January 2014, Volume 16, No. 1
The 2014
The 2014 Cadillac ELR is a sleek luxury coupe that features the first application of
Extended Range Electric Vehicle (EREV) technology by a full-line luxury automotive brand.
EREV technology provides an EV range of approximately 37 miles (60 km) and a full driving
range of approximately 340 miles (547 km) by combining pure electric driving and a rangeextending 1.4L gas powered generator. Top speed is 106 mph (170 km/h). Uncompromising performance is delivered with 295 lb-ft of torque (400 Nm), more than the 3.6L V-6 in
the SRX.
2014 Cadillac ELR. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
In the primary electric mode, the ELR is powered by its high voltage propulsion battery,
until the battery is depleted to a predetermined
level. After that, the ELR uses a range-extending 1.4L gas powered generator that produces
enough energy to power it for hundreds of miles
on a single tank of gas.
With colder outside temperatures, the e
­ nergy
needed to warm the vehicle’s cabin and high
voltage propulsion battery can cause the
­vehicle’s electric range to decline.
Cold Weather EV Electric Range Tips. . . . . . . . . . . . . 3
Charging the ELR . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Tire Noise Diagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . 5
Instrument Cluster Not Displaying Data. . . . . . . . . . . 5
Unable to Rotate the Ignition Key. . . . . . . . . . . . . . . . 5
Climate Control and Heated/ Cooled Seat
Operation during a Remote Start . . . . . . . . . . . . . . . . 6
A green efficiency gauge indicates
efficient driving.
The distance the ELR can be driven in ­primary electric mode is greatly affected by driving style. Observing the green Efficiency Gauge in the instrument cluster can minimize
­aggressive and inefficient acceleration or d
­ eceleration.
Passenger Air Bag and Safety Belt
Indicator Information. . . . . . . . . . . . . . . . . . . . . . . . . . 6
EBCM DTC Set in History. . . . . . . . . . . . . . . . . . . . . .6
Tool Room Organization . . . . . . . . . . . . . . . . . . . . . . . 7
DTC P0300 Setting after Engine Repairs . . . . . . . . . . 7
2014 Caprice PPV. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Cold Weather Tire Pressure Monitor System Tips . . . 9
Electric range is maximized at 50 mph
(80 km/h) and below. Higher speeds use more energy and can significantly reduce electric
range. Total vehicle range is based on the ­available combined electric and extended range.
Tailgate Pop Noise . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TIP: The high voltage propulsion battery pack will not be recharged while in extended
range mode. To recharge the battery pack completely, the vehicle must be plugged in.
Car Issues – Fix It Right the First Time. . . . . . . . . . . 11
Key Off Radio Operation. . . . . . . . . . . . . . . . . . . . . . 10
EBCM Scan Tool Communication. . . . . . . . . . . . . . . 10
Truck Issues – Fix It Right the First Time. . . . . . . . . . 11
Service Know-How . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Regenerative Braking
When the vehicle is coasting or braking, the power inverter module may operate the drive
motor as a generator, exerting a driveline load that helps to slow the vehicle. The electrical
continued on page 2
Customer Care and Aftersales
2014 Cadillac ELR –
continued from page 1
Internal Combustion Engine (ICE) Starting
energy that the drive motor creates is transferred by the power
inverter module to the battery pack. Constant communication
between the power inverter module and the Electronic Brake Control Module allows the blending of regenerative braking force with
hydraulic braking force.
Instead of a 12 V starter motor, a much more powerful 300 V
Drive Motor A, located within the transmission, is utilized to crank
the engine. Drive Motor A can rotate the engine to operating
speed of 800 RPM within just a few hundred milliseconds, allowing
near-instant starting. The vehicle’s on-board computers determine
when the engine needs to run:
Regen on Demand
Regen on Demand will slow the vehicle by recapturing energy.
It works in Drive and Low. To activate Regen on Demand, pull
and hold either paddle on the back of the steering wheel without
pressing the brake pedal or accelerator pedal. Regen on Demand
is deactivated once the paddles are released, or the brake pedal
or accelerator pedal is pressed. Cruise control will turn off, and
the brake lights may turn on, when this feature is activated.
•The hybrid/EV battery pack has a low state of charge.
•The hood is open or not completely latched.
•The engine is needed to maintain the high voltage battery pack
•The engine needs to run for maintenance.
•Low ambient temperatures. At temperatures of 35°F (2°C) and
colder, the engine can run to provide both electric power and
heat to supplement the electric heater. This can happen regardless of battery charge level.
TIP: Regen on Demand will not stop the car.
Service Mode
The heart of the ELR's electric propulsion system is its advanced
Lithium-Ion Drive Motor Battery System. The hybrid battery
­contains 288 cells, organized into three battery sections, with a
nominal system voltage of 355 V direct current.
Service Mode is available for service and diagnostics and to verify
the proper operation of the MIL and may be required for emission
inspection purposes. With the vehicle off and the brake pedal not
applied, pressing and holding the POWER button for more than
5 seconds will place the vehicle in Service Mode. The vehicle will
not be able to be driven. The propulsion system will not start in
Service Mode.
