2015 CHEVROLET CORVETTE GRAND SPORT engine overheat

Black plate (1,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
Vehicle Care 10-1
Vehicle Care
General Information
General Information . . . . . . . . . . 10-2
California Proposition65 Warning . . . . . . . . . . . . . . . . . 10-2
California Perchlorate Materials Requirements . . . . 10-2
Accessories and Modifications . . . . . . . . . . . . . . . 10-2
Lifting the Vehicle . . . . . . . . . . . . 10-3
Vehicle Checks
Doing Your Own Service Work . . . . . . . . . . . . . . . 10-5
Hood . . . . . . . . . . . . . . . . . . . . . . . . 10-6
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . 10-7
Engine Oil . . . . . . . . . . . . . . . . . . 10-12
Engine Oil Life System . . . . . 10-18
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . 10-19
Manual Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . 10-19
Hydraulic Clutch . . . . . . . . . . . . 10-19
Engine Air Cleaner/Filter . . . . 10-20
Cooling System (Engine) . . . 10-22 Cooling System (Aero
Panel) . . . . . . . . . . . . . . . . . . . . . 10-23
Engine Coolant . . . . . . . . . . . . . 10-24
Engine Overheating . . . . . . . . 10-27
Washer Fluid . . . . . . . . . . . . . . . 10-28
Brakes . . . . . . . . . . . . . . . . . . . . . 10-29
Brake Fluid . . . . . . . . . . . . . . . . . 10-32
Battery . . . . . . . . . . . . . . . . . . . . . 10-33
Rear Axle . . . . . . . . . . . . . . . . . . 10-34
Starter Switch Check . . . . . . . 10-35
Automatic Transmission Shift Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . 10-35
Park Brake and P (Park) Mechanism Check . . . . . . . . 10-36
Wiper Blade Replacement . . . . . . . . . . . . . . 10-36
Windshield Replacement . . . 10-37
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . 10-37
Bulb Replacement
Bulb Replacement . . . . . . . . . . 10-37
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . 10-37
LED Lighting . . . . . . . . . . . . . . . 10-38
License Plate Lamp . . . . . . . . 10-38
Replacement Bulbs . . . . . . . . . 10-38
Electrical System
Electrical System Overload . . . . . . . . . . . . . . . . . . 10-39
Fuses . . . . . . . . . . . . . . . . . . . . . . 10-39
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . 10-39
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . 10-43
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . 10-46
Winter Tires . . . . . . . . . . . . . . . . 10-47
Run-Flat Tires . . . . . . . . . . . . . . 10-48
Low-Profile Tires . . . . . . . . . . . 10-49
Competition OrientedTires . . . . . . . . . . . . . . . . . . . . . . 10-49
Summer Tires . . . . . . . . . . . . . . 10-50
Tire Sidewall Labeling . . . . . . 10-51
Tire Designations . . . . . . . . . . . 10-52
Tire Terminology and Definitions . . . . . . . . . . . . . . . . 10-53
Tire Pressure . . . . . . . . . . . . . . . 10-55
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . 10-57
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . 10-57
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . 10-58
Tire Inspection . . . . . . . . . . . . . . 10-61

Black plate (24,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
10-24 Vehicle Care
To remove the aero panel and
bracket:
1. Press up on the two indents atthe bottom and lift the aero
panel off the bracket.
2. Unscrew the two fasteners that
secure the bracket.
3. Gently pull the bracket away from the grille.
To replace the bracket and aero
panel:
1. Position the bracket over the grille.
2. Secure the bracket by pushing the two fasteners into place.
3. Snap the aero panel into place.
Engine Coolant
The cooling system in the vehicle is
filled with DEX-COOL®engine
coolant. See Recommended Fluids
and Lubricants on page 11-12. The
fluid requires changing at certain
intervals. See Maintenance
Schedule on page 11-2.
The following explains the cooling
system and how to check and add
coolant when it is low. If there is a
problem with engine overheating,
see Engine Overheating on
page 10-27.
What to Use
{Warning
Adding only plain water or some
other liquid to the cooling system
can be dangerous. Plain water
and other liquids, can boil before
the proper coolant mixture will.
The vehicle's coolant warning
system is set for the proper
(Continued)

