ADVISORY - GM UPFITTER Bulletin 124d (… · 2014 Chevrolet Silverado 1500 2015-2016 Chevrolet...
Transcript of ADVISORY - GM UPFITTER Bulletin 124d (… · 2014 Chevrolet Silverado 1500 2015-2016 Chevrolet...
UI Bulletin #124d
General Motors Upfitter Integration http://www.gmupfitter.com
Bulletin #124d P a g e 1 April 14, 2016
Disclaimer: GM Upfitter Integration Technical 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 and/or modification of a vehicle. These 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. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle.
Subject: Intermittent Cluster, Radio and HVAC Display Resets on Snow Plow Trucks
Models/Years
Affected:
2014 Chevrolet Silverado 1500 2015-2016 Chevrolet Silverado 2014 GMC Sierra 1500 2015-2016 GMC Sierra With Snow Plow Prep Package (RPO VYU)
Origination Date:
November 30, 2015
Revision
Date: April 14, 2016
ADVISORY:
Notice: GM Dealers refer to Service InformationPIT#5387 for labor code/time information
Condition/Concern:
Trucks equipped with option VYU [Snow Plow Prep] and a snow plow, may
exhibit occurrences in which the Instrument Panel Cluster (IPC), Radio and HVAC displays may “blank out” or reset after changing the snow plow
position. This condition is caused by a system voltage over-shoot phenomenon called ‘load dump’. When the large electrical draw of the plow
pump motor is suddenly removed the field energy that is built up in the
alternator causes a system voltage overshoot that momentarily moves above the normal design operating levels for the module displays. As a result the
displays will shut down or reset causing the momentary blank out condition. The modules are designed to do this and immediately recover. No modules
should be replaced for this condition.
Repair/Recommendation:
Contact your local GM Dealer for an appointment to install PN 84043394 VYU
Snow Plow Jumper harness per GM Service Bulletin PIT#5387.
Note: Your truck may already have the factory harness included as a loose part [in
the glove box]. If not, the jumper harness and installation will be provided [one
time] without charge. Installation charges will be waived only if the jumper is
installed at your GM dealer. If your truck was delivered with the harness you have
the option of having your snow plow dealer install it or you could do it yourself.
These installation costs would not be covered by GM.
UI Bulletin #124d
General Motors Upfitter Integration http://www.gmupfitter.com
Bulletin #124d P a g e 2 April 14, 2016
Disclaimer: GM Upfitter Integration Technical 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 and/or modification of a vehicle. These 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. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle.
Installation Instructions:
1. Single alternator systems:
a) Unplug the 2-way connector on the alternator.
b) Identify the master alternator connector [at the very tip of the harness
when it is fully extended.] Insert it in the alternator.
c) Take the original alternator connector and plug it into the mating jumper
harness connector. Note: In this case the second alternator connector will
be unused and will remain capped and tied to the harness bundle.
2. Dual alternator systems:
a) Unplug the control connectors on both alternators. Take the original
master alternator connector and plug it into the mating jumper harness
connector.
b) Identify the master alternator connector [at the very tip of the harness
when it is fully extended.] Insert it in the alternator on the RH side of the
engine.
c) Identify the ‘slave’ alternator connector on the jumper harness and insert
it in the LH alternator. Insert the removed LH alternator connector into the
[unwired] cap on the jumper harness.
3. All systems:
a) Route the snow plow jumper harness along the existing harness routing
as shown and secure with tie straps as appropriate.
UI Bulletin #124d
General Motors Upfitter Integration http://www.gmupfitter.com
Bulletin #124d P a g e 3 April 14, 2016
Disclaimer: GM Upfitter Integration Technical 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 and/or modification of a vehicle. These 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. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle.
b) Mount the relay to the underside of the fender inner at the pencil brace
bolt slipping the relay bracket over the threads and securing it with the nut
provided in the harness kit.
c) Further secure the relay bracket with a tie strap through the remaining
bracket hole to the pencil brace.
d) Locate appropriate connection points for the fused [+] red/orange
harness control wire and the black ground wire.
Note [1]: The appropriate plow control signal should be able illuminate a
test lamp when the plow motor is running and the lamp should go out when
the motor is not running. The jumper relay must be energized at the same
time that the plow motor is.
Note [2]: If this connection point is the coil of the motor power solenoid and
both terminals are hot [B+] when the motor is not running – monitor them
and discover which terminal goes to ground when the motor is running.