The battery energy control module monitors the voltage of
the battery cells through four hybrid battery interface control
­modules. The battery is liquid cooled for long life and optimum
The high voltage battery is
located beneath
the vehicle. The
battery energy
control module,
battery interface control
modules 1-4,
current sensor,
The hybrid battery is organized into three
and high voltbattery sections beneath the vehicle.
age contactors
are located
within the battery assembly. The Powertrain Control Module 2
(the host controller for Diagnostic Trouble Code information) is
located under the front passenger seat.
The 4ET50 (RPO MKA) is a fully automatic electronically controlled transmission. It consists primarily of a torque dampener
assembly, an integral main and auxiliary fluid pump and housing,
one planetary gear set, three clutch assemblies, a hydraulic pressurization and control system, and two internal electric motors.
Drive motor generator A is 55 kW and drive motor generator B is
135 kW.
The planetary gear set provides the electrically variable forward
mode ratios and reverse. The TCM and the drive motor generator
power inverter module vary the torque output at the optimum time
based on throttle position.
The main hydraulic system primarily consists of a gerotor-type
pump, control valve body assemblies, dampener housing and case.
A secondary auxiliary pump with electric three phase high voltage
motor located inside the transmission maintains working pressures
when the engine is off.
TIP: Before performing service, ensure all High Voltage
Safety procedures and Warnings are followed exactly as written.
­Personal Protection Equipment (PPE) MUST be worn and proper
procedures MUST be followed.
The Manual Service Disconnect (MSD) is located under the front
floor console rear trim panel. Removing the rear trim panel will
expose the MSD.
The 2014 ELR uses GM’s Global A electrical architecture. This
architecture requires the use of the Global Diagnostic System 2
(GDS 2) software and the Multiple Diagnostic Interface (MDI)
Drive Motor Battery Charging
AGM 12V Battery
The lithium-ion high voltage battery pack can be charged using
the provided charging cord and a 120-volt standard outlet. Charge
times will vary with outside temperature.
The ELR uses an Absorbent Glass Mat (AGM) 12 V battery that
requires different charging voltages than conventional lead acid
batteries. The essential tool (GR-8) EL-50313 has this algorithm
built in. Select AGM when prompted or damage to the battery
will result.
Charging Status Indicators are located on the instrument panel
near the windshield and in the side mirrors (if activated).
The ELR uses the 12 V battery to wake up and initialize control
modules. If the vehicle does not power up, verify that the 12 V
battery is sufficiently charged to allow all of the control modules to
wake up.
continued on page 3
The underhood gas powered electric generator is a 1.4L DOHC
inline four cylinder engine that produces 83 HP (62 kW). Premium
gasoline with a posted octane rating of 91 or higher is required.
January 2014
Cold Weather EV Electric Range Tips
As temperatures fall, it’s important to
remind Chevrolet Volt and Cadillac ELR
owners that the electric range of their
vehicle can be affected. During colder
months, the energy needed to warm the
vehicle’s cabin and high-voltage battery
can cause the electric range to decline.
mode setting from Comfort to Eco to help
reduce the energy used to heat the cabin.
If equipped, use the automatic heated
seats to keep warm. The heated seats use
less energy than heating the entire cabin.
To help maximize electric vehicle (EV)
electric range during cold weather, follow these tips. They can help Volt and
ELR owners in all climates increase their
­vehicle’s efficiency.
As the outside temperature drops, the
air pressure in the tires drops as well.
Check the tire pressure and add more air
if needed to maintain the tire pressures at
the recommended level. Recommended
tire pressure is on the Tire and Loading
Information label inside the driver’s door
opening. Properly inflated tires can help
improve electric range and fuel economy.
Precondition while Plugged-In
Take advantage of the power of the grid
to heat the cabin and the high-voltage
battery prior to driving. The Volt and ELR
can be remote started several ways while
plugged in, including using the key fob or
the OnStar RemoteLink app available on
compatible smartphones and tablets.
Using energy from the grid to warm the
cabin enables the stored battery energy to
be reserved for driving. Maximum benefit
is provided when using a 240V charger.
Keeping Warm on the Road
To maximize electric range, set the climate
Check Tire Pressures
Engine-Assisted Heating
On 2013-2014 Volt and 2014 ELR only,
this feature enables owners to select the
outside temperature level at which the
gas-powered generator will run to assist
heating while driving in Electric Mode.
The Engine-Assisted Heating options are:
•At Cold Outside Temperatures, below
approximately 35°F (2°C). This selection
maximizes the battery range and uses a
very small amount of gasoline to help
2014 Cadillac ELR –
power the vehicle during cold temp­
•At Very Cold Outside Temperatures,
below approximately 15°F (−10°C). This
selection uses less gasoline, but has a
larger adverse impact on battery range.
Three T’s
Remind customers of the three T’s to
maximizing electric range.
Temperature – Cold weather will
adversely impact electric range, but efficient use of the climate system and prewarming the vehicle while it is plugged in
can help reduce the effect of cold outside
temperatures on electric range.
Terrain – Going up and down hills is
less efficient than driving on flat surfaces.
Where possible, avoid hilly routes to maximize electric range.
Technique – Aggressive acceleration
and deceleration are not as efficient as
smooth, easy starts and stops. Use the efficiency gauge in the instrument cluster to
help drive more efficiently.
Thanks to Keith Newbury
continued from page 2
If the vehicle’s 12 V battery is weak or disconnected, the door
handle touch pads and door latch buttons may not operate. The
doors can be opened from the outside manually by opening the
trunk with the door key and pulling the door release tab below the
package shelf.
