2023 CHEVROLET CORVETTE FLUID

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16287457) - 2023 - CRC - 3/10/22
174 Driving and Operating
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.
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 Fuels0227.
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. Stingray
Add an additional 2 L (2 qt) of DCT
transmission fluid before track use. It is not
required to remove the additional 2 L (2 qt)
of DCT fluid after the track event.
Any transmission level set or change should
be performed at your dealer.
Z06
Additional transmission fluid is not required
for the Z06. The Z06 comes track ready
from the factory.
Brakes
Battery Disconnect
Disconnect the battery before servicing the
hydraulic brake system. It is critical to
disconnect the battery before bleeding the
system, replacing the pads, or any other
work. The battery must be disconnected to
prevent the brake master cylinder from
pressurizing the hydraulic system during its
automated self diagnostic tests that can
occur when a door is opened or the remote
key is present.
{Warning
To avoid personal injury and/or vehicle
damage, always disconnect the battery
before performing service work on the
hydraulic brake system. Bleeding the
brake system with the battery connected
can lead to the system diagnosing a leak
or air in the braking system. A Diagnostic
Trouble Code (DTC) may set and vehicle
speed may be limited.
Brake Fluid
Replace existing brake fluid with a qualified
high performance DOT 4 brake fluid from a
sealed container. Brake fluid with a dry
boiling point >310 °C (590 °F) is qualified.
If high performance brake fluid is used,
replace it with GM approved brake fluid
before driving on public roads. If high
performance brake fluid is in the vehicle and
the age of the brake fluid is over a month
old or unknown, replace the brake fluid
before track events and competitive driving.
Do not use silicone or DOT-5 brake fluids.
Check the fluid level before each competitive
driving event.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Driving and Operating 175
Brake System Flushing and Bleeding
The J55, J56, and J57 brake systems require
specific processes for bleeding and fluid
flushing. These can be found in the service
manual.
Properly bleeding the brake system is
required for proper operation of the
hydraulic brake system.
Brake Leak Detection
The hydraulic braking system has advanced
diagnostic capability to help detect hydraulic
leaks, trapped air, and other performance
issues. These diagnostics are active when
the hydraulic system is powered. To avoid
inadvertently setting a leak DTC, disconnect
the battery before servicing the brake
system.
If the vehicle sets a DTC related to a brake
system leak, the Brake System Warning
Light will come on and vehicle speed may
be limited to 100 kph (62 mph). Any time a
leak DTC is set, the vehicle should be
inspected carefully for evidence of a leak
and should be repaired immediately. See
your dealer.Brake Fade Warning Assist
The Brake Fade Warning Assist system
monitors brake system performance. If the
system detects brake fade, or if the brake
fluid is near the boiling point, the driver will
be alerted.
The Brake Fade Warning Assist system is
designed for use with the factory-installed
brake pads or GM approved replacement
pads. If the brake pads on the vehicle need
to be replaced, use GM approved brake
pads. If this is not done, the brake fade
warning system may not function properly.
Stage 1 :
The Driver Information Center (DIC)
displays a “Reduce Braking to Avoid
Overheating” message, a chime sounds and
brake pedal effort and travel is increased.
When the message displays, the driver
should back up braking points and reduce
brake usage in order to reduce brake
temperature. This will allow for continued
lapping with no speed limitations. Stage 2 :
The Driver Information Center
(DIC) displays a “Brakes Overheated Service
Now” message, a chime sounds, and brake
pedal effort and travel is further increased.
This code indicates that the brake fluid
temperature is excessive and is about to
boil. The system limits vehicle speed to
100KPH/62MPH. The driver should
immediately start a cool down lap if on the
track. If this message displays, the vehicle
needs to be serviced. The brake system
needs to cool down, and the brake fluid
must be immediately flushed with DOT4 for
street use, or to a qualified DOT4 race fluid
for track use. Boiled brake fluid is
compromised and must be replaced.
Brake Burnishing
Caution
Performing the brake burnish procedure
on a base brake system can result in
brake damage.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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184 Driving and Operating
Other Rainy Weather Tips
Besides slowing down, other wet weather
driving tips include:
.Allow extra following distance.
.Pass with caution.
.Keep windshield wiping equipment in
good shape.
.Keep the windshield washer fluid reservoir
filled.
.Have good tires with proper tread depth.
