File in Section:
Bulletin No.:

Service Bulletin

Date:

18-NA-039
February, 2018

TECHNICAL
Subject:

Personalization Selections Intermittently Missing from Comfort and
Convenience Menu

Brand:

Model:

Buick

Model Year:

VIN:
from

to

Engine:

Transmission:

from

to

Envision

2017

2018

All

All

Cadillac

ATS
CTS

2017

2017

All

All

Cadillac

CT6
Escalade
Models

2017

2018

All

All

Chevrolet

Impala
Silverado
Suburban
Tahoe

2017

2018

All

All

GMC

Sierra
Yukon
Models

2018

2018

All

All

Involved Region or Country

North America and NA Export vehicles

Additional Options (RPOs)

Equipped with ONLY with Infotainment System RPO IO5 or IO6

Condition

Some customers may comment that when they enter Radio Settings on the infotainment
display, some of the personalization selections within the Comfort and Convenience
menu are missing at times. The following personalization selections may be missing at
times as a result of this: Auto Memory Recall, Easy Exit Features, Reverse Tilt Mirror,
Auto Fold Mirror, and Safety Alert Seat.
Typically, the concern will start happening as soon as the vehicle is started and it will last
for an entire ignition cycle. However, if the ignition is turned off briefly and back on again
before the radio/tuner has a chance to go to sleep, the selections will typically reappear
again.

Cause

This is a result of a timing issue between the Memory Seat Module and the Radio/Tuner
upon key up.

Correction

If personalization selections are intermittently/randomly missing from the Comfort and
Convenience menu, program the memory seat module with the latest TIS2web
calibrations and re-evaluate the concern.

Service Procedure
If you encounter a vehicle with the above concern,
reprogram the memory seat module. Depending on the
model you are working on, TIS2web may list both a
driver and passenger memory seat module. If this is the
case, select and program the driver’s side memory seat
module. Refer to the Seat Memory Control Module
Programming and Setup procedure in SI for detailed
programming instructions.

Copyright 2018 General Motors LLC. All Rights Reserved.

Note: If personalization selections are ALWAYS
missing within the Comfort and Convenience menu,
never reappear over several short and long key cycles,
and/or there are related DTCs stored, this bulletin does
not apply so normal diagnosis should be followed to
repair the vehicle as necessary.
Note: If personalization selections are not missing
from the Comfort and Convenience menu but they are
missing from other menus such as the Climate and Air
Quality, Collision/Detection Systems, and Lighting
menus, refer to bulletin 17-NA-186.

Page 2

February, 2018

Bulletin No.: 18-NA-039

Note: If personalization selections are missing from
the Comfort and Convenience menu but your model is
not listed in this bulletin, please review the latest
version of PIC6315 to determine if it apples to the
vehicle you are working on.
Note: Memory seat adjustments may not be available
upon delivery or after service so memory locations will
need to be stored if they have never been set when
new, following a battery disconnect, or following
Memory Seat Module replacement/programming.

Parts Information
No parts are needed for this condition.

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

3480748*

Program K40 Memory Seat Module with Personalization Fix

0.3 hr

*This is a unique Labor Operation for Bulletin use only.

Version

1

Modified

Released February 06,2018

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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