Heating and Air Conditioning
The heating system uses a high voltage heater when the engine
is not running and passenger compartment heat is requested. The
HVAC control module monitors the temperature sensors in the
passenger compartment, outside air, engine radiator, high voltage
heater and the engine to determine the position of the coolant flow
control valve and if the high voltage heater is needed.
The 300 V electric A/C compressor is a self contained high
­voltage inverter, electric motor, and direct coupled compressor. It
can provide cooling even when the engine is not running. The pulse
width modulated electric A/C compressor runs at a speed necessary to maintain a desired cooling level rather than cycling the
compressor on and off.
At high ambient temperatures and high humidity, the driver may
notice a unique high-pitched sound from the compressor when the
vehicle is stopped or at low speeds. This is considered normal. The
A/C compressor is serviced as a unit.
Normal Sounds
– the electric engine cooling fan, coolant pumps, the air conditioning compressor and the HVAC blower. The drive motor battery
cooling system may be operational during charging or when the
vehicle is powered down.
The electric motor may be heard as the vehicle moves. This is a
normal operating characteristic.
ELR uses active noise cancelling at all engine speeds. It gathers
input from the generator and powertrain, and from three ceilingmounted microphones. The system produces a noise-cancelling
signal through the audio system.
Hoist Contact Lift Points
A low profile lift arms system may be required to
avoid unwanted contact
with the vehicle's body and
structure depending on
the lifting equipment being
used. Refer to the hoist
manufacturer's recommendation.
Refer to #PI1141 for
further details, including
required service training courses and a list of
­special tools.
Proper front hoist contact lift point.
Due to the quiet nature of the ELR's propulsion system, certain
sounds that otherwise may have been masked will be apparent
Thanks to Chuck Wieseckel and Sherman Dixon
January 2014
Charging the ELR
The 2014 Cadillac ELR with its Extended Range Electric Vehicle
(EREV) technology provides an EV range of approximately 37
miles (60 km) and a full driving range of approximately 340 miles
(547 km), by combining pure electric driving and its range-extending 1.4L gas powered generator.
On the side mirror,
the light indicators
show the progress
of the charging
event. They are:
The lithium-ion high voltage battery pack holds its charge
­efficiently and has no memory effect, so it doesn’t have to be run
down completely before recharging. Keeping the vehicle plugged
in, even when fully charged, will keep the battery temperature
ready for the next drive.
Solid green –
Battery is charging; charging is
less than half
Charging Time
Fast flashing
green – Charging
is more than half
The ELR can be programmed for three charging modes: Immediately upon plug-in; Delayed based on departure time; and Delayed
based on electric rate and departure time.
Slow flashing green – Charging is nearly complete
Using a 120-volt standard outlet will take approximately 12.5
hours to charge the ELR at the 12-amp setting, or 18 hours at
the 8-amp default setting. Using a 240-volt charging station will
take approximately 5 hours. Charge times will vary with outside
TIP: Before
plugging in to any
electrical outlet,
have a qualified
electrician inspect and verify
the electrical
system (electrical outlet, wiring,
junctions and
protection devices) for heavyduty service at a
12-amp continuous load.
No light – Charge is complete or not charging Charging
1.Place the vehicle in Park.
2.Select the Charging icon at the bottom of the Energy screen on
the touch screen.
3.Review the selected Charge Level and Charge Mode. Touch
the green text if an increased Charge Level or different Charge
Mode is desired. The Charge Level selection automatically
­returns to the reduced level each time the vehicle is driven.
4.Once the Charge Level and Charge Mode are selected, turn off
the vehicle.
5.Remove the charge cord from the trunk and plug it into an electrical outlet. DO NOT PLUG INTO AN EXTENSION CORD.
The charge cord indicator on the base of the charge card should
be green.
Touch the green text to change the
Charge Level or Charge Mode.
•Always properly support
the charge
cord at all
times and do
not let it hang
from the plug
or outlet.
Touch the green leaf Energy icon on the infotainment touch screen
and then touch the Charging icon to view the current Charge
Level and Charge Mode status.
•Touch the green Charge Level text to select a different
charge level.
•Touch the green Charge Mode text to select a different
charge mode.
outlets may
wear out with
normal usage
Instrument panel charging status indicator
or be damaged
over time,
making them
unsuitable for electric vehicle charging.
Charging Status
Charging Status Indicators are located on the instrument panel
near the windshield and in the side mirrors (if activated in the Vehicle Personalization menu).
On the instrument panel, the light indicators are:
•Solid green with single horn chirp – Vehicle is plugged
in; battery is charging
•Check the electrical outlet/plug while charging and discontinue
use if the electrical outlet/plug is hot; have the electrical outlet
serviced by a qualified electrician.
•Slow (long pulse) flashing green with double horn
chirp – Vehicle is plugged in; battery charging is delayed
6.Press and release the rear edge of the charge port door,
­located just in front of the driver’s door, to open the door. Plug
the charge cord into the charge port. •Fast (short pulse) flashing green – Vehicle is plugged in;
battery is fully charged
•Solid yellow – Vehicle is plugged in; not charging
Once charging is complete, unplug the charge cord by pressing
the plug release button on the cord, unplug the cord from the
electrical outlet and properly stow the charge cord.
