2018 CHEVROLET CORVETTE engine coolant

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374030) - 2018 - CRC - 11/8/17
238 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 0240.
The engine coolant surge tank is
toward the rear of the engine
compartment on the passenger side
of the vehicle. See Engine
Compartment Overview 0221. 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 - 11/8/17
Vehicle Care 239
1. When the cooling system,including the coolant surge
tank pressure cap and upper
radiator hose, is no longer hot,
remove the pressure cap.
Turn the pressure cap slowly
counterclockwise about
one-quarter turn and then stop.
If a hiss is heard, wait for that
to stop. A hiss means there is
still some pressure left.
2. Keep turning the pressure cap slowly, and remove it.
3. Fill the coolant surge tank with the proper mixture until the
level inside stabilizes at the
cold fill line on the front of the
surge tank.
4. With the coolant surge tank pressure 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.
6. Verify coolant level after the engine is shut off and the
coolant is cold. If necessary,
repeat coolant fill procedure
Steps 1−6.
If the coolant still is not at the
proper level when the system
cools down again, see your
dealer.
Caution
If the pressure cap is not tightly
installed, coolant loss and engine
damage may occur. Be sure the
cap is properly and tightly
secured.
Cooling System (Aero
Panel)
The aero panel enhances
aerodynamic efficiency and
improves fuel economy.
Remove the aero panel and bracket
to improve engine cooling and air
conditioning performance when
driving aggressively or in hot
weather.
To remove the aero panel and
bracket:
Stingray Shown, Grand Sport and
Z06 Similar

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374030) - 2018 - CRC - 11/8/17
240 Vehicle Care
1. Press up on the two indents atthe 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 0108.
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 0325.
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
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.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374030) - 2018 - CRC - 11/8/17
Vehicle Care 241
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.
Adding Washer Fluid
Open the cap with the washer
symbol on it. Add washer fluid until
the tank is full. See
Engine
Compartment Overview 0221.
Caution
.
Do not use washer fluid that
contains any type of water
repellent coating. This can
cause the wiper blades to
chatter or skip.
. Do not use engine coolant
(antifreeze) in the
windshield washer. It can
damage the windshield
washer system and paint.
(Continued)

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374030) - 2018 - CRC - 11/8/17
304 Service and Maintenance
Maintenance
Schedule
Owner Checks and Services
At Each Fuel Stop
.Check the engine oil level. See
Engine Oil 0226.
Once a Month
. Check the tire inflation
pressures. See Tire Pressure
0 266.
. Inspect the tires for wear. See
Tire Inspection 0270.
. Check the windshield washer
fluid level. See Washer Fluid
0 241.
Engine Oil Change
When the CHANGE ENGINE OIL
SOON message displays, have the
engine oil and filter changed within
the next 1 000 km/600 mi. If driven
under the best conditions, the
engine oil life system may not
indicate the need for vehicle service
for up to a year. The engine oil and filter must be changed at least once
a year and the oil life system must
be reset. Your trained dealer
technician can perform this work.
If the engine oil life system is reset
accidentally, service the vehicle
within 5 000 km/3,000 mi since the
last service. Reset the oil life
system when the oil is changed.
See
Engine Oil Life System 0231.
Dry Sump Engine Break-In Oil
Change
If equipped with a dry sump engine,
the initial oil and filter change must
be performed at 800 km/500 mi.
Follow the engine oil life system for
every oil change thereafter.
Required Services Every
12 000 km/7,500 mi
. Check engine oil level and oil
life percentage. If needed,
change engine oil and filter,
and reset oil life system.
See Engine Oil 0226 and
Engine Oil Life System 0231. .
Check engine coolant level.
See Cooling System (Engine)
0 236 orCooling System (Aero
Panel) 0239.
. Check windshield washer fluid
level. See Washer Fluid 0241.
. Visually inspect windshield wiper
blades for wear, cracking,
or contamination. See Exterior
Care 0292. Replace worn or
damaged wiper blades. See
Wiper Blade Replacement
0 247.
. Check tire inflation pressures.
See Tire Pressure 0266.
. Inspect tire wear. See Tire
Inspection 0270.
