2024 CHEVROLET CORVETTE coolant temperature

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
17272984) - 2024 - CRC - 2/20/23
Lighting 113
Raise or lower the lever until the arrow
starts to flash to signal a lane change. Hold
it there until the lane change is complete.
If the lever is briefly pressed and released,
the turn signal flashes three times. If more
flashes are desired, continue to hold the
lever.
The lever returns to its starting position
when it is released.
If after signaling a turn or lane change the
arrows flash rapidly or do not come on, a
turn signal indicator light failure may have
occurred.
If a turn signal has failed, the lamp may
need to be replaced. See your dealer.
Turn Signal on Chime
A chime sounds if the turn signal has been
on for more than 1.2 km (0.75 mi) of driving.
If you need to leave the turn signal on for
more than 1.2 km (0.75 mi), turn off the
signal and then turn it back on.Interior Lighting
Instrument Panel Illumination
Control
This feature adjusts the brightness of all
illuminated controls. The knob for this
feature is on the left side of the instrument
panel.
Turn the knob clockwise or counterclockwise
to brighten or dim the lights.
The knob is functional at night, or when
headlamps or the parking lamps are on.
Lighting Stealth Mode
Stealth mode is only available at night. To
enable Stealth mode, turn the knob to the
OFF position. In Stealth mode, the only
graphics visible on the instrument clusterare the coolant temperature, energy usage,
digital speed, and any active telltales or
alerts.
Courtesy Lamps
The interior lamps will come on when any
door is opened,
Kon the remote key is
pressed, or when the ignition is
switched off.
The hatch/trunk lamps only come on when
the rear compartment is opened.
Reading Lamps
If equipped, the reading lamps are in the
overhead console. The lamps go on when
any door is opened,
Kon the remote key is
pressed, or when the vehicle is turned off.
Press the lamp buttons to manually turn on
or off each lamp.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
17272984) - 2024 - CRC - 2/20/23
Driving and Operating 161
Check the oil level often during track events
and competitive driving. See“Checking the
Engine Oil" in Engine Oil (5.5L LT6 Engine)
0 246 or
Engine Oil (6.2L LT2 Engine) 0249.
Engine Cooling
If reduced performance is experienced during
track events or competitive driving, turning
off the A/C will help to improve engine
performance.
Maintain a mixture of 40% DEX-COOL
coolant and 60% clean, drinkable water to
optimize engine performance.
For vehicles with the optional Grille Screen
Guards (VWE), remove them for track events
when the ambient temperature reaches
32° C (90° F) or higher. See your dealer for
complete procedure.
If equipped, remove the front license plate
and bracket (if installed) and remove the
front aero covers before track use. See your
dealer for complete procedure.
Fuel
Unleaded gasoline, rated at 93 octane or
higher, is required.
Caution
Some high octane fuels contain additives
and compounds that may damage the
vehicle and void the vehicle warranty. See
Prohibited Fuels 0227.
Dual Clutch Transmission (DCT) Fluid
The transmission fluid and external canister
filter should be changed after every 24 hours
of track use. Change the fluid and external
canister filter as soon as possible if
prompted by the transmission fluid life
monitor that remaining fluid life is low.
With the transmission at factory fluid fill,
there is no additional fluid needed for track
usage. Any transmission level set or change
should be performed at your dealer.
Front Hybrid Drive Unit Fluid (E-Ray)
If equipped, the front hybrid drive unit fluid
should be changed after every 15 hours of
track use. This procedure can be complex,
see your dealer.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Vehicle Care 257
Caution
If the air cleaner/filter is off, dirt can
easily get into the engine, which
could damage it. Always have the air
cleaner/filter in place when driving.
Cooling System (Engine)
The engine cooling system allows the
engine to maintain the correct working
temperature. Vehicles equipped with
Electrified Propulsion (E-Ray) have additonal
cooling systems. See Cooling System
(Electrified Propulsion) later in this section.
E-Ray Convertible Shown, Stingray
Convertible and Z06 Convertible Similar
E-Ray Coupe Shown, Stingray Coupe and Z06 Coupe Similar
1. Engine Cooling Fans (Out of View)
2. Engine Coolant Surge Tank withPressure Cap
3. High Voltage Battery Coolant Reservoir (E-Ray Only).
{Warning
An underhood electric fan can start up
even when the engine is not running and
can cause injury. Keep hands, clothing,
and tools away from any underhood
electric fan.
