ignition CHEVROLET IMPALA 2016 10.G Bifuel Manual

Chevrolet Impala Bi-Fuel (Gasoline/CNG) Supplement (GMNA-Localizing-U.
S/Canada-9087624) - 2016 - CRC - 8/17/15
Instruments and Controls 3
Instruments and
Controls
Warning Lights, Gauges, and
Indicators
Fuel Gauge . . . . . . . . . . . . . . . . . . . . . 3
Malfunction Indicator Lamp(Check Engine Light) . . . . . . . . . . 4
Low Fuel Warning Light . . . . . . . . . 5
Information Displays
Driver Information
Center (DIC) . . . . . . . . . . . . . . . . . . . 5
Vehicle Messages
Fuel System Messages . . . . . . . . . 6
Warning Lights,
Gauges, and
Indicators
Fuel Gauge
The vehicle has a fuel gauge that
displays either gasoline or CNG fuel
level.
Metric
English
With the ignition on, the gasoline/
CNG fuel gauge indicates remaining
fuel in the tank for the fuel that is
being used. See “Fuel Selector
Switch” underFuel08.
To check the level of the fuel not
being used, see Driver Information
Center (DIC) 05.
For CNG, the fuel gauge has been
calibrated to display full at
approximately 24 800 kPa
(3,600 psig) and empty at
approximately 2 758 kPa (400 psig).

Chevrolet Impala Bi-Fuel (Gasoline/CNG) Supplement (GMNA-Localizing-U.
S/Canada-9087624) - 2016 - CRC - 8/17/15
4 Instruments and Controls
CNG fuel gauge readings are
affected by changes in fuel
temperature and fuel pressure.
See“Fuel Gauge” in the owner
manual.
Malfunction Indicator
Lamp (Check Engine
Light)
The malfunction indicator lamp is in
the instrument cluster.
This vehicle has been specifically
designed to illuminate this indicator
when emissions exceed acceptable
levels while operating on either
gasoline or CNG fuel.
The malfunction indicator lamp
comes on to indicate that there is a
problem and service is required.
Malfunctions often will be indicated
by the system before any problem is apparent. This system is also
designed to assist the service
technician in correctly diagnosing
any malfunction.
Caution
If the vehicle is continually driven
with this light on, the emission
controls might not work as well,
the vehicle fuel economy might
not be as good, and the engine
might not run as smoothly. This
could lead to costly repairs that
might not be covered by the
vehicle warranty.
This light should come on as a
check to show you it is working
when the ignition is on and the
engine is not running.
This light comes on during a
malfunction in one of two ways:
Light Flashing
A misfire condition has been
detected. A misfire increases
vehicle emissions and could damage the emission control
system on the vehicle. Diagnosis
and service might be required.
To prevent more serious damage to
the vehicle:
.
Reduce vehicle speed.
. Avoid hard accelerations.
. Avoid steep uphill grades.
If the light continues to flash, find a
safe place to stop and park the
vehicle. Turn the vehicle off, wait at
least 10 seconds, and restart the
engine. If the light is still flashing,
follow the previous steps and see
your dealer for service as soon as
possible.
Light On Steady
An emission control system
malfunction has been detected on
the vehicle. Diagnosis and service
might be required.
See the owner manual for more
information.

Chevrolet Impala Bi-Fuel (Gasoline/CNG) Supplement (GMNA-Localizing-U.
S/Canada-9087624) - 2016 - CRC - 8/17/15
Instruments and Controls 5
Low Fuel Warning Light
This light is near the fuel gauge and
comes on briefly when the ignition is
turned on as a check to show it is
working.
It also comes on when the fuel tank
is low on the fuel that is in operation
(gasoline or CNG).
Information Displays
Driver Information
Center (DIC)
The DIC displays are shown in the
center of the instrument cluster in
the Info app. A bi-fuel vehicle will
have the following additional DIC
info pages.
DIC Info Pages
Fuel Level :While operating on
CNG, the gasoline fuel level can be
viewed in the DIC.
CNG Fuel Level : While operating
on gasoline, the CNG fuel level can
be viewed in the DIC.
Fuel Range : Displays the
approximate distances the vehicle
can be driven with gasoline and
CNG without refueling. A total
distance with both gasoline and CNG distances combined is also
displayed. LOW will be displayed
when the vehicle is low on fuel. The
fuel range estimate is based on an
average of the vehicle’s current fuel
economy.
Average Fuel Economy (AFE) :
Located in the Trip A page of the
DIC, the AFE is shown for the fuel
that is in operation. The value
shown is the average for the fuel
used since the last Trip A reset
while running on that fuel. If no reset
occurs, the AFE value for each fuel
will continually recalculate the
average from the last reset.

