2018 CHEVROLET CORVETTE C7 engine overheat

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374030) - 2018 - crc - 3/29/17
234 Vehicle Care
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 0236.
The engine coolant surge tank is
toward the rear of the engine
compartment on the passenger side
of the vehicle. See Engine
Compartment Overview 0217. When the engine is cold, the coolant
level should be at the cold fill line on
the coolant surge tank.
When the engine is hot, the level
could be higher than the cold fill
line. If the coolant is below the cold
fill line when the engine is hot, there
could be a leak in the cooling
system.
If the coolant is low, add the coolant
or take the vehicle to your dealer for
service.
How to Add Coolant to the
Coolant Surge Tank
{Warning
Spilling coolant on hot engine
parts can burn you. Coolant
contains ethylene glycol and it will
burn if the engine parts are hot
enough.
{Warning
Steam and scalding liquids from a
hot cooling system are under
pressure. Turning the pressure
cap, even a little, can cause them
to come out at high speed and
you could be burned. Never turn
the cap when the cooling system,
including the pressure cap, is hot.
Wait for the cooling system and
pressure cap to cool.
If coolant is needed, add the proper
DEX-COOL coolant mixture directly
to the surge tank, but be sure the
cooling system is cool before this
is done.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374030) - 2018 - crc - 3/29/17
236 Vehicle Care
To remove the aero panel and
bracket:
Stingray Shown, Grand Sport andZ06 Similar
1. Press up on the two indents at the bottom and lift the aero
panel off the bracket.
Stingray Shown, Grand Sport and
Z06 Similar
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 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 0106.
The vehicle may also display a
message on the Driver Information
Center (DIC).
If the decision is made not to lift the
hood but to get service help right
away, see Roadside Assistance
Program 0320.
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.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374030) - 2018 - crc - 3/29/17
Vehicle Care 237
Caution
Do not run the engine if there is a
leak in the engine cooling system.
This can cause a loss of all
coolant and can damage the
system and vehicle. Have any
leaks fixed right away.
If Steam Is Coming from the
Engine
{Warning
Steam and scalding liquids from a
hot cooling system are under
pressure. Turning the pressure
cap, even a little, can cause them
to come out at high speed and
you could be burned. Never turn
the cap when the cooling system,
including the pressure cap, is hot.
Wait for the cooling system and
pressure cap to 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
may fall below freezing, use a fluid
that has sufficient protection against
freezing.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374030) - 2018 - crc - 3/29/17
Vehicle Care 247
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 maycause 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.
{Danger
Fuses and circuit breakers are
marked with their ampere rating.
Do not exceed the
specified amperage rating when
replacing fuses and circuit
breakers. Use of an oversized
fuse or circuit breaker can result
in a vehicle fire. You and others
could be seriously injured or
killed.
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
0
217 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.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374030) - 2018 - crc - 4/5/17
Index 345
Electrical System (cont'd)Overload . . . . . . . . . . . . . . . . . . . . . 247
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 251
Electronic Stability Control (ESC) Off Light . . . . . . . . . . . . . . . . 113
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . 332
Engine
Air Cleaner/Filter . . . . . . . . . . . . . 229
Check Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . 109
Compartment Overview . . . . . . . 217
Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . 106
Coolant Temperature Warning Light . . . . . . . . . . . . . . . .114
Cooling System . . . . . . . . . . 232, 235
Drive Belt Routing . . . . . . . . . . . . 315
Exhaust . . . . . . . . . . . . . . . . . . . . . . 181
Oil Life System . . . . . . . . . . . . . . . 227
Oil Pressure Light . . . . . . . . . . . . .115
Overheating . . . . . . . . . . . . . . . . . . 236
Power Messages . . . . . . . . . . . . . 123
Running While Parked . . . . . . . . 181
Starting . . . . . . . . . . . . . . . . . . . . . . . 177
Entry Lighting . . . . . . . . . . . . . . . . . . . 140
Event Data Recorders . . . . . . . . . . 328 Exit Lighting . . . . . . . . . . . . . . . . . . . . 140
Extended Parking . . . . . . . . . . . . . . . 180
Extender, Seat Belt . . . . . . . . . . . . . . 68
Exterior Lamp Controls . . . . . . . . . 135
Exterior Lamps Off Reminder . . . 136
Exterior Lighting Battery
Saver . . . . . . . . . . . . . . . . . . . . . . . . . 140
F
Features
Memory . . . . . . . . . . . . . . . . . . . . . . . . . 12