{Warning
Do not touch heater or radiator hoses,
or other engine parts. They can be very
hot and can burn you. Do not run the
engine if there is a leak; all coolant could
leak out. That could cause an engine fire
and can burn you. Fix any leak before
driving the vehicle.
Engine Coolant
The cooling system in the vehicle is filled
with DEX-COOL engine coolant. See
Recommended Fluids and Lubricants 0320.
The fluid requires changing at certain
intervals. See Maintenance Schedule 0316.
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 0261.
What to Use
{Warning
Plain water, or other liquids such as
alcohol, can boil before the proper
coolant mixture will. With plain water or
(Continued)

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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258 Vehicle Care
Warning (Continued)
the wrong mixture, the engine could get
too hot but there would not be an
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. 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
Do not use anything other than a mix of
DEX-COOL coolant that meets GM
Standard GMW3420 and clean, drinkable
water. Anything else can cause damage
to the engine cooling system and the
vehicle, which would not be covered by
the vehicle warranty. 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
Be sure the cooling system is cool and that
the vehicle is on a level surface.
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
0 261. The surge tank is in the engine
compartment. See
Engine Compartment
Overview 0238.
When the engine is cold, the coolant level
should be at the COLD FILL indicator in the
coolant surge tank.
When the engine is hot, the level could be
higher than the COLD FILL indicator. If the
coolant is below the COLD FILL indicator
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.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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260 Vehicle Care
7. Verify coolant level after the engine isshut off and the coolant is cold.
If necessary, repeat coolant fill procedure
Steps 3−7.
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 (Electrified
Propulsion)
The E-Ray is equipped with Electrified
Propulsion and cooling systems for the
Traction Power Inverter Module (TPIM) and
the High Voltage Battery located in the
Engine Compartment, see Engine
Compartment Overview 0238. The TPIM and
the high voltage battery cooling system
reservoirs have tamper- resistant pressure
caps. The coolant should only be serviced by
a qualified technician.
Power Electronic/Traction Power Inverter
Module (TPIM) Cooling System
The Power Electronic Cooling System
reservoir is located in under the front hood.
Rechargeable Energy Storage System
(RESS)/High Voltage Battery Cooling
System
The High Voltage Battery Cooling System
reservoir is located in the rear hatch.
What to Use
{Warning
Plain water, or other liquids such as
alcohol, can boil before the proper
coolant mixture will. With plain water or
the wrong mixture, the engine could get
too hot but there would not be an
overheat warning. The engine could catch
fire and you or others could be burned.
For vehicles equipped with Electrified
Propulsion (E-Ray), if ambient temperatures
are anticipated below −25 °C (−13 °F) for the
high voltage coolant systems, make sure to
use premix 50/50 DEX-COOL and de-ionized
water. 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.
Caution
Do not use anything other than a mix of
DEX-COOL coolant that meets GM
Standard GMW3420 and clean, drinkable
water. Anything else can cause damage
to the engine cooling system and the
vehicle, which would not be covered by
the vehicle warranty.
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.
Checking Coolant
It is not necessary to regularly check coolant
unless a leak is suspected, or an unusual
noise is heard. A coolant loss could indicate
a problem. Have it inspected and repaired

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Vehicle Care 261
by your dealer. The high voltage cooling
system reservoirs have tamper- resistant
pressure caps. The coolant should only be
serviced by a qualified technician.
Engine Overheating
The vehicle has several indicators to warn of
engine overheating.
There is an engine coolant temperature
gauge on the instrument cluster. SeeEngine
Coolant Temperature Gauge 087. The
vehicle may also display a message on the
Driver Information Center (DIC).
If the decision is made not to lift the hatch
but to get service help right away, see
Roadside Assistance Program 0332.
If the decision is made to lift the hatch,
make sure the vehicle is parked on a level
surface.
Then check to see if the engine cooling fans
are running. There are two cooling fans
located in the front (one at each corner) and
two cooling fans in the rear (one on each
side of the engine). If the engine is
overheating, the fans should be running.
If they are 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.
If Steam Is Coming from the Engine
Compartment with no Overheat Warning
Water from rain and car washes could enter
the engine compartment and contact hot
surfaces. If steam is coming from the engine
compartment with no accompanying
overheat warning, no service is needed.
