14619

Bulletin No.: 14619
Date: December 2014
Recall Bulletin
SERVICE UPDATE
SUBJECT:
Trailer Sway Control False Activation
MODELS:
2014 Chevrolet Trailblazer
This service update includes vehicles in dealer inventory and customer vehicles that return to
the dealership for any reason. This bulletin will expire at the end of the involved vehicle's New
Vehicle Limited Warranty period
PURPOSE
This bulletin provides a service procedure to reprogram the EBCM (Electronic Brake Control
Module) on certain 2014 model year Chevrolet Trailblazer vehicles. Some customers
experience a trailer sway control false activation. The dealer will reflash the Electronic Brake
control module with a revised calibration at the next service visit.
CORRECTION
Reprogramming Electronic Brake Control Module (EBCM) with the latest calibration file.
VEHICLES INVOLVED
All involved vehicles are identified by VIN in the Global Warranty Management System –
Investigate Vehicle History Application. Dealership technicians 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.
Customer vehicles that return for service, for any reason, and are still covered under the
vehicle's base warranty should also be checked for vehicle eligibility.
PART INFORMATION
No parts are required.
SERVICE PROCEDURE
Electronic Brake Control Module Reprogramming
The calibration numbers required for this service procedure are programmed into control
modules via a Multiple Diagnostic Interface (MDI) and TIS2WEB with the calibration update.
Copyright 2014 General Motors. All Rights Reserved.
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December, 2014
Bulletin No.: 14619
When using a MDI for reprogramming, ensure that it is updated with the latest software
version. Use TIS2WEB on or after 11/17/2012 to obtain the calibration
Note: Carefully read and follow the instructions below.

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. If you cannot
access the calibration, call the Techline Customer Support Center and it will be provided.

DO NOT program a control module unless directed to by a service procedure or a service
bulletin. If the control module is not properly configured with the correct calibration software,
the control module will not control all of the vehicle features properly.

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. When required install the EL-49642 SPS
Programming Support Tool to maintain system voltage. If not available, connect a fully
charged 12 V 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, radio, etc.

During the programming procedure, follow the SPS prompts for the correct ignition switch
position.

Clear DTCs after programming is complete. Clearing powertrain DTCs will set the
Inspection/Maintenance (I/M) system status indicators to NO.
Refer to the appropriate section(s) in eSI for Electronic Brake Control Module Reprogramming.
WARRANTY TRANSACTION INFORMATION
Submit a transaction using the table below. All transactions should be submitted as a ZFAT
transaction type, unless noted otherwise.
Labor
Operation
9100905
Labor Operation Description
Electronic Brake Control Module
Reprogramming with SPS
Labor Time
0.4
DEALER RECALL RESPONSIBILITY
Whenever a vehicle subject to this service update enters your vehicle inventory, or is in your
facility for service in the future, and the vehicle is still covered under the New Vehicle Limited
Warranty, you must take the steps necessary to be sure the service update correction has been
made before selling or releasing the vehicle.
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December, 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.: 14619
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