Black plate (25,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
Vehicle Care 10-25
Warning (Continued)
coolant mixture. With plain water
or the wrong mixture, the engine
could get too hot but you would
not get the overheat warning. The
engine could catch fire and you or
others could be burned. Use a
mixture of 40% DEX-COOL
coolant and 60% clean, drinkable
water.
Use a mixture of 40% DEX-COOL
coolant and 60% clean, drinkable
water. If using this mixture, nothing
else needs to be added. This
mixture:
.Gives freezing protection down
to −28°C (−18°F), outside
temperature.
.Gives boiling protection up to
129°C (265°F), engine
temperature.
.Protects against rust and
corrosion.
.Will not damage aluminum parts.
.Helps keep the proper engine
temperature.
{Caution
If improper coolant mixture,
inhibitors, or additives are used in
the vehicle cooling system, the
engine could overheat and be
damaged. Too much water in the
mixture can freeze and crack
engine cooling parts. The repairs
would not be covered by the
vehicle warranty. Use only the
proper mixture of engine coolant
for the cooling system. See
Recommended Fluids and
Lubricants on page 11-12.
Never dispose of engine coolant by
putting it in the trash, pouring it on
the ground, or into sewers, streams,
or bodies of water. Have the coolant
changed by an authorized service
center, familiar with legal
requirements regarding used coolant disposal. This will help
protect the environment and your
health.
If ambient temperatures are
anticipated below
−28°C (−18°F),
make sure a proper mixture ratio of
50% DEX-COOL coolant and 50%
clean, drinkable water is used.
Checking Coolant
The vehicle must be on a level
surface when checking the coolant
level.
Check to see if coolant is visible in
the coolant surge tank. If the coolant
inside the coolant surge tank is
boiling, do not do anything else until
it cools down. If coolant is visible
but the coolant level is not at or
above the cold fill line, add a
mixture of 40% DEX-COOL coolant
and 60% clean, drinkable water at
the coolant recovery tank, but be
sure the cooling system is cool
before this is done. See Engine
Overheating on page 10-27.

Black plate (27,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
Vehicle Care 10-27
4. With the coolant surge tankpressure cap off, start the
engine and let it run until the
upper radiator hose can be felt
getting hot. Any time during this
procedure, watch out for the
engine cooling fan.
By this time, the coolant level
inside the coolant surge tank
may be lower. If the level is
lower, add more of the proper
mixture to the coolant surge tank
until the level stabilizes at the
cold fill line on the coolant
surge tank.
5. Replace the pressure cap tightly. Check the level in the surge tank
when the system has cooled
down. If the coolant is not at the
proper level, repeat Steps 1−4,
then reinstall the pressure cap.
If the coolant is not at the proper
level when the system cools
down again, see the dealer.{Caution
If the pressure cap is not tightly
installed, coolant loss and
possible engine damage may
occur. Be sure the cap is properly
and tightly secured.
Engine Overheating
The vehicle has several indicators
to warn of engine overheating.
There is an engine coolant
temperature gauge on the
instrument cluster. See Engine
Coolant Temperature Gauge on
page 5-15. The vehicle may also
display a message on the Driver
Information Center (DIC). See
Engine Cooling System Messages
on page 5-37.
If the decision is made not to lift the
hood but to get service help right
away, see Roadside Assistance
Program on page 13-5. If the decision is made to lift the
hood, make sure the vehicle is
parked on a level surface.
Then check to see if the engine
cooling fan is running. If the engine
is overheating, the fan should be
running. If it is not, do not continue
to run the engine and have the
vehicle serviced.{Caution
Running the engine without
coolant may cause damage or a
fire. Vehicle damage would not be
covered by the vehicle warranty.
If Steam Is Coming from the
Engine
{Warning
Steam from an overheated engine
can burn you badly, even if you
just open the hood. Stay away
(Continued)

Black plate (28,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
10-28 Vehicle Care
Warning (Continued)
from the engine if you see or hear
steam coming from it. Just turn it
off and get everyone away from
the vehicle until it cools down.
Wait until there is no sign of
steam or coolant before you open
the hood.
If you keep driving when the
engine is overheated, the liquids
in it can catch fire. You or others
could be badly burned. Stop the
engine if it overheats, and get out
of the vehicle until the engine
is cool.
If No Steam Is Coming from
the Engine
If an engine overheat warning is
displayed but no steam can be seen
or heard, the problem may not be
too serious. Sometimes the engine
can get a little too hot when the
vehicle:
.Climbs a long hill on a hot day.
.Stops after high-speed driving.
.Idles for long periods in traffic.
If the overheat warning is displayed
with no sign of steam:
1. Turn the air conditioning off.
2. Turn the heater on to the highest temperature and to the highest
fan speed. Open the windows as
necessary.
3. When it is safe to do so, pull off the road, shift to P (Park) or
N (Neutral) and let the
engine idle.
If the temperature overheat gauge is
no longer in the shaded area or an
overheat warning no longer displays, the vehicle can be driven.
Continue to drive the vehicle slowly
for about 10 minutes. Keep a safe
vehicle distance from the vehicle in
front. If the warning does not come
back on, continue to drive normally
and have the cooling system
checked for proper fill and function.
If the warning continues, pull over,
stop, and park the vehicle
right away.
If there is no sign of steam, idle the
engine for three minutes while
parked. If the warning is still
displayed, turn off the engine until it
cools down.
Washer Fluid
What to Use
When the vehicle needs windshield
washer fluid, be sure to read the
manufacturer instructions before
use. If the vehicle will be operating
in an area where the temperature

