GM Bulletin No.: 14487
Date: September 2014

Service Bulletin

SERVICE UPDATE
SUBJECT:

Service Update for Inventory and Customer Vehicles
Poor Ride Quality in Tour/Eco Mode
Expires with Base Warranty

MODELS:

2015 Cadillac ATS
Equipped with 2.0L/2.5L Engine (LTG/LCV)

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 Chassis Control Module (CCM) on
certain 2015 model year Cadillac ATS vehicles equipped with a 2.0L or 2.5L engine (LTG/LCV).
The switchable engine mount calibration currently in these vehicles is not the intended calibration
for the "Tour/ECO" vehicle modes. Operating the vehicle in the "Tour/ECO" mode could result in
a poor ride quality (shake) on rough roads. This could also result in less life to the engine mounts
and subsequent fluid leakage from the mounts.
This service procedure should be completed as soon as possible on involved vehicles
currently in dealer inventory and customer vehicles that return to the dealer for any type
of service during the New Vehicle Limited Warranty coverage period.
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.
Additionally, a list of involved vehicles currently in dealer inventory is available on the “Service
Update Bulletin Information” link under the “Service” tab in GM GlobalConnect (US) or attached
to the GlobalConnect message (Canada) used to release this bulletin. 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.
Copyright 2014 General Motors. All Rights Reserved.

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September 2014

Bulletin No.: 14487

PART INFORMATION
No parts are required.
SERVICE PROCEDURE
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.

1. Install EL-49642 SPS Programming Support Tool.
2. Access the Service Programming System (SPS) and follow the on-screen instructions.
3. On the SPS Supported Controllers screen, select K38 Chassis Control Module -Programming and follow the on-screen instructions.
4. At the end of programming, choose the “Clear All DTCs” function on the SPS screen.

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September 2014

Bulletin No.: 14487

WARRANTY TRANSACTION INFORMATION
Submit a transaction using the table below. All transactions should be submitted as a ZFAT
transaction type, unless noted otherwise.
Labor
Code
9100860

Description
Reprogram CCM with SPS

Labor
Time
0.3

DEALER PROGRAM 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.

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.

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