•No light – Vehicle is not plugged in or there is an issue with
the charger or outlet
•No light and repetitive horn chirps – Electricity was
­interrupted before charging was completed
Side mirror charging status indicator
Thanks to Keith Newbury and Sherman Dixon
January 2014
Tire Noise Diagnosis
If owners comment about noise related to the tires on their
­vehicle, there are many factors to consider when performing
diagnosis. For example, the amount of tire noise may be due to
the tire design, a change from one tire brand to another, or vary
based on road speed and road surfaces.
A tire with an
­aggressive tread
design will tend to
be the most noisy.
So winter tires often
will be more noisy
than all-season
tires, which have
a tendency to be
noisier than summer
only tires. This is
Larger diameter tires with shorter
because of the more
sidewalls may be perceived to be noisy
aggressive tread
compared to smaller tires.
that is designed to
work well on ice and
snow covered roads.
Different tires also may be noisier on some surfaces than others.
In addition, larger diameter tires with shorter sidewalls, popular
on many new models today, also may tend to be perceived as
noisy, especially when compared with a previous vehicle with
smaller tires.
Compare Tires
Before tires are replaced for a noise condition, they should be
compared with a like vehicle with the same tire brand and model
to see if there is any other reason for the noise level in the vehicle. If the vehicle with the tire noise concern is similar to other like
vehicles, the tires should not be replaced. Under no circumstances
should tires ever be replaced for noise levels that are consistent
from one vehicle to another. Also, a summer only tire should never
be used as a replacement tire to address a noise concern on a
vehicle equipped with all-season tires. This can create undesirable
handling conditions in icy or snowy weather.
Match TPC
A second consideration when diag­
nosing tire noise
is the use of aftermarket tires that do
not meet the GM
Tire ­Performance
Criteria (TPC)
TPC spec marked on the tire
­specification marked
on the original
equipment tires. The tires on all new production models have a
TPC rating number molded on the sidewall. The TPC rating will
appear as a 4-digit number preceded by the letters TPC SPEC on
the tire wall near the tire size.
Non-TPC marked tires may have been installed by the owner or
a used vehicle department. The tread noise of the tires is taken
into consideration as part of the engineering development and
validation of GM vehicles. If the tire performance is changed with
the ­installation of non-TPC aftermarket tires, noise levels may
increase considerably.
If tire noise is noticed in a vehicle that has a replacement tire
installed, another set of tires and wheels from a similar vehicle
should be installed to rule out the tires as a source of noise.
Noises from some tread designs may sound remarkably similar
to wheel bearings or driveline components, especially at lower
speeds and with the HVAC and infotainment systems turned off.
A replacement tire should have the same TPC specification
­number as the original equipment tire. This will ensure the same
size, the same load range, and the same construction as those
originally installed on the vehicle.
After diagnosis, if a customer is not satisfied with what is considered to be a normal tire noise level when compared with like
vehicles, the customer’s concern should be reviewed with the local
Thanks to David MacGillis
Instrument Cluster Not
Displaying Data
Unable to Rotate the
Ignition Key
The Instrument Panel Cluster on some 2014 Lacrosse models built
before December 19, 2013 and 2014 Regal models built before
January 21, 2014 may not display radio or phone data. An Audio Off
message may be displayed on the Driver Information Center and
the right audio steering wheel controls may be inoperative. In addition, the instrument cluster may intermittently display “Sport” mode
and other personalization features may return to the factory default
On the new 2014 Silverado 1500 and Sierra 1500 trucks, a
steering column lock has been incorporated into the ignition
key housing assembly as standard equipment. If the steering wheel is turned with the ignition key in the OFF position,
it may cause excessive pressure between the lock plate and
lock pin. The next time the ignition key is rotated from the
OFF to the ON position, it may be difficult to rotate the key.
The steering wheel will need to be rotated in either direction
(depending on how the locking pin engaged to the locking
plate) to alleviate the pressure between the steering column lock pin and lock plate. This will allow the ignition key
to rotate from the OFF position. The ignition key may need
to be rotated at the same time the steering wheel is being
These instrument cluster conditions may be the result of a reset
­condition within the Instrument Panel Cluster.
New Instrument Panel Cluster software has been released to
­address these conditions. Use TIS2Web to update the Instrument
Panel Cluster calibrations and confirm proper operation.
TIP: The updated software only applies to vehicles built before the
listed build dates if audio is still present, the radio controls still function, and no current infotainment DTCs are set.
This is a normal characteristic of the vehicle. No additional
repairs should be made.
Thanks to Jim Will
Thanks to Christopher Crumb
January 2014
Climate Control and Heated/Cooled Seat Operation
during a Remote Start
The following systems on the 2014
­Silverado 1500 and Sierra 1500 may
­operate during a remote vehicle start:
•Climate controls
on for 10 minutes when the key is turned
to Run/On. The rear window defogger indicator will not be illuminated until the key
is turned to Run/On.
•Rear window defogger
Heated Seats
•Heated seats
During a remote start, the heated seats
will turn on (if enabled) to the high setting
when the ambient temperature is below
•Cooled seats
•Heated steering wheel
Climate Control (HVAC)
During a remote start, the HVAC settings
will operate at the previous HVAC settings
when the vehicle was last turned off. If
the owner desires a certain HVAC setting
during a remote start, the HVAC mode,
blower and temperature should be set
prior to turning off the truck.
