service CHEVROLET CORVETTE 2023 Service Manual

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16287457) - 2023 - CRC - 3/10/22
Infotainment System 157
If you decide to continue service after your
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Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16287457) - 2023 - CRC - 3/10/22
Infotainment System 159
Map End User License Agreement
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Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16287457) - 2023 - CRC - 3/10/22
Climate Controls 163
Climate Controls
Climate Control Systems
Dual Automatic Climate ControlSystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Maintenance
Passenger Compartment Air Filter . . . . . 166
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Climate Control Systems
Dual Automatic Climate Control
System
The heating, cooling, and ventilation in the
vehicle can be controlled with this system.
1. Driver Temperature Control
2. Driver and Passenger Heated and Ventilated Seats (If Equipped)

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Climate Controls 167
1. Release the four clips for the left andright outer covers.
2. Release the five clips and remove theouter cover.
3. Press two push tabs on the top and onthe bottom of the cabin air filter cover
and remove the cover.
4. Remove the air filter.
5. Install the new air filter and cover.
6. Install the outer cover.
7. Install the right and left outer covers.
Service
All vehicles have a label underhood that
identifies the refrigerant used in the vehicle.
The refrigerant system should only be
serviced by trained and certified technicians.
The air conditioning evaporator should never
be repaired or replaced by one from a
salvage vehicle. It should only be replaced
by a new evaporator to ensure proper and
safe operation.
During service, all refrigerants should be
reclaimed with proper equipment. Venting
refrigerants directly to the atmosphere is
harmful to the environment and may also
create unsafe conditions based on
inhalation, combustion, frostbite, or other
health-based concerns.
The air conditioning system requires periodic
maintenance. See Maintenance Schedule
0 306.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Driving and Operating 173
using the vehicle for racing or other
competitive driving. SeeCompetitive Driving
Mode 0215.
{Warning
Some of the adjustments and procedures
specified in this section may require
specialized skill, training, and equipment.
Failure to perform these procedures
properly could cause malfunction,
potentially resulting in death, personal
injury, or damage to the vehicle or
property. Do not attempt to perform
these adjustments or procedures unless
properly qualified.
Be sure to follow all service procedures
before driving the vehicle at track events or
competitively. See New Vehicle Break-In
0 189.
{Warning
Prior to each track event and again
before returning to public roads, tighten
the wheel nuts with a torque wrench to
the proper torque specification. Wheel
nuts that are improperly or incorrectly
(Continued)
Warning (Continued)
tightened can cause the wheels to
become loose or come off, resulting in a
crash. SeeCapacities and Specifications
0 315 for wheel nut torque specifications.
For Z06 vehicles only, remove the front
license plate and bracket (if installed) and
remove the front aero covers before track
use. See your dealer for complete procedure.
Engine Sound Management Setting
Caution
Do not place the vehicle in Engine Sound
Management–Stealth mode. Damage
could result to exhaust valve actuators.
Engine Oil
Caution
If the vehicle is used for track events and
competitive driving, the engine may use
more oil than it would with normal use.
Low oil levels can damage the engine.
Check the oil level often and maintain
the proper level. See Engine Oil (5.5L LT6
Engine) 0242 or
Engine Oil (6.2L LT2 Engine) 0245.
Check the oil level often during track events
and competitive driving. See “Checking the
Engine Oil" in Engine Oil (5.5L LT6 Engine)
0 242 or
Engine Oil (6.2L LT2 Engine) 0245.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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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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178 Driving and Operating
Right Side Front Shown, Left Side FrontSimilar
1. Front Brake Cooling Duct
2. Front Lower Control Arm DeflectorRight Side Rear Shown, Left Side Rear Similar
3. Rear Knuckle Mounted Cooling Duct
4. Rear Lower Control Arm Cooling Duct
Aerodynamics
Underbody Strake Inspection (For Z06
Vehicles With Spoiler Regular Production
Options (RPO) TOF or TOG)
Left Side Shown, Right Side Similar
For optimal aero performance, ensure the
front strakes are solidly attached to the
underbody and damage free. If not, replace
with service parts.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Driving and Operating 191
2. Shift into N (Neutral). This can be donewhile the vehicle is moving. After
shifting into N (Neutral), firmly apply the
brakes and steer the vehicle to a safe
location.
3. Come to a complete stop. Shift into P (Park).
4. Set the parking brake. See Electric
Parking Brake 0204. Press ENGINE
START/STOP to turn the vehicle off.