SeeTires 0271.
.Turn off cruise control.
Hill and Mountain Roads
Driving on steep hills or through mountains
is different than driving on flat or rolling
terrain. Tips include:
.When driving downhill in D (Drive), the
vehicle may automatically downshift to
assist with speed control.
.A lower gear may also be selected to
provide further speed control.
{Warning
Using the brakes to slow the vehicle on a
long downhill slope can cause brake
overheating, can reduce brake
performance, and could result in a loss of
braking. Shift the transmission to a lower
gear to let the engine assist the brakes
on a steep downhill slope.
{Warning
Coasting downhill in N (Neutral) or with
the ignition off is dangerous. This can
cause overheating of the brakes and loss
of steering assist. Always have the engine
running and the vehicle in gear.
.Drive at speeds that keep the vehicle in
its own lane. Do not swing wide or cross
the center line.
.Be alert on top of hills; something could
be in your lane (e.g., stalled car, crash).
.Pay attention to special road signs
(e.g., falling rocks area, winding roads,
long grades, passing or no-passing zones)
and take appropriate action.
Winter Driving
Driving on Snow or Ice
Caution
To avoid damage to the wheels and
brake components, always clear snow and
ice from inside the wheels and
underneath the vehicle before driving.
Snow or ice between the tires and the road
creates less traction or grip, so drive
carefully. Wet ice can occur at about 0 °C
(32 °F) when freezing rain begins to fall.
Avoid driving on wet ice or in freezing rain
until roads can be treated.
For Slippery Road Driving:
.Accelerate gently. Accelerating too quickly
causes the wheels to spin and makes the
surface under the tires slick.
.Turn on Traction Control. See Traction
Control/Electronic Stability Control 0206.
.The Antilock Brake System (ABS) improves
vehicle stability during hard stops, but
the brakes should be applied sooner than
when on dry pavement. See Antilock
Brake System (ABS) 0204.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Driving and Operating 195
Warning (Continued)
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 the vehicle with the engine
running in an enclosed area such as a
garage or a building that has no fresh air
ventilation.
{Warning
To prevent exhaust gases from entering
the vehicle and heat from damaging the
vehicle, the engine cover and all fluid fill
plugs must be secured before closing the
tonneau cover (convertible only) and
operating the vehicle. Make sure all bolts
are torqued to GM specifications.
Running the Vehicle While Parked
It is better not to park with the engine
running.
If the vehicle is left with the engine running,
follow the proper steps to be sure the
vehicle will not move. See Shifting Into Park
0 193 and
Engine Exhaust 0194.
Dual Clutch Transmission
This vehicle is equipped with a dual clutch
transmission that contains an integrated
rear differential. The dual clutch
transmission provides an extremely
connected feel due to the direct connection between the engine and gear box. This
arrangement provides very fast shift times
for maximum performance. Automatic
driving mode is selected by pulling D on the
transmission range selection panel and
provides fully automatic shifting operation
which can be further refined using driver
mode control. Upshifts may be delayed
regardless of mode selection or ambient
temperature until the engine is warmed up.
Manual operation can also be selected. See
Manual Mode later in this section.
This transmission is electronically controlled.
The shift switches are on the center console.
The selected gear position will illuminate red
on the shift switch, while all others will
display in white. The indicator on the shift
switch may flash if the shift is not
immediate or if the gear is not fully
engaged. This may occur in very cold
conditions or when Double Paddle Declutch
is used.
The transmission does not operate when the
vehicle is off.
If the vehicle is in accessory mode, the
transmission can be shifted into P (Park).

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Driving and Operating 197
Caution
The vehicle is not designed to stay in
N (Neutral) for extended periods of time.
It will automatically shift into P (Park).
To shift into N (Neutral), press and hold the
N (Neutral) switch until the N indicator
is red.
To shift out of N (Neutral): 1. Bring the vehicle to a complete stop.
2. Shift into the desired gear.
Maintaining N (Neutral) with Engine Off
This vehicle includes a method of keeping
the vehicle in N (Neutral) while the engine
is off.
This method is not to be used for vehicle
towing. If the vehicle needs to be towed,
see Transporting a Disabled Vehicle 0293.