The one that goes to ground is the connection point for the black wire – the
one that stays at [B+] is the connection point for the fused wire.
e) For plows with all the control components mounted on the plow itself
Route the relay coil wires [blunt cuts] out through the grille to the
appropriate location to complete the required connections. See notes 1
and 2 in item d) above to correctly identify the connection points.
Note [3]: A pair of capped and sealed 2-way connectors must be installed so
the plow can be mounted and removed at will. M 2W = GM service kit
19119346. F 2W = GM service kit 19119765. 2 sets would be required so
caps can be fashioned from the extra parts .
4.
UI Bulletin #124d
General Motors Upfitter Integration http://www.gmupfitter.com
Bulletin #124d P a g e 4 April 14, 2016
Disclaimer: GM Upfitter Integration Technical 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 and/or modification of a vehicle. These 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. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle.
Note [4]: Some manufacturers of these style plows have an inexpensive
jumper harnesses [with a set of sealed connectors] and installation
instructions available to make this connection task easier.
f) For plows with the main hydraulic motor power solenoid mounted under
hood
Find the motor control solenoid and determine if one or both of the harness
control wires can be attached to it. See notes [1] and [2] above to correctly
identify the connection points you will use.
g) Route all wiring away from heat sources and any conditions that could
harm the wiring over time. Attach the jumper harness to existing wiring
bundle [with tie straps and edge clips provided] as per drawings below.
Allow slack for engine roll and vibration.
Note: This change will reduce the potential for the cluster/radio reset issue. It is still possible if the battery is very cold and the alternator voltage is very high that the first time the plow is cycled you might still see the symptom. Adding more electrical loads and reducing RPMs when releasing the control will help.
UI Bulletin #124d
General Motors Upfitter Integration http://www.gmupfitter.com
Bulletin #124d P a g e 5 April 14, 2016
Disclaimer: GM Upfitter Integration Technical 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 and/or modification of a vehicle. These 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. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle.
Additional Reference Information
Fig 1: Jumper harness wiring schematic
UI Bulletin #124d
General Motors Upfitter Integration http://www.gmupfitter.com
Bulletin #124d P a g e 6 April 14, 2016
Disclaimer: GM Upfitter Integration Technical 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 and/or modification of a vehicle. These 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. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle.
Fig: 2 Jumper Harness - Component Details
UI Bulletin #124d
General Motors Upfitter Integration http://www.gmupfitter.com
Bulletin #124d P a g e 7 April 14, 2016
Disclaimer: GM Upfitter Integration Technical 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 and/or modification of a vehicle. These 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. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle.
Fig: 3 Jumper Harness Layouts
UI Bulletin #124d
General Motors Upfitter Integration http://www.gmupfitter.com
Bulletin #124d P a g e 8 April 14, 2016
Disclaimer: GM Upfitter Integration Technical 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 and/or modification of a vehicle. These 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. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle.
UI Bulletin #124d
General Motors Upfitter Integration http://www.gmupfitter.com
Bulletin #124d P a g e 9 April 14, 2016
Disclaimer: GM Upfitter Integration Technical 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 and/or modification of a vehicle. These 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. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle.
Layout Details
1. Primary Alternator
2. Slave Alternator
3. Relay
4. Wires to plow [fused + & ground]
UI Bulletin #124d
General Motors Upfitter Integration http://www.gmupfitter.com
Bulletin #124d P a g e 10 April 14, 2016
Disclaimer: GM Upfitter Integration Technical 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 and/or modification of a vehicle. These 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. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle.
Detail 1
UI Bulletin #124d
General Motors Upfitter Integration http://www.gmupfitter.com
Bulletin #124d P a g e 11 April 14, 2016
Disclaimer: GM Upfitter Integration Technical 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 and/or modification of a vehicle. These 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. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle.
Detail 2
UI Bulletin #124d
General Motors Upfitter Integration http://www.gmupfitter.com
Bulletin #124d P a g e 12 April 14, 2016
Disclaimer: GM Upfitter Integration Technical 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 and/or modification of a vehicle. These 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. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle.
Detail 3
UI Bulletin #124d
General Motors Upfitter Integration http://www.gmupfitter.com
Bulletin #124d P a g e 13 April 14, 2016
Disclaimer: GM Upfitter Integration Technical 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 and/or modification of a vehicle. These 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. Contact GM Upfitter Integration for information on whether the information is applicable your vehicle.
Detail 4
Sealed 2 Way connector set [with caps] must be added if the harness goes
out to the plow. M 2W = GM service kit 19119346. F 2W = GM service kit
19119765. Caps can be fashioned from the extra parts. See plow manufacturer for
connection kits.