{Warning
Turning off the vehicle while moving may
cause loss of power assist in the brake
and steering systems and disable the
airbags. While driving, only shut the
vehicle off in an emergency.
If the vehicle cannot be pulled over and
must be turned off while driving, press and
hold ENGINE START/STOP for more than
two seconds, or press twice within
five seconds.
Accessory (Amber Indicator Light) : This
mode allows the use of some electrical
accessories when the engine is off. With the ignition off, pressing the button
one time without the brake pedal applied
will place the ignition system in accessory.
The ignition will switch from accessory to
OFF after five minutes to prevent battery
rundown.
ON/RUN/START (Green Indicator Light) :
This
mode is for driving and starting. With the
ignition off and the brake pedal applied,
pressing the button once will place the
ignition in ON/RUN/START. Once engine
cranking begins, release the button. Engine
cranking will continue until the engine
starts. See Starting the Engine 0191. The
ignition will then remain in ON/RUN.
Service Mode
This power mode is available for service and
diagnostics, and to verify the proper
operation of the malfunction indicator lamp
as may be required for emission inspection
purposes. With the vehicle off and the brake
pedal not applied, pressing and holding
ENGINE START/STOP for more than
five seconds will place the vehicle in Service
Mode. The instruments and audio systems
will operate as they do in ON/RUN, but the
vehicle will not be able to be driven. The engine will not start in Service Mode. Press
ENGINE START/STOP again to turn the
vehicle off.
Starting the Engine
Caution
If you add electrical parts or accessories,
you could change the way the engine
operates. Any resulting damage would
not be covered by the vehicle warranty.
See
Add-On Electrical Equipment 0230.
Caution
Do not try to shift to P (Park) if the
vehicle is moving. If you do, you could
damage the transmission. Shift to P (Park)
only when the vehicle is stopped.
Place the transmission in P (Park) or
N (Neutral). To restart the vehicle when it is
already moving, use N (Neutral) only.
Starting the Vehicle
The remote key must be inside the vehicle
for the ignition to work.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Driving and Operating 193
Shifting Into Park
{Warning
It is dangerous to get out of the vehicle
if the vehicle is not in P (Park) with the
parking brake set. The vehicle can roll.
Do not leave the vehicle when the engine
is running. If you have left the engine
running, the vehicle can move suddenly.
You or others could be injured. To be
sure the vehicle will not move, even
when you are on fairly level ground,
always set the parking brake and shift to
P (Park).
To shift into P (Park): 1. Hold the brake pedal down and set the parking brake. See Electric Parking Brake
0 204.
2. Press the P (Park) switch on the center console. See Dual Clutch Transmission
0 195.
3. Press ENGINE START/STOP to turn the engine off.
If the vehicle is shifted into P (Park) on a
hill, the Electric Parking Brake (EPB) may
apply automatically. The EPB may not release when the EPB switch is used. The
EPB should automatically release when the
vehicle is shifted out of P (Park).Leaving the Vehicle with the Engine
Running
{Warning
It can be dangerous to leave the vehicle
with the engine running. It could
overheat and catch fire.
It is dangerous to get out of the vehicle
if the vehicle is not in P (Park) with the
parking brake firmly set. The vehicle
can roll.
Do not leave the vehicle when the engine
is running. If you have left the engine
running, the vehicle can move suddenly.
You or others could be injured. To be
sure the vehicle will not move, even
when you are on fairly level ground,
always set the parking brake and shift to
P (Park).
If you have to leave the vehicle with the
engine running, be sure the vehicle is in
P (Park) and the parking brake is set before
you leave it.
Shifting out of Park
This vehicle is equipped with an
electronically controlled transmission.
If the vehicle has a battery with low
voltage, try charging or jump starting the
battery. See Jump Starting - North America
0 290.
To shift out of P (Park): 1. Ensure the engine is running.
2. Apply the brake pedal.
3. Press or pull the desired switch on the center console. For N (Neutral) press and
hold the N (Neutral) switch until the N
indicator illuminates red.
The P indicator will turn white and the gear
indicator on the shift switch will turn red
when the vehicle is no longer in P (Park).
If equipped, the Buckle to Drive feature may
prevent shifting from P (Park). See Buckle To
Drive 045.
If the vehicle cannot shift from P (Park), a
Driver Information Center (DIC) message will
display. See your dealer for service.