. Visually check for fluid leaks.
. Inspect engine air cleaner filter.
See Engine Air Cleaner/Filter
0 233.
. Inspect brake system. See
Exterior Care 0292.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374030) - 2018 - CRC - 11/8/17
Service and Maintenance 313
Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
Fluids and lubricants identified below by name, part number, or specification can be obtained from your dealer.Usage Fluid/Lubricant
Chassis Lubrication Chassis Lubricant (GM Part No. 12377985, in Canada 88901242) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB.
Electronic Limited-Slip Differential (eLSD) Clutch System Lubricant
(Z51, Grand Sport, and Z06 Only) DEXRON-VI Automatic Transmission Fluid.
Engine Coolant 40/60 coolant/water mixture of clean, drinkable water and use only DEX-COOL Coolant.
SeeCooling System (Engine) 0236 orCooling System (Aero Panel) 0239.
Engine Oil Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. Mobil 1 dexos1 full synthetic is recommended. See Engine Oil
0 226.
Hood Latch Assembly, Secondary Latch, Pivots, Spring Anchor, and Release Pawl Lubriplate Lubricant Aerosol (GM Part No. 89021668, in Canada 89021674)
or lubricant meeting requirements of NLGI #2, Category LB or GC-LB.
Hydraulic Brake System (Vehicles with DOT 3 brake fluid) DOT 3 Hydraulic Brake Fluid (GM Part No. 19353126, in
Canada 19299819). See
Brake Fluid0243.
Hydraulic Brake System (Vehicles with DOT 4 brake fluid) DOT 4 Hydraulic Brake Fluid (GM Part No. 19299570, in
Canada 19299571). See
Brake Fluid0243.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374030) - 2018 - CRC - 11/8/17
Index 349
Compressor Kit, Tire Sealant . . . 279
ConnectionsOnStar . . . . . . . . . . . . . . . . . . . . . . . 338
Control Traction and ElectronicStability . . . . . . . . . . . . . . . . . . . . . 196
Control of a Vehicle . . . . . . . . . . . . . 157
Convenience Net . . . . . . . . . . . . . . . . 95
Convertible Top . . . . . . . . . . . . . . . . . . 52
Convex Mirrors . . . . . . . . . . . . . . . . . . 44
Coolant
Engine Temperature Gauge . . 108
Engine TemperatureWarning Light . . . . . . . . . . . . . . . .115
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . 149
Cooling System . . . . . . . . . . . . 236, 239
Courtesy Lamps . . . . . . . . . . . . . . . . 141
Courtesy Transportation Program . . . . . . . . . . . . . . . . . . . . . . . 327
Cover Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Cruise Control . . . . . . . . . . . . . . . . . . 205 Light . . . . . . . . . . . . . . . . . . . . . . . . . . .118
Cupholders . . . . . . . . . . . . . . . . . . . . . . 93
Customer Assistance . . . . . . . . . . . 324 Offices . . . . . . . . . . . . . . . . . . . . . . . . 323
Text Telephone (TTY)Users . . . . . . . . . . . . . . . . . . . . . . . 324 Customer Information
Service Publications
Ordering Information . . . . . . . . 330
Customer Satisfaction Procedure . . . . . . . . . . . . . . . . . . . . . 321
D
Damage Repair, Collision . . . . . . . 328
Danger, Warning, and Caution . . . . 2
Data CollectionInfotainment System . . . . . . . . . . 334
OnStar . . . . . . . . . . . . . . . . . . . . . . . 334
Data Recorder Performance . . . . . . . . . . . . . . . . . . 143
Data Recorders, Event . . . . . . . . . 333
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . . . . 138
Defensive Driving . . . . . . . . . . . . . . . 157
Delayed Locking . . . . . . . . . . . . . . . . . 38
Diagnostics OnStar . . . . . . . . . . . . . . . . . . . . . . . 340
Differential, Limited-Slip . . . . . . . . 205
Distracted Driving . . . . . . . . . . . . . . . 156
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . .118
Delayed Locking . . . . . . . . . . . . . . . . 38
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Power Locks . . . . . . . . . . . . . . . . . . . . 37 Drive Belt Routing, Engine . . . . . . 320
Driver Information
Center (DIC) . . . . . . . . . . . . . . . . . . 118
Driver Mode Control . . . . . . . . . . . . 198
Driving Competitive . . . . . . . . . . . . . . . . . . . 201