Black plate (39,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
Vehicle Care 10-39
Electrical System
Electrical System
Overload
The vehicle has fuses to protect
against an electrical system
overload. Fuses also protect power
devices in the vehicle.
Replace a bad fuse with a new one
of the identical size and rating.
If there is a problem on the road and
a fuse needs to be replaced, there
are some spare fuses and a fuse
puller in the Instrument Panel Fuse
Block. The same amperage fuse
can also be borrowed. Choose
some feature of the vehicle that is
not needed to use and replace it as
soon as possible.
Windshield Wipers
If the wiper motor overheats due to
heavy snow or ice, the windshield
wipers will stop until the motor cools
and will then restart.Although the circuit is protected
from electrical overload, overload
due to heavy snow or ice may
cause wiper linkage damage.
Always clear ice and heavy snow
from the windshield before using the
windshield wipers.
If the overload is caused by an
electrical problem and not snow or
ice, be sure to get it fixed.
Fuses
The wiring circuits in the vehicle are
protected from short circuits by
fuses. This greatly reduces the
chance of fires caused by electrical
problems.
Look at the silver-colored band
inside the fuse. If the band is broken
or melted, replace the fuse. Be sure
you replace a bad fuse with a new
one of the identical size and rating.
Fuses of the same amperage can
be temporarily borrowed from
another fuse location, if a fuse goes
out. Replace the fuse as soon as
you can.
Engine Compartment
Fuse Block
There is one fuse block in the
engine compartment on the
passenger side of the vehicle. See
Engine Compartment Overview on
page 10-7
for more information on
location.
{Caution
Spilling liquid on any electrical
component on the vehicle may
damage it. Always keep the
covers on any electrical
component.

Black plate (4,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
i-4 INDEX
Electrical SystemEngine Compartment
Fuse Block . . . . . . . . . . . . . . . . 10-39
Fuses . . . . . . . . . . . . . . . . . . . . . . 10-39
Overload . . . . . . . . . . . . . . . . . . . 10-39
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . 10-43
Emergency OnStar
®. . . . . . . . . . . . . . . . . . . . . . 14-3
Engine Air Cleaner/Filter . . . . . . . . . . . 10-20
Check and Service Engine
Soon Light . . . . . . . . . . . . . . . . . . 5-18
Compartment Overview . . . . . . . 10-7
Coolant . . . . . . . . . . . . . . . . . . . . . 10-24
Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . 5-15
Coolant Temperature Warning Light . . . . . . . . . . . . . . . 5-23
Cooling System . . . . . . 10-22, 10-23
Cooling System Messages . . . 5-37
Drive Belt Routing . . . . . . . . . . . . 12-4
Exhaust . . . . . . . . . . . . . . . . . . . . . . 9-26
Oil Life System . . . . . . . . . . . . . 10-18
Oil Messages . . . . . . . . . . . . . . . . . 5-37
Overheating . . . . . . . . . . . . . . . . 10-27 Engine (cont'd)
Power Messages . . . . . . . . . . . . . 5-38
Pressure Light . . . . . . . . . . . . . . . . 5-24
Running While Parked . . . . . . . . 9-26
Starting . . . . . . . . . . . . . . . . . . . . . . . 9-21
Entry Lighting . . . . . . . . . . . . . . . . . . . 6-6
Event Data Recorders . . . . . . . . 13-14
Exit Lighting . . . . . . . . . . . . . . . . . . . . 6-6
Extender, Safety Belt . . . . . . . . . . 3-13
Exterior Lamp Controls . . . . . . . . . 6-1
Exterior Lamps Off Reminder . . . 6-2
Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
F
FeaturesMemory . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Filter, Engine Air Cleaner . . . . . . . . . 10-20
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 6-2
Flashers, Hazard Warning . . . . . . 6-4
Flat Tire . . . . . . . . . . . . . . . . . . . . . . 10-69
Floor Mats . . . . . . . . . . . . . . . . . . . . 10-91 Fluid
Automatic Transmission . . . . 10-19
Brakes . . . . . . . . . . . . . . . . . . . . . . 10-32
Washer . . . . . . . . . . . . . . . . . . . . . 10-28
Folding Mirrors . . . . . . . . . . . . . . . . 2-20
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . 13-12
Front Air Dam . . . . . . . . . . . . . . . . . 9-19
Front Seats Heated and Ventilated . . . . . . . . . 3-7
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-53
Additives . . . . . . . . . . . . . . . . . . . . . 9-54
Economy Driving . . . . . . . . . . . . . 1-21
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . 9-56
Filling the Tank . . . . . . . . . . . . . . . 9-55
Foreign Countries . . . . . . . . . . . . 9-54
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 5-13
Low Fuel Warning Light . . . . . . . 5-25
Management, Active . . . . . . . . . . 9-25
Requirements, California . . . . . 9-54
System Messages . . . . . . . . . . . . 5-38

