2016 CHEVROLET IMPALA service indicator

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
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
Index 27
IndexA
Accessories and Modifications . . . 16
Appearance CareExterior . . . . . . . . . . . . . . . . . . . . . . . . . 20
B
Battery - North America . . . . . . . . . . 19
C
California Proposition65 Warning . . . . . . . . . . . . . . . . . . . . . 19
Canadian Vehicle Owners . . . . . . . . 2
Capacities and Specifications . . . . 26
Check Malfunction Indicator EngineLight . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Cleaning Exterior Care . . . . . . . . . . . . . . . . . . . 20
Components Fuel System . . . . . . . . . . . . . . . . . . . . 17
Control
Traction and ElectronicStability . . . . . . . . . . . . . . . . . . . . . . . . 8
D
Driver Information Center (DIC) . . . 5
DrivingVehicle Load Limits . . . . . . . . . . . . . . 7
E
EngineCheck and Service EngineSoon Light . . . . . . . . . . . . . . . . . . . . . 4
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . 7
F
Flat Tire
Changing . . . . . . . . . . . . . . . . . . . . . . . 19
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Filling the Tank . . . . . . . . . . . . . . . . . . 9
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Low Fuel Warning Light . . . . . . . . . . 5
System Messages . . . . . . . . . . . . . . . 6
Fuel System Components . . . . . . . 17
Fuel System Leak . . . . . . . . . . . . . . . 14
G
Gauges
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
I
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . 19

Chevrolet Impala Bi-Fuel (Gasoline/CNG) Supplement (GMNA-Localizing-U.
S/Canada-9087624) - 2016 - CRC - 8/17/15
28 Index
L
LampsMalfunction Indicator . . . . . . . . . . . . 4
Leak Fuel System . . . . . . . . . . . . . . . . . . . . 14
Lights Low Fuel Warning . . . . . . . . . . . . . . . 5
Low Fuel Warning Light . . . . . . . . . . . 5
M
Maintenance Schedule . . . . . . . . . . 21
Malfunction Indicator Lamp . . . . . . . 4
Messages Fuel System . . . . . . . . . . . . . . . . . . . . . 6
N
Natural GasVehicle Service Records . . . . . . . . 23
Natural Gas Vehicle (CNG) Service Records . . . . . . . . . . . . . . . 23
P
Proposition 65 Warning,California . . . . . . . . . . . . . . . . . . . . . . . 19
S
ServiceAccessories andModifications . . . . . . . . . . . . . . . . . . 16
Doing Your Own Work . . . . . . . . . . 16 Service (cont'd)
Engine Soon Light . . . . . . . . . . . . . . . 4
Service and Maintenance Natural Gas Vehicle (CNG)
Service Records . . . . . . . . . . . . . . 23
Specifications and Capacities . . . . 26
Starting the Engine . . . . . . . . . . . . . . . 7
Supplement Using . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
T
Tires
Changing . . . . . . . . . . . . . . . . . . . . . . . 19
Towing
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Traction Control/Electronic Stability Control . . . . . . . . . . . . . . . . . 8
Trailer Towing . . . . . . . . . . . . . . . . . . . . . . . . . . 15
U
Using This Supplement . . . . . . . . . . . 2
V
Vehicle
Canadian Owners . . . . . . . . . . . . . . . 2
Load Limits . . . . . . . . . . . . . . . . . . . . . . 7