feature icon missing from the radio
display settings.
The TTY feature helps people who are hearing impaired communicate on the phone. This
feature is calibrated off and these calibrations will enable the menu and allow the driver to
adjust the setting as they want.
Cause
This may be due to a software calibration.
Correction
Update the radio with the latest calibrations available in TIS2WEB.
Copyright 2018 General Motors LLC. All Rights Reserved.
Page 2
February, 2018
Bulletin No.: 18-NA-051
Service Procedure
If you encounter a vehicle with the above concern, SPS
program the radio. Refer to Radio: Programming and
Setup in SI. USB programming is not required.
Parts Information
No parts needed for this condition.
Warranty Information
For vehicles repaired under warranty, use:
Labor
Operation
Description
Labor Time
2810335
Radio Reprogramming
with SPS
Use
Published
Labor
Operation
Time
Version
1
Modified
Released February 19, 2018
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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