Chevrolet Impala Bi-Fuel (Gasoline/CNG) Supplement (GMNA-Localizing-U.
S/Canada-9087624) - 2016 - CRC - 8/17/15
8 Driving and Operating
Cold Weather Starting
If the outside temperature is below
2 °C (35 °F), the engine may start on
gasoline when CNG is selected.
After starting on gasoline, the
vehicle will automatically transition
to CNG operation after a set amount
of warm-up time.
Using the engine heater,
if equipped, may make it easier to
start. See“Engine Heater” in the
owner manual.
. Turn off all electrical
accessories.
. Do not hold the ignition switch in
START for more than
15 seconds.
Caution
If you add electrical parts or
accessories, you could change
the way the engine operates. Any
resulting damage would not be
covered by the vehicle warranty.
See “Add-On Electrical
Equipment” in the owner manual.
Ride Control Systems
Traction Control/
Electronic Stability
Control
This vehicle has Traction Control
System (TCS) and StabiliTrak®
electronic stability control systems.
These systems are enabled
automatically and StabiliTrak cannot
be turned off. To turn off TCS, see
“Traction Control/Electronic Stability
Control”in the owner manual.
Fuel
If a fuel leak is suspected, see Fuel
System Leak 014.
. If the vehicle runs out of CNG or
gasoline, it will automatically
switch to the other fuel system,
if there is fuel.
. If it takes unusually long to fill
the CNG cylinder, the fuel fill
receptacle may be clogged.
Contact your dealer for
inspection and/or replacement.
See “Fuel Filling Problems” in
Filling the Tank (CNG) 09.
This vehicle is designed to operate
on gasoline or CNG and has a
gasoline tank and a CNG fuel
storage system. See “Fuel”in the
owner manual for gasoline
information.
The general marketplace fuel quality
of CNG (for motor vehicles) in the
state of California should be in
compliance with Title 13 California
Code of Regulations, Section
2292.5. The remaining regions of
North America do not employ
regulated CNG fuel quality

Chevrolet Impala Bi-Fuel (Gasoline/CNG) Supplement (GMNA-Localizing-U.
S/Canada-9087624) - 2016 - CRC - 8/17/15
Driving and Operating 9
standards for general marketplace
vehicle usage; however, CNG is
available at both private and public
filling stations. We recommend use
of CNG that meets or exceeds SAE
J1616 specifications for fuel
composition and cleanliness. See
Filling the Tank (CNG)09.
Caution
Using below standard CNG fuel
quality may cause damage to the
CNG fuel system. Use only CNG
fuel meeting recommended CNG
fuel standards.
The main component of CNG is
methane, a highly flammable,
colorless gas. An odorant has been
added for detection through smell.
The smell is similar to that of rotten
eggs. The CNG in the vehicle is
stored under high pressure
(maximum 24 800kPa at 21 °C/
3,600 psig at 70 °F). Gas should
never be smelled unless it occurs
briefly during refueling. If gas is
smelled or a hissing sound is heard
at any other time, park in a well ventilated outdoor open area, shut
down the vehicle, and have it
serviced.
It may be possible to hear the fuel
flowing while the engine is running if
standing close to the pipework or
various fuel system components
(regulator, filter). This is normal and
should not be confused with a
hissing sound at fittings that may
indicate a fuel leak. If you suspect a
fuel leak, follow the instructions
under
Fuel System Leak 014.
Fuel Selector Switch
The fuel selector switch is on the
instrument panel left of the steering
wheel. When the ignition is in ON/
RUN, press
0to select between
gasoline and CNG. The indicator
light in the fuel selector switch
comes on when the vehicle is
running on CNG.
Certain conditions must be met in
order to switch between gasoline
and CNG. The vehicle will start up
on the last fuel that was selected.
When the fuel selector switch is
pressed, the indicator light will flash
during a fuel transition. If the fuel
transition is unsuccessful, the DIC
will display FUEL MODE
UNAVAILABLE. See Fuel System
Messages 06.
Filling the Tank (CNG)
{Warning
CNG is flammable and highly
explosive. You could be killed or
seriously injured if leaking natural
(Continued)