Filter,
Engine Air Cleaner . . . . . . . . . . . 229
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 136
Flashers, Hazard Warning . . . . . . 138
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 275
Floor Mats . . . . . . . . . . . . . . . . . . . . . . 297
Fluid Automatic Transmission . . . . . . 228
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 239
Washer . . . . . . . . . . . . . . . . . . . . . . . 237
Folding Mirrors . . . . . . . . . . . . . . . . . . 43
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . 326
Front Air Dam . . . . . . . . . . . . . . . . . . 174
Front Seats Heated and Ventilated . . . . . . . . . . 62
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206 Additives . . . . . . . . . . . . . . . . . . . . . 207 Fuel (cont'd)
Economy Driving . . . . . . . . . . . . . . . 24
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . 209
Filling the Tank . . . . . . . . . . . . . . . 207
Foreign Countries . . . . . . . . . . . . 207
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 105
Low Fuel Warning Light . . . . . . . .115
Management, Active . . . . . . . . . . 180
Requirements, California . . . . . 207
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . 247 Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 247
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 251
G
Garage Door Opener . . . . . . . . . . . 131Programming . . . . . . . . . . . . . . . . . 131
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . 244
Gauges Boost . . . . . . . . . . . . . . . . . . . . . . . . . 106
Engine CoolantTemperature . . . . . . . . . . . . . . . . 106
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Odometer . . . . . . . . . . . . . . . . . . . . . 104
Speedometer . . . . . . . . . . . . . . . . . 104
Tachometer . . . . . . . . . . . . . . . . . . . 104
Trip Odometer . . . . . . . . . . . . . . . . 104

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374030) - 2018 - crc - 4/5/17
348 Index
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 194Driver Control . . . . . . . . . . . . . . . . . 194
Monitor System, Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 264
N
NavigationOnStar . . . . . . . . . . . . . . . . . . . . . . . 332
Net Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Net, Convenience . . . . . . . . . . . . . . . 93
New Vehicle Break-In . . . . . . . . . . . 174
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . 104 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Off-Road
Recovery . . . . . . . . . . . . . . . . . . . . . 156
Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . 222
Engine Oil Life System . . . . . . . 227
Pressure Light . . . . . . . . . . . . . . . . .115
Older Children, Restraints . . . . . . . 81
Online Owner Center . . . . . . . . . . . 319
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . 329
OnStar Additional Information . . . . . . . . . . . . . . . . . . . . 336
OnStar Connections . . . . . . . . . . . . 333
OnStar Diagnostics . . . . . . . . . . . . . 335 OnStar Emergency . . . . . . . . . . . . . 332
OnStar Navigation . . . . . . . . . . . . . . 332
OnStar Overview . . . . . . . . . . . . . . . 330
OnStar Security . . . . . . . . . . . . . . . . 332
Ordering
Service Publications . . . . . . . . . . 325
Outlets
Power . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Overheating, Engine . . . . . . . . . . . . 236
P
Panel, Roof . . . . . . . . . . . . . . . . . . . . . . 47
Park Shifting Into . . . . . . . . . . . . . . . . . . . 178
Shifting Out of . . . . . . . . . . . . . . . . 179
Parking . . . . . . . . . . . . . . . . . . . . . . . . . 180 Brake and P (Park)
Mechanism Check . . . . . . . . . . 243
Extended . . . . . . . . . . . . . . . . . . . . . 180
Over Things That Burn . . . . . . . 180
Parking Assist . . . . . . . . . . . . . . . . . . 204
Parking or Backing
Assistance Systems . . . . . . . . . . 204
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . . 108
Passenger Compartment Air
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Passenger Sensing System . . . . . 75 Perchlorate Materials
Requirements, California . . . . . . 213
Performance Data Recorder (PDR) . . . . . . . . . . . . . . . 141
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . 124
Power
Door Locks . . . . . . . . . . . . . . . . . . . . . 36
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Outlets . . . . . . . . . . . . . . . . . . . . . . . . . 97
Protection, Battery . . . . . . . . . . . . 140
Retained Accessory (RAP) . . . 178
Seat Adjustment . . . . . . . . . . . . . . . . 57
Windows . . . . . . . . . . . . . . . . . . . . . . . 45
Pregnancy, Using Seat Belts . . . . 68
Privacy Vehicle Data Recording . . . . . . . 328
Program Courtesy Transportation . . . . . . 322
Proposition 65 Warning,
California . . . . . . . . . . . .212, 240, 284,
Back Cover
R
Radio Frequency Statement . . . . 326
Reading Lamps . . . . . . . . . . . . . . . . . 139
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . 242
Rear Storage . . . . . . . . . . . . . . . . . . . . 91