2011 CHEVROLET VOLT engine

Black plate (27,1)Chevrolet Volt Owner Manual - 2011
Driving and Operating 9-27
Sport Mode
Sport Mode provides more
responsive acceleration than
Normal Mode, but can reduce
efficiency. Use Normal Mode
whenever possible.
Press the DRIVE MODE button to
select Sport Mode.
Press the DRIVE MODE button
again to return to Normal Mode
and it becomes active after
three seconds.
The Sport light comes on when
Sport Mode is selected. SeeSport
Mode Light on page 5‑26.
Each time the vehicle is started,
it will return to Normal Mode.
Mountain Mode
Mountain Mode should be selected
at the beginning of a trip before
climbing steep, uphill grades and
when expecting to drive in very
hilly or mountainous terrain.
This mode maintains a reserve
electrical charge of the high voltage
battery to provide better grade
climbing performance. While driving
in Mountain Mode, the vehicle will
have less responsive acceleration. Mountain Mode will not change
normal vehicle braking performance
for steep downhill grades. See
Hill
and Mountain Roads on page 9‑10
and Electric Drive Unit on
page 9‑32.
Press the DRIVE MODE button
to select Mountain Mode. If steep
hill driving is expected, it is
recommended to select Mountain
Mode at least 20 minutes before
driving on steep grades. This will
allow the vehicle time to build a
sufficient battery charge reserve.
The engine may run when Mountain
Mode is selected. If Mountain
Mode is entered before four bars
of battery charge, the engine will
run at a higher speed to build
battery charge reserve. If Mountain
Mode is entered above four bars
of battery charge reserve, the
estimated electric range will
adjust accordingly.

Black plate (28,1)Chevrolet Volt Owner Manual - 2011
9-28 Driving and Operating
Press the Drive Mode button again
to return to Normal Mode and it
becomes active in three seconds.
If Mountain Mode is not selected
for these conditions, propulsion
power may be reduced and the
engine speed may increase. See
Propulsion Power Messages on
page 5‑50.
The vehicle returns to Normal Mode
at each start to maintain a smaller
battery charge reserve for normal
driving.
Out of Fuel/Engine
Unavailable
If the vehicle runs out of fuel,
or the engine will not start due
to a malfunction, the vehicle can
continue to be driven in Electric
Mode. The vehicle will have
less responsive acceleration.DIC messages indicate reduced
propulsion power, that the engine
is not available, and the need for
fuel or service.
Once the vehicle is refueled, or the
malfunction is corrected, the engine
will start the next time the vehicle is
turned on to perform a self test, and
DIC messages will not be displayed.
Once the engine starts successfully,
normal operation will continue in
either Electric or Extended Range
Mode. The engine will stop running
after the self test is completed,
and based on the current mode
of operation. See
Fuel System
Messages on page 5‑48 and
Service Vehicle Messages on
page 5‑51.
Maintenance Modes
Engine Maintenance Mode (EMM)
Engine Maintenance Mode
(EMM) runs the engine to keep
it in good working condition after
approximately six weeks of no or
very limited engine operation. EMM
will force the engine to run, even
if there is a charge to power the
vehicle. When EMM is needed,
the EMM Request screen appears
on the center stack display at
vehicle start.
If Yes is selected, EMM will begin.
The engine will run for a set
amount of time without turning off.

Black plate (29,1)Chevrolet Volt Owner Manual - 2011
Driving and Operating 9-29
During EMM, a DIC message
displays to show the
EMM percentage complete.
If No is selected, the EMM Request
screen will appear when the vehicle
is next started. The EMM request
can be delayed for only one day.
If the EMM request was delayed
for one day, EMM will automatically
start the engine at the next vehicle
start. An EMM Notification screen
will appear in the center stack
display.
If the vehicle shuts off during EMM,
it will restart the next time the
vehicle is driven. A message
displays to indicate that EMM
is active.
If EMM is required and the fuel level
is low, EMM may eventually empty
the fuel tank if fuel is not added.
This will result in reduced, or no
power. An adequate fuel level must
be maintained in the vehicle to keep
it operational. SeePropulsion Power
Messages on page 5‑50.Fuel Maintenance Mode (FMM)
Fuel Maintenance Mode (FMM)
tracks average fuel age. Old
fuel can cause engine problems.
If low engine usage causes average
fuel age to exceed approximately
one year, FMM will run the engine to
use up the old fuel. The engine will
run until enough fresh fuel is added
to bring the average fuel age into
an acceptable range. Allowing more
old fuel to be used up by FMM and
adding a larger amount of fresh fuel
will maximize the length of time
before another fuel maintenance
mode is needed. During FMM the
engine may turn on and off.

