2021 CHEVROLET CORVETTE cruise control

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
188 Driving and Operating
Winter Driving
Driving on Snow or Ice
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. SeeTraction
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.
.Allow greater following distance and
watch for slippery spots. Icy patches can
occur on otherwise clear roads in shaded
areas. The surface of a curve or an
overpass can remain icy when the
surrounding roads are clear. Avoid sudden
steering maneuvers and braking while
on ice.
.Turn off cruise control.
.Turn on Weather Mode. See Driver Mode
Control 0208.
Blizzard Conditions
Stop the vehicle in a safe place and signal
for help. Stay with the vehicle unless there
is help nearby. If possible, use Roadside
Assistance. See Roadside Assistance Program
0 311. To get help and keep everyone in the
vehicle safe:
.Turn on the hazard warning flashers.
.Tie a red cloth to an outside mirror.
{Warning
Snow can trap engine exhaust under the
vehicle. This may cause exhaust gases to
get inside. Engine exhaust contains
carbon monoxide (CO), which cannot be
seen or smelled. It can cause
unconsciousness and even death.
If the vehicle is stuck in snow:
.Clear snow from the base of the
vehicle, especially any blocking the
exhaust pipe.
(Continued)
Warning (Continued)
.Open a window about 5 cm (2 in) on
the vehicle side that is away from the
wind, to bring in fresh air.
.Fully open the air outlets on or under
the instrument panel.
.Adjust the climate control system to
circulate the air inside the vehicle and
set the fan speed to the highest
setting. See“Climate Control Systems.”
For more information about CO, see
Engine Exhaust 0197.
To save fuel, run the engine for short
periods to warm the vehicle and then shut
the engine off and partially close the
window. Moving about to keep warm also
helps.
If it takes time for help to arrive, when
running the engine, push the accelerator
pedal slightly so the engine runs faster than
the idle speed. This keeps the battery
charged to restart the vehicle and to signal
for help with the headlamps. Do this as
little as possible, to save fuel.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
192 Driving and Operating
{Warning
Things you put inside your vehicle
can strike and injure people in a
sudden stop or turn, or in a crash.
.Put things in the rear area of your
vehicle. Try to spread the weight
evenly.
.Never stack heavier things, like
suitcases, inside the vehicle so
that some of them are above the
tops of the seats.
.Do not leave an unsecured child
restraint in your vehicle.
.When you carry something inside
the vehicle, secure it whenever
you can.
Starting and Operating
New Vehicle Break-In
Follow these recommended guidelines
during the first 2 414 km (1,500 mi) of driving
this vehicle. Parts have a break-in period and
performance will be better in the long run. During the first 800 km (500 mi), engine
torque will be limited in low gears.
For the first 322 km (200 mi):
.To break in new tires, drive at moderate
speeds and avoid hard cornering.
.New brake linings also need a break-in
period. Avoid making hard stops. This is
recommended every time brake linings
are replaced.
For the first 800 km (500 mi):
.Avoid full throttle starts and abrupt stops.
.Do not exceed 4000 rpm.
.Avoid driving at any one constant speed,
fast or slow, including the use of cruise
control.
.Avoid downshifting to brake or slow the
vehicle when the engine speed will
exceed 4000 rpm.
.Do not let the engine labor. Never lug the
engine. This rule applies at all times, not
just during the break-in period.
For the first 2 414 km (1,500 mi):
.Do not participate in track events, sport
driving schools, or similar activities.
.Check engine oil with every refueling and
add if necessary. Oil and fuel
consumption may be higher than normal.
Front Air Dam (and Splitter)
If equipped, the front air dam and splitter
have minimal ground clearance.
Under normal operation, the components
will occasionally contact some road surfaces
(speed bumps, driveway ramps, etc.). This
can be heard inside the vehicle as a scraping
noise. This is normal and does not indicate a
problem.
Use care when approaching bumps or
objects on road surfaces and avoid them
when possible.
If equipped, the Front Lift System may be
used to increase front air dam or splitter
clearance. See Front Lift System 0214.
Composite Materials
This vehicle may be equipped with parts
containing carbon fiber, sheet-molding
compound, or other composite materials.