Rear Window Defogger
During a remote start, the rear window
­defogger will turn on if the outside temperature is 44° F (7° C) or below. It will stay
Owners of some 2007-2013 Silverado and
Sierra; 2014 Silverado 2500/3500 and
­Sierra 2500/3500; and 2008-2009 ­Hummer
H2 models may question if their vehicle
should have the following options:
•Passenger air bag On/Off indicators =
YES, located in the overhead console
•Passenger Presence System (PPS)
•Passenger safety belt indicator = NO
•Passenger air bag On/Off switch
•Passenger air bag On/Off switch =
YES, located in the lower glove box
(RPO C99)
2500/3500 Crew Cab Models
•Passenger safety belt indicator
•Passenger Presence System (PPS) =
NO, Not available
This information does not apply to the new
2014 Silverado 1500 and Sierra 1500.
•Passenger air bag On/Off indicators
= NO
The following information outlines the
­content of each model.
•Passenger air bag On/Off switch = NO,
Not available
1500 All Models
•Passenger safety belt indicator = NO
•Passenger Presence System (PPS) =
YES, standard equipment (RPO AL0)
Hummer H2
•Passenger air bag On/Off indicators =
YES, located in the overhead console
•Passenger air bag On/Off switch = NO
•Passenger safety belt indicator = YES,
located in the overhead console
2500/3500 Regular and
Extended Cab Models
•Passenger Presence System (PPS) =
NO, Not available
Cooled Seats
During a remote start, the cooled seats
will turn on (if enabled) to the high setting
when the ambient temperature is above
80° F (27° C). They will turn off when the
key is turned to Run/On. The cooled seat
indicators will not be illuminated when the
cooled seats are on during a remote start.
To enable the cooled seats to operate
­during a remote start, go to the Vehicle
Settings menu.
Heated Steering Wheel
Go to the Vehicle Settings menu to
enable the heated/cooled seats during a
remote start. The seat indicators do not
illuminate during a remote start.
Passenger Air Bag and Safety Belt
Indicator Information
•Passenger air bag On/Off indicators
50° F (10° C). They will turn off when the
key is turned to Run/On. The heated seat
indicators will not be illuminated when the
heated seats are on during a remote start.
To enable the heated seats to operate
during a remote start, go to the Vehicle
Settings menu.
•Passenger Presence System (PPS) =
NO, Not available
•Passenger air bag On/Off indicators =
YES, located in the overhead console
•Passenger air bag On/Off switch =
YES, located in the lower glove box
(RPO C99)
•Passenger safety belt indicator = NO
Thanks to Scott Fribranz
During a remote start the heated steering
wheel does not turn on.
Thanks to Jim Will
DTC Set in
When performing a DTC check
using a scan tool on some 2014
Malibu models, the Electronic
Brake Control Module (EBCM)
may have a DTC C025E SYM5A
(Vacuum Sensor Signal Is Not
Plausible) set in history. When
the DTC is cleared, it may set
again and immediately go to
history during the next ignition cycle. No messages will be
­displayed on the Driver Information Center and no Malfunction
Indicator Lamps will be illuminated on the instrument cluster.
Do not replace any components
for this condition. This is a normal operating characteristic. The
DTC clears when the diagnostic
runs and passes.
Thanks to Christopher
January 2014
Tool Room Organization
Are you searching for tools instead of
working on vehicles? Need an easy way
to keep the dealership’s essential tools
Without an organized essential tool
­system, a technician can spend an average of 60 minutes a week looking for the
right tools for a repair, which equates to a
$60,000 loss per year in billable income.
GM 4-Cabinet Essential
Tool Storage System
The Essential Tool Storage System
•A four-cabinet system with 50 drawers
and 2 bulk overhead cabinets
•A small footprint — the system measures 120”w x 28”d x 94”h
•Individual drawer layout sheets show
tool location and part/tool number
•Storage for 909 required tools (872 in
drawers and 37 in overhead cabinets)
•An organized system that places each
essential tool in a specific location
based on its dimensions in order to
maximize cabinet storage space and
minimize the footprint on the shop floor.
4-Cabinet Essential
Tool Storage System
GM offers several ways for dealerships to get organized. The GM-authorized Essential Tool Storage System
(554-GMEST-HV4-2012) makes it possible to never misplace a tool again instead
of spending valuable time digging through
piles of tools. Plus, the GM Special Tools
Organization website managed by Bosch
provides a convenient way to inventory
all essential tools as well as check the essential tools that have been released each
model year and their applications. The
website is available to all GM dealerships
at no additional cost as part of their dealership service agreement.
In addition to the storage system, several
other organization systems are available.
Each is designed to help dealerships find
the best way to organize and utilize the
essential tools that are critical to properly
making repairs.
For additional information about the
GM-authorized Essential Tool Storage System and other storage systems,
visit www.gmdesolutions.com or call
1-800-GM-TOOLS. In Canada, contact
Dealer Equipment Services (DES)
Canada at 1-866-868-3372 or visit
Tool Organization Website
The GM Special Tools Organization
website managed by Bosch can help
dealerships manage their essential tool in-
The website provides monthly
tool lists and information.
ventory, regardless of the type of storage
system used in the individual dealership.
