15-NA-013

File in Section:
Bulletin No.:
Service Bulletin
Date:
15-NA-013
October, 2015
TECHNICAL
Subject:
Exterior Lighting Inoperative - Incorrect Upfitter BCM Connections
Attention: This Bulletin also applies to any models that may be Export vehicles.
Brand:
Model:
Chevrolet,
GMC
Express,
Savana
Model Year:
VIN:
from
to
from
2008
2016
N/A
to
N/A
Engine:
All
Transmission:
All
Condition
Exterior lighting functions inoperative, such as high/low beam headlamps, hazard lamps,
park lamps and stop lamps.
Cause
Monitoring connections incorrectly installed by upfitter.
Correction
If monitoring of park brake or door open signals, this
must be accomplished by use of a passive serial data
monitoring device or by installation of isolation relay.
Correct the monitoring condition by installing relays or a
passive serial data monitoring module.
Replace the BCM.
Refer to latest version of Bulletin Number
08-08-45-004: Installation of Electrical Aftermarket
Accessories-Battery, Ignition and Ground Feeds-Do
Not Splice into Wiring Harness (Install Diode to
Solenoid/Relay to Suppress Voltage Spikes) in SI.
If the vehicle develops the above stated condition,
return the vehicle to the upfitter to have monitoring
systems removed (only if safe to drive). Do not drive the
vehicle if stop lamps or turn signals are inoperative.
Make transportation arrangements.
Refer to Bulletin 128 at GM Upfitter Integration website
https://www.gmupfitter.com/pages/
technical-bulletins. Click on “Show all Bulletins.”
4277033
Note: With this modification, the BCM input (1134
wire) will be switched by the relay contacts such that no
risk is presented to the BCM. The actual park brake
switch will provide a signal that can be easily monitored
or used to close a (small) relay.
Copyright 2015 General Motors LLC. All Rights Reserved.
Page 2
October, 2015
Bulletin No.: 15-NA-013
Parts Information
Description
Part Number
Body Control Module
22915542
Warranty Information
The removal of the monitoring systems and
replacement of the BCM will not be covered under the
vehicle warranty. This will be at the customer’s
expense.
Version
1
Modified
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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