13-08-116-001

SB-10051721-7063
File in Section:
Service Bulletin
08 - Body and Accessories
Bulletin No.:
13-08-116-001
Date:
February, 2013
TECHNICAL
Subject:
Aftermarket ALDL or DLC Interface Devices Causing Multiple Issues
Models:
2006-2013 GM Passenger Cars and Trucks
Condition
Cause
Customers may comment on various issues with their
vehicle related to high or low speed data bus traffic.
These concerns may be widely varied, but some of the
known issues are listed below.
Note: This bulletin is being issued with a focus on
full-size trucks and full-size vans along with other fleet
vehicles, but may apply to any vehicle.
If nothing else can be identified as the root cause of the
issue, check for a device plugged into the Assembly
Line Diagnostic Link (ALDL) or Data Link Connector
(DLC) for tracking and/or maintenance interval
scheduling. Insurance monitoring devices, along with
other electronic accessories such as aftermarket cruise
control, or police speed checking devices (RADAR or
LIDAR) may cause one or more of the concerns listed
above.
Many of the problems described could be caused by an
open connection on the HSCAN bus. Example: if the
device only makes connection with one CAN +, then it
will cause bus errors and erratic ECU behavior.
These devices may be removed by the customer for
use in another vehicle while theirs is brought in for
service. The intent of this bulletin is to identify a
potential source of concerns that do not have other
diagnostic methods to identify them. The examples
below illustrate some of the devices encountered.
Known Symptoms:
• The radio may not shut off after shutting down
vehicle.
• Bus or LAN traffic may stay active leading to a
discharged vehicle battery.
• Problems reprogramming modules either because
of interference or the device will not allow the bus
to power down.
• ONSTAR® may lose the ability to provide
diagnostic data.
• Various engine and transmission performance
issues with SES light ON.
• Intermittent driveability issues.
• Reduced power message and codes.
• Stabilitrak® message and codes.
• C0561 stored in the EBCM leading to a traction
control issue.
• No high speed LAN communication along with
various communication U-codes.
• Transmission may not shift for one key cycle (TCM
in default mode).
• Erratic gauge readings or flickering displays.
• SES, MIL or CEL light set and numerous DTC
communication codes such as U0100, U0101,
U186B and U1862.
• Diesel power-up devices causing no power in
4WD low range.
• Service Tire Pressure Monitoring (TPM) system
light illuminated.
– Cannot relearn TPM
• Specific to Hybrids:
– Reduced propulsion power message.
– Service high voltage charging system message.
Copyright 2013 General Motors LLC. All Rights Reserved.
Examples:
Device W/Secondary DLC Connector
3260852
Page 2
February, 2013
This device has another DLC connector on it. The rest
of the harness along with the device can be placed out
of sight hidden from the technician, who may not notice
the diagnostic connector is not in the factory location.
Pedal Mounted Aftermarket Cruise Control Interface
Bulletin No.: 13-08-116-001
Aftermarket Cruise Control Switch
3260934
Insurance Monitoring Device
3260861
Aftermarket Cruise Control Interface at ALDL
3260916
3260880
Bulletin No.: 13-08-116-001
February, 2013
Fleet Tracking Device Interface (May Include
Rental and Lease Vehicles)
Page 3
Correction
If the device is available, attempt to duplicate the
condition, then remove the device to determine if the
condition is eliminated. If confirmed, inform the
customer of the issue and that they need to work with
the supplier of the device for further resolution.
If the condition is not eliminated, continue with Service
Information Diagnostics.
Parts Information
There should not be any parts required. If parts appear
to have been damaged by the device or the installation
of the device, this would not be a defect covered under
the New Vehicle Limited Warranty. For more
information on Non-General Motors Parts & Equipment
and Original Equipment Alterations, please refer to
Article 1.2.2.12 of the Service Policies and Procedures
Manual. The repair order must be documented correctly
stating factual information on what alteration or product
was identified on the vehicle.
Warranty Information
3260960
Fleet Tracking Device Plugged Into the DLC
If ALDL interface devices are suspected as the root
cause for a customer's concerns submit a claim using
the Z1111 labor operation to document the concern as
detailed in bulletin “Warranty Administration - Labor
Operation Z1111 - Suspected Tampering or Vehicle
Modifications 09-00-89-016B including submitting the
claim under the appropriate labor operation and
Customer Satisfaction selection in Global Warranty
Management.
If a claim is submitted to GM, follow all existing
guidelines within the Policy and Procedures and Claims
Processing Manual, Administrative Messages, Bulletins
or any other communication format.
Labor Operation
Description
Labor Time
Z1111*
Suspected
Tampering
0.2 hr
*This is a unique labor operation for bulletin use only. It will
not be published in the Labor Time Guide.
3260973
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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