Black plate (30,1)Chevrolet Volt Owner Manual - 2011
9-30 Driving and Operating
When FMM is needed, the FMM
Request screen appears on the
center stack display at vehicle start.
If Yes is selected, FMM will begin.
FMM will automatically continue at
each vehicle start until fresh fuel is
added.
If No is selected, the FMM Request
screen will appear when the vehicle
is next started. The FMM request
can be delayed for only one day.If the FMM request was delayed for
one day, FMM will start at the next
vehicle start and display the FMM
Notification screen on the center
stack display.
If FMM is required and the fuel level
is low, FMM may eventually empty
the fuel tank if fuel is not added.
This will result in reduced, or no
power. An adequate fuel level must
be maintained in the vehicle to keep
it operational. See
Propulsion Power
Messages on page 5‑50.
Engine Exhaust
{WARNING
Engine exhaust contains Carbon
Monoxide (CO) which cannot be
seen or smelled. Exposure to CO
can cause unconsciousness and
even death.
Exhaust may enter the vehicle if:
.The engine is running in
Extended Range Mode in
areas with poor ventilation
(parking garages, tunnels,
or deep snow that may block
underbody airflow or tail
pipes).
.The exhaust smells or
sounds strange or different.
.The exhaust system leaks
due to corrosion or damage.
.The vehicle exhaust system
has been modified, damaged,
or improperly repaired.
(Continued)

Black plate (31,1)Chevrolet Volt Owner Manual - 2011
Driving and Operating 9-31
WARNING (Continued)
.There are holes or openings
in the vehicle body from
damage or aftermarket
modifications that are not
completely sealed.
If unusual fumes are detected or
if it is suspected that exhaust is
coming into the vehicle:
.Drive it only with the windows
completely down.
.Have the vehicle repaired
immediately.
Never park with the engine
running in Extended Range Mode
in an enclosed area such as a
garage or a building that has no
fresh air ventilation.
Running the Vehicle
While Parked
It is better not to park with the
propulsion system on. But if you
ever have to, here are some things
to know.
{WARNING
Leaving the engine running
in Extended Range Mode
in an enclosed area with poor
ventilation is dangerous. Engine
exhaust may enter the vehicle.
Engine exhaust contains Carbon
Monoxide (CO) which cannot be
seen or smelled. It can cause
unconsciousness and even
death. Never run the engine
in an enclosed area that has no
fresh air ventilation. For more
information, see Engine Exhaust
on page 9‑30.
{WARNING
It can be dangerous to get out of
the vehicle if the electric drive unit
shift lever is not fully in P (Park)
with the parking brake firmly set.
The vehicle can roll. Do not leave
the vehicle with the propulsion
system on unless you have to.
If you have left the propulsion
system on, the vehicle can move
suddenly. You or others could be
injured. To be sure the vehicle
will not move, even when you are
on level ground, always set the
parking brake and move the shift
lever to P (Park).
Follow the proper steps to
be sure the vehicle will not move.
See Shifting Into Park on
page 9‑22.

Black plate (57,1)Chevrolet Volt Owner Manual - 2011
Driving and Operating 9-57
The following are the minimum
requirements for circuits used to
charge this vehicle:
.120V/15Amp
.240V/20Amp
Charging equipment with a
rating of at least 240V/20Amp
will provide the fastest charging
time to recharge the high voltage
battery. 240V/40Amp circuits
provide flexibility for future vehicle
charging needs. Contact your
dealer for more information.
Do not use non‐grounded electrical
plug adapters.
Notice: Do not use portable or
stationary backup generating
equipment to charge the vehicle.
This may cause damage to the
vehicle's charging system. Only
charge the vehicle from utility
supplied power.
Fuel
Use of the recommended fuel
is an important part of the proper
maintenance of this vehicle.
To help keep the engine clean
and maintain optimum vehicle
performance, we recommend
the use of gasoline advertised as
TOP TIER Detergent Gasoline.
Look for the TOP TIER label on
the fuel pump to ensure gasoline
meets enhanced detergency
standards developed by auto
companies. A list of marketers
providing TOP TIER Detergent
Gasoline can be found at
www.toptiergas.com.
Use premium unleaded gasoline
with a posted octane rating of 91
or higher. If the octane is less than
91, you could damage the engine.
If heavy knocking is heard when
using gasoline rated at 91 octane
or higher, the engine needs service.