The website provides quick access to a
variety of special tool information:
•All monthly essential tool shipment
­notices are posted by year/month
•An electronic catalog lists all GM
­essential service tools
•Essential service tool lists, organized by
franchise, are updated monthly
•Detailed reports of all essential tools,
including tool numbers, applications,
tool descriptions, illustrations, and price
available in printable reports
The GM Special Tools Organization website is accessed via the link provided in
GlobalConnect Service Workbench. On
the home page for GM Special Service
Tools, click the GM Tool Organization link
on the left side of the page to log in to the
website. (In Canada, go to GlobalConnect
Service Library > Tools, Processes and
Thanks to Kent Woiak.
DTC P0300 Setting after Engine Repairs
DTC P0300 (Engine Misfire Detected)
may set after performing engine repairs
on the following vehicles equipped with a
V8 engine:
•2002-2014 Silverado HD, Sierra HD
•2004-2007 Rainier
•2006-2009 Impala SS
•2008-2009 LaCrosse, Allure
(Canada Only)
•2006-2007 Monte Carlo SS
•2006-2013 CTS-V
•2005-2013 Corvette
•2002-2013 Escalade
•2003-2010 Hummer H2
•2010-2013 Camaro
• 2008-2010 Hummer H3
•2011-2013 Caprice PPV
•2002-2013 Avalanche
•1999-2013 Express, Silverado,
­Suburban, Tahoe, Savana, Sierra,
January 2014
•2009-2013 Colorado, Canyon
•2003-2009 Trailblazer, Envoy
It is possible to have the fuel injector
electrical connectors crossed for cylinders 5-7 and 6-8, which may cause an
engine misfire. The engine misfire may
not be detected and may happen during
If crossed injector connectors may be a
possible cause, follow the appropriate
Service Information to validate the injector
connector routing. If necessary, correct
the injector connector routing and evaluate for proper operation.
•2003-2006 SSR
• 2008-2010 G8
Thanks to Richard Renshaw
• 2005-2006 GTO
• 2005-2008 Grand Prix GXP
• 2005-2009 Saab 97X
2014 Caprice PPV
The door lock button has been relocated to the top-rear of the
door. Pull the interior door handle once to unlock and pull it again
to open the door. In addition, standard trunk release buttons are
on both front door interior panels.
The auxiliary battery, located in the trunk, has a higher capacity
700 CCA to power accessory equipment.
To deliver enhanced performance, electric power steering is
­standard. The thicker front struts (32 mm instead of 30 mm) and
front stabilizer bar (26 mm instead of 24 mm) also provide improved handling.
Special Features
An auxiliary 110-amp ignition and main power supply wiring
­harness is located under the lower right side of the instrument
panel. One 50-amp battery power circuit and two 30-amp relay
controlled circuits are in a five foot coil provided for customer
connection. The harness includes signal circuits for ignition power
(Hot in Start/Run and Accessory/Run), vehicle radio mute,
­vehicle speed signal and park-enable.
The Chevrolet Caprice Police Patrol Vehicle (PPV) has been
equipped with several new features and enhancements for 2014
designed to provide a more tailored fit for law enforcement. These
changes include an all-new column-mounted transmission gear
selector, which opens up room for a standard steel center console
mounting platform for police equipment.
Surveillance Mode is standard on the Caprice PPV. The Surveillance Mode circuit is terminated in cavity 1 of the 16 cavity
­upfitter connector P277, located at the passenger-side front of the
equipment mounting platform.
New Features
The transmission gear
selector has
been relocated from
the center
console to
the steering
When Surveillance Mode is activated by applying a ground to
the White/Violet wire in cavity 1, all automatic lighting functions
are suppressed. All manually operating lighting controls remain
functional. If equipped with RPO VVS, Daytime Running Lamps
and Automatic Headlamps Disabled, exterior lights are controlled
manually. Surveillance Mode suppresses all of the following items:
•Radio display is off (audio remains on)
•Headlamps and tail lamps are off
The new open
center conThe Caprice PPV features
sole provides
a new, open console.
space for an
mounting platform, which comes installed as standard equipment,
and serves as a heavy-duty foundation for a computer and other
equipment typically used in police vehicles.
•Dome lamps are disabled (inoperative at the lamp switches)
•All interior lighting is off
•Remote Lock/Unlock audible/visual functions are off
RPO 7Y6, Inoperative Dome/Courtesy Lamps, has been deleted
for 2014 and replaced by a switch in the front dome lamp assembly. Activate the switch to have the dome lamps remain off when
any door is opened, the vehicle is unlocked, or the key is removed
from the ignition switch.
The all-new instrument panel features an 8-inch Chevrolet MyLink
touch screen with Bluetooth® streaming audio, cell phone connectivity, and voice recognition. Applications requiring a USB connection are not compatible.
The Caprice PPV does not come equipped with OnStar.
Transport Mode
The revised
front seats
and support
for officers
wearing a
utility belt.
Front hip
room has
increased to
57.5 in. from
Auxiliary battery in the trunk.
56.7 in. The
front seats
have 4-way
power seat adjusters and power lumbar adjustment.
All 2014 model year vehicles leave the assembly plant with
­Transport Mode active to save battery power. The Driver Information Center (DIC) will display Transport Mode On when enabled.