Driver Remains in Vehicle : To place the
vehicle in N (Neutral) with the engine off
and the vehicle occupied:
1. Ensure the vehicle is on level ground, the engine is running and the vehicle is in
P (Park). 2. Apply the brake pedal.
3. Shift to N (Neutral).
4. Turn off the engine and release the
brake pedal.
5. The indicator should continue to show N. If it does not, start the engine and
repeat Steps 2–4.
6. The vehicle will now remain in N (Neutral).
Driver Leaves Vehicle : To place the vehicle
in N (Neutral) with the engine off and the
vehicle unoccupied:
1. Ensure the vehicle is on level ground, the engine is running and the vehicle is in
P (Park).
2. Apply the brake pedal.
3. Open the door.
4. Shift to N (Neutral).
5. Turn off the engine and release the brake pedal.
6. The indicator should continue to show N. If it does not, start the engine and
repeat Steps 2–5.
7. Exit the vehicle and close the door. 8. The vehicle may automatically shift to
P (Park) upon re-entry.Caution
A transmission hot message may display
if the transmission fluid is too hot.
Driving under this condition can damage
the vehicle. Stop and idle the engine to
cool the transmission fluid. This message
clears when the transmission fluid has
cooled sufficiently.
D : This position is for normal driving.
If more power is needed for passing, press
the accelerator pedal.
If the vehicle is shifted into D (Drive) while
the speed is too high, the transmission will
get ready to engage D (Drive). Reduce the
vehicle speed, then the transmission will
engage D (Drive).
To shift into D (Drive):
1. Bring the vehicle to a complete stop.
2. Pull the D (Drive) switch on the center console.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Driving and Operating 215
The Front Lift System can also be used in
accessory mode. Put the vehicle in accessory
mode and press and hold the button on the
center console for 10 consecutive seconds to
automatically raise the vehicle.
The Driver Information Center (DIC) may
display the message“Lift System
Unavailable” if:
.any doors are ajar
.the hood is open
.the vehicle is moving over 38 km/h
(24 mph)
.too many lift requests within a short
period
The Front Lift System should not be used to
service the vehicle. Do not place anything or
body parts under the vehicle while lifted.
See Recommended Fluids and Lubricants
0 310.
Competitive Driving Mode
If equipped, Competitive Driving Mode,
Performance Traction Management (PTM),
and Launch Control are systems designed to
allow increased performance while
accelerating and/or cornering. This is
accomplished by regulating and optimizing
the engine, brakes, and suspension performance. These modes are for use at a
closed course race track and are not
intended for use on public roads. They will
not compensate for driver inexperience or
lack of familiarity with a race track. Drivers
who prefer to allow the system to have
more control of the engine, brakes, and
suspension are advised to turn on the
normal traction control and StabiliTrak/
Electronic Stability Control (ESC) systems on.
Competitive Driving Mode
Competitive Driving Mode allows full engine
power while StabiliTrak/ESC helps maintain
directional control of the vehicle by selective
brake application. In this mode, the Traction
Control System (TCS) is off and Launch
Control is available.
Adjust your driving style to account for the
available engine power. See
“Launch
Control” later in this section.
These lights are on when the vehicle is in
the Competitive Driving Mode.
To select this optional handling mode, the
vehicle mode must be Sport or Track (if
equipped with PTM, then Competitive
Driving Mode is only available in Sport).
Then quickly press
@on the center console
two times. ESC COMPETITIVE MODE displays
in the Driver Information Center (DIC).
When
@is pressed again, the traction off
light
iand StabiliTrak/ESC OFF light@
will go out.
Performance Traction
Management (PTM)
If equipped, PTM integrates the TCS,
StabiliTrak/ESC, and Magnetic Ride Control
systems to provide improved and consistent
performance when cornering. The amount of
available engine power is based on the
mode selected, track conditions, driver skill,
and the radius of each corner.

