GM Bulletin No.: 15582
Date: October 2015

Service Bulletin
SERVICE UPDATE
SUBJECT:

Service Update for Inventory and Customer Vehicles
Unwanted Brake Lamp Activation
Expires with Base Warranty

MODELS:

2014-2015 Cadillac ELR
2014-2015 Chevrolet Spark EV

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 on certain 2014-2015 model
year Cadillac ELR and 2014-2015 Chevrolet Spark EV vehicles. These vehicles may illuminate
the brake lamps for 1 second when the vehicle is decelerating up a 16% grade, but with accelerator
pedal input.
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 can be found in GlobalConnect,
under Departments, Service, Field Action Inventory Reports (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.
PART INFORMATION
No parts are required for this repair.

Copyright 2015 General Motors. All Rights Reserved.

Page 2

October 2015

Bulletin No.: 15582

SERVICE PROCEDURE
Note:


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 ECU is not properly configured with the correct calibration software, the
ECU 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 ECU damage may occur.



Stable battery voltage is critical during programming. Any fluctuation, spiking, over
voltage or loss of voltage will interrupt programming. 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.

Reprogram the Electronic Brake Control Module (EBCM). Refer to Electronic Brake 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.
Labor
Code
9101768

Description
Electronic Brake Control Module Reprogramming 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.

We Support
Voluntary Technician
Certification

GM CUSTOMER CARE AND AFTERSALES
DCS3805
URGENT - DISTRIBUTE IMMEDIATELY
Date:

October 14, 2015

Subject:

15582 – Service Update Bulletin
Unwanted Brake Lamp Activation

Models:

2014-2015 Cadillac ELR
2014-2015 Chevrolet Spark EV

To:

All Cadillac and Chevrolet Dealers

Attention: General Manager, Service Advisor, Service Manager, Parts and
Service Director, Parts Manager, New or Used Vehicle Sales
Manager, and Warranty Administrator

General Motors is releasing Service Update Bulletin 15582 today. The total
number of U.S. vehicles involved is approximately 6303. Please see the
attached bulletin for details.

Global Warranty Management (GWM)
The “Investigate Vehicle History” (IVH) screen will be updated October 15, 2015.
A list of involved vehicles in dealer inventory is attached to this message.

GM CUSTOMER CARE AND AFTERSALES