Black plate (8,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
i-8 INDEX
OilEngine . . . . . . . . . . . . . . . . . . . . . . 10-12
Engine Oil Life System . . . . . 10-18
Messages . . . . . . . . . . . . . . . . . . . . 5-37
Pressure Light . . . . . . . . . . . . . . . . 5-24
Older Children, Restraints . . . . . 3-26
Online Owner Center . . . . . . . . . . 13-4
OnStar . . . . . . . . . . . . . . . . . . . . . . . 13-15
OnStar
®
System, In Brief . . . . . . . . . . . . . . 1-22
OnStar®Additional
Information . . . . . . . . . . . . . . . . . . . 14-6
OnStar
®Connections . . . . . . . . . . 14-4
OnStar®Emergency . . . . . . . . . . . 14-3
OnStar®Navigation . . . . . . . . . . . . 14-3
OnStar®Overview . . . . . . . . . . . . . 14-1
OnStar®Security . . . . . . . . . . . . . . 14-3
OnStar®Vehicle
Diagnostics . . . . . . . . . . . . . . . . . . 14-6
Ordering Service Publications . . . . . . . . .13-11
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Overheating, Engine . . . . . . . . . . 10-27
P
Panel, Roof . . . . . . . . . . . . . . . . . . . . 2-24
Park Shifting Into . . . . . . . . . . . . . . . . . . . 9-23
Shifting Out of . . . . . . . . . . . . . . . . 9-24
Parking . . . . . . . . . . . . . . . . . . . . . . . . 9-25 Brake and P (Park)
Mechanism Check . . . . . . . . 10-36
Over Things That Burn . . . . . . . 9-25
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . 5-17
Passenger Compartment Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Passenger Sensing System . . . 3-20
Perchlorate Materials Requirements, California . . . . . 10-2
Performance Data Recorder (PDR) . . . . . . . . . . . . . . . 7-1
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . 5-45
Power Door Locks . . . . . . . . . . . . . . . . . . . 2-13
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Outlets . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Protection, Battery . . . . . . . . . . . . . 6-6 Power (cont'd)
Retained Accessory (RAP) . . . 9-23
Seat Adjustment . . . . . . . . . . . . . . . 3-2
Windows . . . . . . . . . . . . . . . . . . . . . 2-22
Pregnancy, Using Safety Belts . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Privacy Vehicle Data Recording . . . . . 13-14
Program
Courtesy Transportation . . . . . . 13-7
Proposition 65 Warning, California . . . . . . . . . . . . . . . . . . . . . 10-2
R
Radio FrequencyIdentification (RFID) . . . . . . . . . 13-11
Radio Frequency Statement . . . . . . . . . . . . . . . . . . . 13-12
Reading Lamps . . . . . . . . . . . . . . . . . 6-6
Rear Axle . . . . . . . . . . . . . . . . . . . . . 10-34
Rear Storage . . . . . . . . . . . . . . . . . . . 4-2
Rear Vision Camera (RVC) . . . . 9-51
Rearview Mirrors . . . . . . . . . . . . . . 2-21 Automatic Dimming . . . . . . . . . . . 2-21
Reclining Seatbacks . . . . . . . . . . . . 3-3