TIP: The driver’s express power window learn procedure may
need to be performed after turning off Transport Mode. When in
Transport Mode, the remote function will be inoperative. As the
Remote Keyless Entry will not allow remote unlocking of the vehicle, the vehicle will need to be unlocked with the mechanical key.
To disable Transport Mode:
1.Turn on the hazard flashers.
2.Apply the brake pedal.
3.Turn the ignition key to the Start position and hold for 15
­seconds; continue to depress the brake pedal.
4.Transport Mode Off will display in the DIC when disabled.
continued on page 9
January 2014
2014 Caprice PPV –
continued from page 8
Pre-Delivery Inspection
The 2014 Caprice PPV uses the Global A electrical architecture,
which requires the use of the GDS 2 for diagnostics.
The factoryinstalled rear
disc brake
rotor protection
­covers must be
removed during
the PDI. With
the vehicle on
a hoist, rotate
the wheel while
at the same
time pulling
Remove the brake rotor protection
the torn end of
covers during PDI.
the cover away
from the disc
brake rotor and wheel. Ensure that all material is removed and
­repeat for the other side.
For programming, the vehicle may be found under the Chevrolet
Holden heading.
Two keys with Remote Keyless Entry functionality are provided
for the Caprice PPV. Options 6E3 or 6E4 are available for police
departments requiring a single key for the entire fleet. These common key options provide a single key with a specific code that is
common to the door locks and ignition for all the vehicles in the
vehicle fleet. They are not compatible with Impala, Tahoe and the
previous Caprice police vehicles.
TIP: If the engine is running or the key is left in the ignition with
the engine off, the Remote Keyless Entry function of a second key
cannot be used to operate the door locks.
Thanks to Brad Thacher
Cold Weather Tire Pressure Monitor System Tips
As the temperature drops in the winter
months, more customers will see the low
tire light on their instrument cluster illuminate indicating low tire pressure.
As a rule of thumb, tire pressure will
change about 7 kPa (1 psi) for every
10°F (6°C) decrease or increase in temperature; so tire pressure will drop when it
gets colder outside and rise when it gets
If the low tire pressure light illuminates,
customers that are not familiar with the
operation of the Tire Pressure Monitor
system in their vehicle may come to the
dealership for service.
TPM Low Tire Light
If the TPM low tire light on the instrument
panel is illuminated, determine if the light
is due to low tire pressure or if it is the
­result of a TPM malfunction.
the tires. After driving awhile, the tires
will heat up, allowing air pressure to increase above the threshold, causing the
light to go off. Properly adjust all tire
pressures to the recommended levels.
•If the low tire light flashes for one
­minute and then stays on solid (a
­service tire monitor system message
may be displayed on the Driver Information Center), a TPM system condition
exists. The vehicle will require further
Dashes Indicate System
specific vehicle corner. When performing
a TPM relearn (only after a tire rotation or
replacement of a TPM sensor or module),
use a scan tool (GDS 2 or the Tech 2),
the J-46079 TPM Tester or the EL-50448
TPM Activation Tool to initiate the relearn
process and lock out other vehicle TPM
signals that may be broadcasting in the
area. This method avoids storing false
TPM I.D.s and will prevent vehicles from
returning with dashes displayed in the tire
pressure readouts and/or a flashing low
tire light. Check the four TPM I.D.s with a
scan tool prior to and following the relearn
procedure to verify they are the same.
If dashes (---) are displayed in only one
or two of the tire pressure readouts, it is
likely caused by a previous TPM system
relearn that was performed incorrectly
due to interference from another vehicle’s
TPM system during the relearn process.
Each tire monitor sensor is learned to a
Turn the key on, without starting the
•If the low tire light illuminates and stays
on solid (a low tire pressure message
may be displayed on the Driver Information Center), tire air pressure is low.
Properly adjust all tire air pressures to
the recommended levels. Driving the
vehicle will turn off the light.
•If the low tire light illuminates for a few
minutes when the vehicle is started and
then goes off after driving, the tire air
pressure is likely low in one or more of
January 2014
EL-50448 TPM Activation Tool
If dashes (---) are displayed in all four
of the tire pressure readouts, there is a
system condition. Follow the appropriate
Service Information procedures.
Thanks to Dave MacGillis.
J-46079 TPM Tester
Tailgate Pop Noise
On some 2014 Silverado 1500 and
Sierra 1500 models equipped with
the EZ Lift and Lower Tailgate (RPO
PPA), a pop/snap/click-type noise
may be heard when the tailgate is
opened. It may sound like the noise
is coming from the right-side hinge
area. The noise may be caused by
the tailgate dampener mounting nut
not being torqued properly
GM TechLink is published for all
GM retail technicians and service
consultants to provide timely
information to help increase know­
ledge about GM products and
improve the performance of the
service department.
To correct this condition, inspect
the tailgate dampener mounting
nut for proper torque. It should be
torqued to 25 Nm (18 lb ft) +/- 3
Nm (2 lb ft).