Black plate (59,1)Chevrolet Volt Owner Manual - 2011
Driving and Operating 9-59
Fuel Additives
To provide cleaner air, all gasolines
in the United States are now
required to contain additives that
help prevent engine and fuel system
deposits from forming, allowing the
emission control system to work
properly. In most cases, nothing
should have to be added to the fuel.
However, some gasolines contain
only the minimum amount of
additive required to meet U.S.
Environmental Protection Agency
regulations. To help keep fuel
injectors and intake valves clean
and avoid problems due to dirty
injectors or valves, look for gasoline
that is advertised as TOP TIERDetergent Gasoline. Look for the
TOP TIER label on the fuel pump
to ensure gasoline meets enhanced
detergency standards developed
by the auto companies. A list of
marketers providing TOP TIER
Detergent Gasoline can be found
at www.toptiergas.com.
For customers who do not use
TOP TIER Detergent Gasoline
regularly, one bottle of GM Fuel
System Treatment PLUS, added
to the fuel tank at every engine oil
change, can help clean deposits
from fuel injectors and intake
valves. GM Fuel System Treatment
PLUS is the only gasoline additive
recommended by General Motors.
It is available at your dealer.Gasolines containing oxygenates,
such as ethers and ethanol,
and reformulated gasolines
might be available in your area.
We recommend that you use these
gasolines, if they comply with the
specifications described earlier.
However, E85 (85% ethanol) and
other fuels containing more than
10% ethanol must not be used in
vehicles that were not designed
for those fuels.
Notice:
This vehicle was not
designed for fuel that contains
methanol. Do not use fuel
containing methanol. It can
corrode metal parts in the fuel
system and also damage plastic
and rubber parts. That damage
would not be covered under the
vehicle warranty.

Black plate (1,1)Chevrolet Volt Owner Manual - 2011
Vehicle Care 10-1
Vehicle Care
General Information
General Information . . . . . . . . . . 10-3
California Proposition65 Warning . . . . . . . . . . . . . . . . . 10-3
California Perchlorate Materials Requirements . . . . 10-3
Accessories and Modifications . . . . . . . . . . . . . . . 10-4
Lifting the Vehicle . . . . . . . . . . . . 10-5
Vehicle Checks
Doing Your Own Service Work . . . . . . . . . . . . . . . 10-8
Hood . . . . . . . . . . . . . . . . . . . . . . . . 10-9
Engine Compartment Overview . . . . . . . . . . . . . . . . . . 10-10
Engine Oil . . . . . . . . . . . . . . . . . . 10-12
Engine Oil Life System . . . . . 10-15
Engine Air Cleaner/Filter . . . . 10-16 Cooling System (Engine) . . . 10-18
Cooling System (High
Voltage Battery) . . . . . . . . . . . 10-19
Cooling System (Power Electronics and Charger
Modules) . . . . . . . . . . . . . . . . . . 10-20
Engine Coolant . . . . . . . . . . . . . 10-21
Engine Overheating . . . . . . . . 10-23
Power Steering Fluid . . . . . . . 10-24
Washer Fluid . . . . . . . . . . . . . . . 10-24
Brakes . . . . . . . . . . . . . . . . . . . . . 10-25
Brake Fluid . . . . . . . . . . . . . . . . . 10-26
Battery . . . . . . . . . . . . . . . . . . . . . 10-28
Propulsion System Start Check . . . . . . . . . . . . . . . . . . . . . 10-29
Electrical Drive Unit Shift Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . 10-30
Park Brake and P (Park) Mechanism Check . . . . . . . . 10-30
Wiper Blade Replacement . . . . . . . . . . . . . . 10-31
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . 10-32
Bulb Replacement
Bulb Replacement . . . . . . . . . . 10-34
Halogen Bulbs . . . . . . . . . . . . . . 10-34
Headlamps . . . . . . . . . . . . . . . . . 10-34
Back-Up Lamps . . . . . . . . . . . . 10-35
License Plate Lamp . . . . . . . . 10-36
Replacement Bulbs . . . . . . . . . 10-37
Electrical System
High Voltage Devices andWiring . . . . . . . . . . . . . . . . . . . . . 10-37
Electrical System Overload . . . . . . . . . . . . . . . . . . 10-37
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . 10-38
Instrument Panel Fuse Block (Left Side) . . . . . . . . . . . . . . . . 10-42
Instrument Panel Fuse Block (Right Side) . . . . . . . . . . . . . . . 10-43
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . 10-45