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 engine coolant temperature 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,

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
17272984) - 2024 - CRC - 2/20/23
262 Vehicle Care
continue to drive normally and have the
cooling system checked for proper fill and
function.
If the warning continues, pull over safely,
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
1. Open the hood. SeeHood017.
2. Open the cap with the washer symbol
on it. Add washer fluid until the tank
is full.
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.
.Do not mix water with ready-to-use
washer fluid. Water can cause the
solution to freeze and damage the
washer fluid tank and other parts of
the washer system.
.When using concentrated washer fluid,
follow the manufacturer instructions
for adding water.
.Fill the washer fluid tank only
three-quarters full when it is very cold.
This allows for fluid expansion if
freezing occurs, which could damage
the tank if it is completely full.
Brakes
Disc brake linings have built-in wear
indicators that make a high-pitched warning
sound when the brake linings are worn and
new linings are needed. The sound can come
and go or can be heard all the time when
the vehicle is moving, except when applying
the brake pedal firmly.
{Warning
The brake wear warning sound means
that soon the brakes will not work well.
That could lead to a crash. When the
brake wear warning sound is heard, have
the vehicle serviced.
Caution
Continuing to drive with worn-out brake
linings could result in costly brake
repairs.
Properly torqued wheel nuts are necessary
to help prevent brake pulsation. When tires
are rotated, inspect brake linings for wear
and evenly tighten wheel nuts in the proper
sequence to torque specifications. See
Capacities and Specifications 0325.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
17272984) - 2024 - CRC - 2/20/23
Index 351
Child RestraintsInfants and Young Children . . . . . . . . . . . . . 63
Lower Anchors and Tethers for
Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Older Children . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . 273
Cleaning Exterior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 306
Interior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311
Climate Control Systems Dual Automatic . . . . . . . . . . . . . . . . . . . . . . . . 150
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Cluster, Instrument . . . . . . . . . . . . . . . . . . . . . . . .81
Collision Alert Forward (FCA) System . . . . . . . . . . . . . . . . . 218
Collision Damage Repair . . . . . . . . . . . . . . . . . 335
Compartment Underhood . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Compartments
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Competition Oriented Tires . . . . . . . . . . . . . . .281
Composite Materials . . . . . . . . . . . . . . . . . . . . . . 177
Connected Services Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 346
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348 Connected Services (cont'd)
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346
Connections Connected Services . . . . . . . . . . . . . . . . . . . . 346
Control Hill Rollback . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Traction and Electronic Stability . . . . . . . 194
Control of a Vehicle . . . . . . . . . . . . . . . . . . . . . . 157
Controls Steering Wheel . . . . . . . . . . . . . . . . . . . . . . . . . 119
Convenience Net . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Convertible Top . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Coolant Engine Temperature Gauge . . . . . . . . . . . . . 87
Engine Temperature Warning Light . . . . . 96
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Cooling System . . . . . . . . . . . . . . . . . . . . . 257, 260
Courtesy Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Courtesy Transportation Program . . . . . . . . 334
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212 Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Cupholders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Customer Assistance Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Text Telephone (TTY) Users . . . . . . . . . . . . 331
Customer Information Publications Ordering Information . . . . . 337 Customer Satisfaction Procedure . . . . . . . . . 329
Cybersecurity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339
D
Damage Repair, Collision . . . . . . . . . . . . . . . . . 335
Danger, Warning, and Caution . . . . . . . . . . . . . .2
Dashboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Data Collection
Infotainment System . . . . . . . . . . . . . . . . . . 340
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
Data Recorder Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Data Recorders, Event . . . . . . . . . . . . . . . . . . . 339
Daytime Running Lamps (DRL) . . . . . . . . . . . . 111
Defensive Driving . . . . . . . . . . . . . . . . . . . . . . . . . 157
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Destination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Diagnostics Connected Services . . . . . . . . . . . . . . . . . . . . 348
Differential, Limited-Slip . . . . . . . . . . . . . . . . . . 211
Disabled Vehicle Transporting . . . . . . . . . . . . . . . . . . . . . . . . . . . 303
Distracted Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Distracted Driving . . . . . . . . . . . . . . . . . . . . . . . . 156
Diversity Antenna System . . . . . . . . . . . . . . . .124
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99