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Vehicle Care 231
Vehicle Care
General Information
General Information . . . . . . . . . . . . . . . . . . . 232
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . . . . . . 232
Accessories and Modifications . . . . . . . . . 232
Lifting the Vehicle . . . . . . . . . . . . . . . . . . . . . 232
Vehicle Checks
Doing Your Own Service Work . . . . . . . . 234
Underhood Compartment Overview . . . 234
Engine Compartment Overview . . . . . . . . 235
Engine Oil (5.5L LT6 Engine) . . . . . . . . . . . 242
Engine Oil (6.2L LT2 Engine) . . . . . . . . . . . 245
Engine Oil Life System . . . . . . . . . . . . . . . . 248
Dual Clutch Transmission Fluid . . . . . . . . 249
Dual Clutch Transmission Fluid Life System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Engine Air Filter Life System . . . . . . . . . . 250
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . 251
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . 252
Engine Overheating . . . . . . . . . . . . . . . . . . . . 255
Washer Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Brake Pad Life System (If Equipped) . . . 259
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
Battery - North America . . . . . . . . . . . . . . . 261
Park Brake and P (Park) Mechanism Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262 Wiper Blade Replacement . . . . . . . . . . . . . 262
Windshield Replacement . . . . . . . . . . . . . . 263
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Headlamp Aiming
Front Headlamp Aiming . . . . . . . . . . . . . . . 264
Bulb Replacement
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Electrical System
Electrical System Overload . . . . . . . . . . . . 264
Fuses and Circuit Breakers . . . . . . . . . . . . 266
Instrument Panel Fuse Block . . . . . . . . . . 266
Rear Compartment Fuse Block . . . . . . . . . 268
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
All-Season Tires . . . . . . . . . . . . . . . . . . . . . . . . 272
Winter Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Run-Flat Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Low-Profile Tires . . . . . . . . . . . . . . . . . . . . . . . 273
Competition Oriented Tires . . . . . . . . . . . . 273
Summer Tires . . . . . . . . . . . . . . . . . . . . . . . . . 274
Tire Sidewall Labeling . . . . . . . . . . . . . . . . . 274
Tire Designations . . . . . . . . . . . . . . . . . . . . . . 275
Tire Terminology and Definitions . . . . . . 276
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Tire Pressure for High-Speed
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
Tire Pressure Monitor System . . . . . . . . . 280
Tire Pressure Monitor Operation . . . . . . . 281 Tire Inspection . . . . . . . . . . . . . . . . . . . . . . . . 283
Tire Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . 283
When It Is Time for New Tires . . . . . . . . 285
Buying New Tires . . . . . . . . . . . . . . . . . . . . . 285
Different Size Tires and Wheels . . . . . . . 286
Uniform Tire Quality Grading . . . . . . . . . . 287
Wheel Alignment and Tire Balance . . . . 288
Wheel Replacement . . . . . . . . . . . . . . . . . . . 288
Tire Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
If a Tire Goes Flat . . . . . . . . . . . . . . . . . . . . . 290
Jump Starting
Jump Starting - North America . . . . . . . . 290
Towing the Vehicle
Transporting a Disabled Vehicle . . . . . . . 293
Recreational Vehicle Towing . . . . . . . . . . . 296
Appearance Care
Exterior Care . . . . . . . . . . . . . . . . . . . . . . . . . . 296
Interior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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234 Vehicle Care
Position the service jack and lifting pad
under the frame rail shipping slot
reinforcement.
For more information, seeDoing Your Own
Service Work 0234.
Vehicle Checks
Doing Your Own Service Work
{Warning
It can be dangerous to work on your
vehicle if you do not have the proper
knowledge, service manual, tools,
or parts. Always follow owner’s manual
procedures and consult the service
manual for your vehicle before doing any
service work.
If doing some of your own service work, use
the proper service manual. It tells you much
more about how to service the vehicle than
this manual can. To order the proper service
manual, see Publication Ordering
Information 0327. This vehicle has an airbag system. Before
attempting to do your own service work,
see
Servicing the Airbag-Equipped Vehicle
0 59.
If equipped with remote vehicle start, open
the hatch/trunk before performing any
service work to prevent remote starting the
vehicle accidentally. See Remote Vehicle
Start 012.
Keep a record with all parts receipts and list
the mileage and the date of any service
work performed. See Maintenance Records
0 313.
Caution
Even small amounts of contamination can
cause damage to vehicle systems. Do not
allow contaminants to contact the fluids,
reservoir caps, or dipsticks.
Underhood Compartment
Overview
1. Front Lift System Reservoir (Under Cover,
if equipped). See Front Lift System 0214.
2. Battery (Under Cover). See Battery -
North America 0261.
3. Brake Fluid Reservoir (Under Cover). See Brake Fluid 0260.
4. Windshield Washer Fluid Reservoir. See Washer Fluid 0256.