Chevrolet Impala Bi-Fuel (Gasoline/CNG) Supplement (GMNA-Localizing-U.
S/Canada-9087624) - 2016 - CRC - 8/17/15
Driving and Operating 11
fill station as soon as it is full,
unless an auto shutoff feature
is used.
{Warning
If CNG tanks are filled to a higher
pressure than recommended and
then exposed to a much higher
ambient temperature
environment, expansion of the
gas caused by the temperature
change may cause pressure relief
devices on the vehicle CNG
tank(s) to release gas, as
designed. If an ignition source is
present, this could create a risk of
fire or explosion. If there is any
possibility that the tank has been
over pressurized, take steps to
relieve the excess pressure, such
as by driving or running the
vehicle in an outdoor open area
to remove some fuel.Make sure that your CNG vehicle is
properly maintained and repaired to
avoid elevated temperatures
surrounding the tank, since elevated
temperatures in the area of the tank
could also raise the CNG pressure
in the tank.
Consult materials available from
NGVAmerica - http://www.ngvc.org
and the Clean Vehicle
Education Foundation -
http://www.cleanvehicle.org on CNG
fueling stations for more information.
Ambient Temperature / Maximum
CNG Fill Pressure Compensation
Chart
To avoid the risk of fire or explosion
if an ignition source were present,
do not fill above the pressure level
that corresponds to the lowest
ambient temperature expected
during fueling.
Service Pressure 24 800 kPa
(3,600 psig) at 21 °C (70 °F).

Chevrolet Impala Bi-Fuel (Gasoline/CNG) Supplement (GMNA-Localizing-U.
S/Canada-9087624) - 2016 - CRC - 8/17/15
14 Driving and Operating
Pressure Relief Devices
The CNG tank has pressure relief
devices that are designed to release
pressure if the CNG tank is
overheated or over pressurized.
If a pressure relief device releases
CNG, the CNG tank will be emptied
and will switch to gasoline,
if gasoline is available. A loud
rushing noise may be heard when
CNG is released.
In Case of a CNG Leak
If a CNG fuel leak is suspected, see
Fuel System Leak014.
Fuel System Leak
{Warning
Fuel vapors and fuel fires burn
violently and can cause injury or
death.
. Keep all smoking materials
and sources of ignition away
from the fuel system
components.
(Continued)
Warning (Continued)
.CNG is non-toxic but the
vapors are lighter than air
and can cause oxygen
depletion if they are
enclosed in a confined
space. Make sure there is
adequate ventilation and
use extreme caution if a
leak is suspected.
{Warning
If you smell a persistent natural
gas odor or hear a continual
hissing sound, there could be a
CNG leak. If the gas is
accidentally ignited, you or others
could be seriously injured or
killed. Do not start the engine or
drive the vehicle. Have the
vehicle towed to an authorized
GM dealer for service. A slight natural gas odor may be
detected for a few moments after
refueling. This is normal. You should
not be able to smell natural gas at
any other time. If you do, or if you
hear a hissing sound, the fuel
system may have a leak.
If natural gas is smelled or a hissing
sound is heard:
1. Park the vehicle in an outdoor open area and apply the
parking brake. Keep heat,
sparks, and flame away. Open
all the vehicle doors for
ventilation.
2. Turn the ignition to LOCK/OFF. Do not start the engine, refuel,
or drive the vehicle.
3. The manual shutoff is on the driver side of the vehicle in
front of the rear tire. See Fuel
System Components 017.

Chevrolet Impala Bi-Fuel (Gasoline/CNG) Supplement (GMNA-Localizing-U.
S/Canada-9087624) - 2016 - CRC - 8/17/15
20 Vehicle Care
Appearance Care
Exterior Care
Finish Damage
{Warning
Heating the vehicle to above 82 °
C (180 °F) may damage the
Compressed Natural Gas (CNG)
tanks and may cause the fuel
pressure relief device to open and
release CNG. If an ignition source
is present, this could create a risk
of fire or explosion.
CNG tank(s) must be drained by
a qualified technician prior to heat
curing a painted body repair.