Bulletin No.: 14039A
Date: June 2014

Program Bulletin

CUSTOMER SATISFACTION PROGRAM
SUBJECT:

AWD Off Indicator Activated

MODELS:

2013-2014 Buick Encore
2013-2014 Chevrolet Trax
Equipped with AWD

This bulletin has been revised to include 2013-2014 model year Buick Encore vehicles.
Please discard all copies of bulletin 14039.
CONDITION
Certain 2013-2014 model year (MY) T300 Chevrolet Trax and 2013-2014 MY Buick Encore
vehicles may have a condition in which the current Rear Differential Control Module (RDCM)
calibration may lead, under certain driving conditions, to activate the All Wheel Drive (AWD) off
indicator. The AWD system is disabled until the next ignition cycle.
CORRECTION
Dealers are to reprogram the RDCM with the latest calibration.
VEHICLES INVOLVED
All involved vehicles are identified by Vehicle Identification Number on the Investigate Vehicle
History screen in GM Global Warranty Management system. Dealership service personnel
should always check this site to confirm vehicle involvement prior to beginning any required
inspections and/or repairs. It is important to routinely use this tool to verify eligibility because not
all similar vehicles may be involved regardless of description or option content.
For dealers with involved vehicles, a listing with involved vehicles containing the complete
vehicle identification number, customer name, and address information has been prepared and
will be sent directly to export dealers. Dealers will not have a report available if they have no
involved vehicles currently assigned.
The listing may contain customer names and addresses obtained from Motor Vehicle
Registration Records. The use of such motor vehicle registration data for any purpose other
than follow-up necessary to complete this recall is a violation of law in several
states/provinces/countries. Accordingly, you are urged to limit the use of this report to the
follow-up necessary to complete this recall

Copyright 2014 General Motors. All Rights Reserved .

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June 2014

Bulletin No.: 14039A

PART INFORMATION
No parts are required.
SERVICE PROCEDURE
Do not attempt to order the calibration number from GM Customer Care and Aftersales. The
calibration numbers required for this service procedure are programmed into control modules via
a Multiple Diagnostic Interface (MDI) with the calibration update. When using an MDI for
reprogramming, ensure that it is updated with the latest software version. Use TIS2WEB on or
after 4/10/14 to obtain the calibration. If you cannot access the calibration, call the Techline
Customer Support Center and it will be provided.
For step-by-step programming instructions, please refer to SI and the Techline Information
System (TIS) terminal.
1. Verify that there is a battery charge of 12 to 15 volts. The battery must be able to maintain a
charge during programming. Only use an approved Midtronics® PSC 550 Battery Maintainer
(SPS Programming Support Tool EL-49642) or equivalent to maintain proper battery voltage
during programming.
2. Reprogram the RDCM through TIS2WEB (with MDI).
3. Set up and configuration must be performed after programming the RDCM. Please refer to
Rear Differential Clutch Control Module Programming and Setup in SI.
WARRANTY TRANSACTION INFORMATION
Submit a transaction using the table below. All transactions should be submitted as a ZFAT
transaction type, unless noted otherwise.
Operation Code
9100371

Operation Description
Reprogram RDCM Only

Labor Time
0.3

CUSTOMER NOTIFICATION – For U.S. and Canada
General Motors will notify customers of this program on their vehicle (see copy of customer letter
included with this bulletin).
CUSTOMER NOTIFICATION – For Export
Letters will be sent to known owners of record located within areas covered by the US National
Traffic and Motor Vehicle Safety Act. For owners outside these areas, dealers should notify
customers using the attached sample letter.
DEALER PROGRAM RESPONSIBILITY
All unsold new vehicles in dealers' possession and subject to this program must be held and
inspected/repaired per the service procedure of this program bulletin before customers take
possession of these vehicles.

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June 2014

Bulletin No.: 14039A

Dealers are to service all vehicles subject to this program at no charge to customers, regardless
of mileage, age of vehicle, or ownership, from this time forward.
Customers who have recently purchased vehicles sold from your vehicle inventory, and for
which there is no customer information indicated on the involved vehicle listing, are to be
contacted by the dealer. Arrangements are to be made to make the required correction
according to the instructions contained in this bulletin. A copy of the customer letter is provided
in this bulletin for your use in contacting customers. Program follow-up cards should not be
used for this purpose, since the customer may not as yet have received the notification letter.
In summary, whenever a vehicle subject to this program enters your vehicle inventory, or is in
your facility for service in the future, you must take the steps necessary to be sure the program
correction has been made before selling or releasing the vehicle.

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June 2014

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
tools, equipment, 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 dealer for information on whether your vehicle may benefit from the
information.

Bulletin No.: 14039A
We Support
Voluntary Technician
Certification

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June 2014

Bulletin No.: 14039A

Buick Customer Notification Letter
June 2014
Dear General Motors Customer:
We have learned that your 2013-2014 model year Buick Encore may have a condition in which
the current Rear Differential Control Module (RDCM) calibration may lead, under certain driving
conditions, activate the All Wheel Drive (AWD) OFF indicator. The AWD system is disabled until
the next ignition cycle. If this occurs, there may be low vehicle driving performance caused by
deactivating the AWD system.
Your satisfaction with your 2013-2014 model year Buick Encore is very important to us, so we
are announcing a program to prevent this condition or, if it has occurred, to fix it.
What We Will Do: Your GM dealer will to reprogram the RDCM with the latest calibration. This
service will be performed for you at no charge.
What You Should Do: To limit any possible inconvenience, we recommend that you contact
your dealer as soon as possible to schedule an appointment for this repair
If you have any questions or concerns that your dealer is unable to resolve, please contact the
appropriate Customer Assistance Center at the number listed below.
Division

Number

Buick
Chevrolet
Guam
Puerto Rico – English
Puerto Rico – Español
Virgin Islands

1-800-521-7300
1-800-222-1020
65-6267-1752
1-800-496-9992
1-800-496-9993
1-800-496-9994

Text Telephones
(TTY)
1-800-832-8425
1-800-833-2438

We sincerely regret any inconvenience or concern that this situation may cause you. We want
you to know that we will do our best, throughout your ownership experience, to ensure that your
GM vehicle provides you many miles of enjoyable driving.
Jim Moloney
General Director,
Customer and Relationship Services
GM Recall Number: 14039A

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June 2014

Bulletin No.: 14039A

Chevrolet Customer Notification Letter

DD MM 2014
Dear Chevrolet Owner,
We would like to inform you of our decision to implement a customer satisfaction program for
certain 2013-2014 model year Chevrolet Trax vehicles equipped with All Wheel Drive (AWD)
system. The AWD OFF indicator may be activated occasionally in the subject vehicles due to
improper Rear Differential Control Module (RDCM) software. If this occurs, there may be low
vehicle driving performance caused by deactivating the AWD system.
According to our records, you own a vehicle subject to this customer satisfaction program. We
request that you visit your nearest dealer or authorized service center to have your vehicle
inspected. Your dealer or authorized service center will update the RDCM software free of
charge.
Please contact your dealer or authorized service center to schedule an appointment for this
campaign. Service instructions have been already sent to your dealer or authorized service
center and this service can be completed in less than 30 minutes for RDCM software update.
If you have any questions or concerns, please feel free to contact your dealer or Customer
Relations Department at ------------------------------------------.
We apologize for inconvenience.
Sincerely,
[Put your company name here]

GM Recall Number: 14039A