Defensive . . . . . . . . . . . . . . . . . . . . . 157
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . 157
For Better Fuel Economy . . . . . . . 25
Hill and Mountain Roads . . . . . . 171
If the Vehicle is Stuck . . . . . . . . . 173
Loss of Control . . . . . . . . . . . . . . . 159
Off-Road Recovery . . . . . . . . . . . 158
Track Events andCompetitive . . . . . . . . . . . . . . . . . 159
Vehicle Load Limits . . . . . . . . . . . 173
Wet Roads . . . . . . . . . . . . . . . . . . . 170
Winter . . . . . . . . . . . . . . . . . . . . . . . . 172
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . 149
E
Electric Parking Brake . . . . . . . . . . 193
Electric Parking Brake Light . . . . 113
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . . 214

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374030) - 2018 - CRC - 11/8/17
350 Index
Electrical SystemEngine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 252
Fuses . . . . . . . . . . . . . . . . . . . . . . . . 251
Overload . . . . . . . . . . . . . . . . . . . . . 251
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 254
Electronic Stability Control (ESC) Off Light . . . . . . . . . . . . . . . . 115
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . 337
Engine Air Cleaner/Filter . . . . . . . . . . . . . 233
Check Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . . 111
Compartment Overview . . . . . . . 221
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 108
Coolant Temperature Warning Light . . . . . . . . . . . . . . . .115
Cooling System . . . . . . . . . . 236, 239
Drive Belt Routing . . . . . . . . . . . . 320
Exhaust . . . . . . . . . . . . . . . . . . . . . . 184
Oil Life System . . . . . . . . . . . . . . . 231
Oil Pressure Light . . . . . . . . . . . . .116
Overheating . . . . . . . . . . . . . . . . . . 240
Power Messages . . . . . . . . . . . . . 125
Running While Parked . . . . . . . . 185 Engine (cont'd)
Starting . . . . . . . . . . . . . . . . . . . . . . . 180
Entry Lighting . . . . . . . . . . . . . . . . . . . 141
Event Data Recorders . . . . . . . . . . 333
Exit Lighting . . . . . . . . . . . . . . . . . . . . 141
Extended Parking . . . . . . . . . . . . . . . 184
Extender, Seat Belt . . . . . . . . . . . . . . 70
Exterior Lamp Controls . . . . . . . . . 137
Exterior Lamps Off Reminder . . . 137
Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . . . . 142
F
FeaturesMemory . . . . . . . . . . . . . . . . . . . . . . . . . 13
Filter, Engine Air Cleaner . . . . . . . . . . . 233
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 138
Flashers, Hazard Warning . . . . . . 140
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 278
Floor Mats . . . . . . . . . . . . . . . . . . . . . . 300
Fluid Automatic Transmission . . . . . . 232
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 243
Washer . . . . . . . . . . . . . . . . . . . . . . . 241
Folding Mirrors . . . . . . . . . . . . . . . . . . 45
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . 331 Front Air Dam . . . . . . . . . . . . . . . . . . 178
Front Seats
Heated and Ventilated . . . . . . . . . . 64
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210 Additives . . . . . . . . . . . . . . . . . . . . . .211
Economy Driving . . . . . . . . . . . . . . . 25
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . 213
Filling the Tank . . . . . . . . . . . . . . . 212
Foreign Countries . . . . . . . . . . . . .211
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 106
Low Fuel Warning Light . . . . . . . .117
Management, Active . . . . . . . . . . 184
Requirements, California . . . . . .211
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . 251 Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 252
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 254
G
Garage Door Opener . . . . . . . . . . . 133Programming . . . . . . . . . . . . . . . . . 133
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . 248
Gauges Boost . . . . . . . . . . . . . . . . . . . . . . . . . 107
Engine Coolant
Temperature . . . . . . . . . . . . . . . . 108