070842006G

File in Section:
Bulletin No.:
Service Bulletin
Date:
08 - Body and Accessories
07-08-42-006G
October, 2012
INFORMATION
Subject:
Information on Available BCM Calibrations to Restore Bulb Outage Detection on
Vehicles Produced by a Second Stage Manufacturer (Upfitter), Turn Signals Flash
Fast after Factory Box Removed
Models:
2007-2013 Chevrolet Silverado
2007-2013 GMC Sierra
This bulletin is being revised to add the 2013 model year. Please discard Corporate Bulletin
Number 07-08-42-006F (Section 08 – Body and Accessories).
The information contained in this bulletin applies to
vehicles that are to be completed by a second stage
manufacturer (upfitter) and may need to have the Body
Control Module (BCM) rear turn signal bulb outage
detection capability changed. All production vehicles
will be manufactured with one of the following BCM rear
turn signal bulb outage detection software options:
1. A standard production vehicle will have BCM
software that checks for two bulbs functioning in
each rear turn signal bulb circuit. If one or more
bulbs are inoperative, the BCM will “fast flash” the
Instrument Panel Cluster (IPC) turn signal indicator
as required by Federal Motor Vehicle Safety
Standard (FMVSS) 108 and Canada Motor Vehicle
Safety Standard (CMVSS) 108.
2. Certain 2500 and 3500 models can be ordered with
a new option (RPO 9U5) where the BCM checks
for one bulb functioning in each rear turn signal
bulb circuit. If the bulb goes inoperative, the BCM
will “fast flash” the Instrument Panel Cluster (IPC)
turn signal indicator as required by Federal Motor
Vehicle Safety Standard (FMVSS) 108 and
Canada Motor Vehicle Safety Standard
(CMVSS) 108.
3. A vehicle built with a pickup box delete or chassis
cab option (RPO ZW9) will be produced with a
BCM program that has no turn signal bulb outage
detection capability (LED compatible). The IPC
turn signal indicator will flash at the same rate no
matter how many turn signal bulbs are inoperative.
In some cases, the upfitter may wish to change the turn
signal bulb outage detection capability so that the turn
signals work correctly with their upfit or to meet certain
requirements. This will require contacting the Techline
Customer Support Center (TCSC) (1-800-828-6860
English or 1-800-503-3222 French) to open a case and
obtain a Vehicle Configuration Index (VCI) number.
Advise the TCSC consultant which turn signal bulb
outage detection capability is needed from the
following list:
1. Factory standard production TWO bulb outage
detection.
2. Optional (RPO 9U5) ONE bulb outage detection.
NOTE: ONLY AVAILABLE ON CERTAIN
2007-2013 MODEL 2500 AND 3500 VEHICLES.
3. NO bulb outage detection (LED compatible).
The BCM can then be reprogrammed with the correct
software.
Warranty Information
For vehicles repaired under warranty, use:
Labor
Operation
N4808
Body Control Module –
Reprogramming with SPS
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.
Copyright 2012 General Motors LLC. All Rights Reserved.
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