John Meade
GM Customer Care and Aftersales
Tailgate dampener mounting nut
Thanks to James Will
Mark Spencer
/ mspencer@gpstrategies.com
Some customers may not fully understand
the operation of the navigation radio
(RPO UYS) with the key off in 2012-2014
Escalade models; 2012-2013 Avalanche,
Silverado, Suburban, Tahoe, Sierra, Yukon
models; 2013-2014 Express and Savana;
2014 Silverado 2500/3500, Suburban,
Tahoe, Sierra 2500/3500, and Yukon
The radio can be turned back on after the
Retained Accessory Power has been canceled by simply pressing the Power button
on the radio. If the radio is turned on using
this method, opening the driver's door will
not turn the radio off. The radio will remain
on for about 10 minutes.
Lisa G. Scott
GM Customer Care and Aftersales
Technical Editor:
Key Off Radio Operation
The radio will work when the ignition key is
in the On/Run or Accessory position. Once
the key is turned to the Off position, the
radio will continue to work for 10 minutes
or until the driver's door is opened. This is
when the radio is powered by the Retained
Accessory Power (RAP).
Production Manager:
Marie Meredith
Desktop Publishing:
5by5 Design LLC
/ dkelly@5by5dzign.com
FAX number:
Write to:
PO Box 500
Troy, MI 48007-0500
When the radio turns off after 10 minutes,
it can be turned back on by pressing the
Power button again.
The radio also can be turned off at any time
by pressing the Power button.
Thanks to Scott Fibranz
EBCM Scan Tool Communication
The ABS/Traction Control MILs may be illuminated in the instrument cluster on some
2014 Veranos. During diagnosis, the initial scan for diagnostic codes using a scan tool
may show that there is a DTC U0415 (Invalid Data Received from Electronic Brake
­Control Module) stored. It also may not be possible to communicate with the K17
­Electronic Brake Control Module (EBCM).
Currently, there is an issue with GDS 2 where it is not allowing the scan tool to communicate with the EBCM. For a current work around, it is recommended to build the ­vehicle
as a 2013 model year Verano. This will allow the scan tool to communicate with the
EBCM and address any current DTCs that might be stored.
GM TechLink on the Web:
GM GlobalConnect
General Motors service tips are intended
for use by professional ­technicians, not
a “do-it-yourselfer.” T­hey are written to
inform those ­technicians of conditions
that may occur on some vehicles, or to
provide­information 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
information applies to your vehicle or that
your vehicle will have that condition. See a
General Motors dealer servicing your brand
of General Motors vehicle for information
on whether your vehicle may benefit from
the information.
Inclusion in this publication is not
­necessarily an endorsement of the
individual or the company.
Copyright© 2014 General Motors
All rights reserved.
A correction to this condition is being developed.
Thanks to Christopher Hightower
January 2014
Car Issues – Fix It Right the First Time
Vehicle Line(s)/Condition
Do This
Don’t Do This
Volt – Multiple navigation radio screen issues, does
not recognize Global Positioning System (GPS),
radio screen goes blank, no GPS signal, navigation
stuck or will not switch and show correct location
Check for loose coaxial connection.
Replace radio.
Spark – A/C inoperable, blows warm air
Replace the A/C line, install pressure switch
and harness.
Replace AC compressor
without diagnostics.
SRX – Heated seat indicator lights momentarily
when activated/heated seats inoperative/ DTC
U1524 stored
Replace the heated seat control module.
Replace the center stack or
memory seat control module.
Volt, Terrain, Malibu, Equinox, Cruze, Camaro,
Verano, Regal, Encore, LaCrosse – Radio locks up
and/or resets, Bluetooth® pairing, voice recognition
and navigation updates
Update the radio software through Radio SPS
Replace the radio.
Truck Issues – Fix It Right the First Time
Vehicle Line(s)/Condition
Do This
Don’t Do This
Terrain, Equinox – Creak or pop type noise
coming from windshield area during cold ambient
Liberally spray lubricant between the outside
edge of the windshield glass and trim molding.
Replace or reseal the
Trax, Encore – Water accumulating in door sill plate
area/slosh type noise
Punch holes in lower part of weather strip per
diagram on each door using similar tool.
Replace weather strip.
Silverado, Sierra – Normal characteristic - Drivers
(left) outside rearview mirror takes longer to clear
than passenger side
Please share the detail information with all
involved dealership personnel.
Replace mirror, wiring, or
Encore – Rear brake noise on first apply
Install damper on rear caliper.
Install brake pads or rotors.
SRX – Creak or pop noise heard from front hub
bearing while making turns
Check front hub bearing fastener torque.
Replace the rear HVAC
controls, or HVAC control
SRX, XTS – Unwanted activation of rear heated
For the SRX, reprogram the HVAC control
module and rear seat heater module. For the
XTS, check the BCM calibration for the latest
update and reprogram the HVAC control
Replace the rear HVAC
controls, or HVAC control
SRX – Normal characteristic – High pitched whine
or squeal noise coming from front wheel area
Explain to the customer the noise is normal
due to the electrical current going through the
control solenoids.
Replace wheel speed
sensors, struts or EBCM.
SRX – CD or DVD player will not eject disc
Test the multi-function switch. If it fails the
test, replace it.
Replace the CD player.
10214.01D Emerging Issues
January 10, 2014
To view Emerging Issues seminars:
• Log in to www.centerlearning.com
– Select Resources, and then Video on Demand; or
– Select Catalog to search for the course number, and then
select View > Take or Continue Course
Customer Care and Aftersales
January 2014