Dealer-installed accessories may also contain
composite materials. These parts and
accessories may include the splitter or rocker
extensions.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
202 Driving and Operating
Shift mode, the transmission will
automatically upshift if the accelerator pedal
is pressed all the way to the floor.
Manual Paddle Shift can be used with cruise
control. SeeCruise Control 0218.
The vehicle speeds required for Manual
Paddle Shift upshifts depend on several
vehicle inputs, which will vary the allowed
upshift speed by a few km/h (mph).
To prevent damage to the powertrain,
Manual Paddle downshifts to a lower gear
cannot be done above certain speeds. For vehicles with an Electronic Limited-Slip Differential (Z51)
Upshift Allowed (into gear) At Approximately
km/h mph
2nd 15 9 3rd 25 16
4th 36 22 5th 47 29
6th 60 37 7th 76 47
8th 92 57
Maximum Downshift Inhibit Speed (into gear) At Approximately
km/h mph
1st 30 19
2nd 63 39 3rd 104 65
4th 164 102 5th 232 144
6th 304 189 7th 380 236

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
Driving and Operating 207
If cruise control is being used when TCS
begins to limit wheel spin, the cruise control
will automatically disengage. Cruise control
may be reengaged when road conditions
allow. SeeCruise Control 0218.
If the driver disables TCS, cruise control will
disengage. Cruise control will also be
disabled if Performance Traction
Management (PTM) is selected, or if
StabiliTrak is turned off.
Both systems come on automatically when
the vehicle is started and begins to move.
The systems may be heard or felt while
they are operating or while performing
diagnostic checks. This is normal and does
not mean there is a problem with the
vehicle.
It is recommended to leave both systems on
for normal driving conditions, but it may be
necessary to turn TCS off if the vehicle gets
stuck in sand, mud, ice, or snow. See If the
Vehicle Is Stuck 0189 and “Turning the
Systems Off and On” later in this section.
The indicator light for both systems is in the
instrument cluster. This light will:
.Flash when TCS is limiting wheel spin
.Flash when StabiliTrak/ESC is activated
.Flash when ABS is active
.Turn on and stay on when either system
is not working
If either system fails to turn on or to
activate, a message displays in the Driver
Information Center (DIC), and
=comes on
and stays on to indicate that the system is
inactive and is not assisting the driver in
maintaining control. The vehicle is safe to
drive, but driving should be adjusted
accordingly.
If
=comes on and stays on:
1. Stop the vehicle.
2. Turn the engine off and wait 15 seconds.
3. Start the engine. Drive the vehicle. If
=comes on and
stays on, the vehicle may need more time
to diagnose the problem. If the condition
persists, see your dealer.
Turning the Systems Off and On
The TCS/StabiliTrak/ESC button is on the
center console.
Caution
Do not repeatedly brake or accelerate
heavily when TCS is off. The vehicle
driveline could be damaged.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
218 Driving and Operating
Limited-Slip Differential
(Without Z51)
The mechanical limited-slip differential can
give more traction on snow, mud, ice, sand,
or gravel. It works like a standard axle most
of the time, but when traction is low, this
feature allows the drive wheel with the
most traction to move the vehicle. See
Competitive Driving Mode0215 and
Maintenance Schedule 0293.
Limited-Slip Differential (With Z51)
The Electronic Limited-Slip Differential (eLSD)
is a hydraulically actuated clutch system
inside the transaxle. It can infinitely vary
the clutch engagement between 0 and
2250 N*m (1659 lb-ft) of breakaway torque
between the rear wheels. When necessary it
responds from open to full engagement in
fractions of a second. Smaller clutch
adjustments happen even faster.
The eLSD:
.Uses the vehicle sensors and driver inputs
to determine the optimum amount of
clutch engagement for the conditions.
.Improves traction while cornering by
changing the engagement to achieve a
balance between directional control and
acceleration.
.Provides optimal engagement for
high-speed control and stability without
affecting precise steering and turn-in.
.Improves vehicle stability during spirited
driving and evasive maneuvers. It is fully
integrated with the Active Handling and
Performance Traction Management (PTM)
systems (if equipped).
There are unique calibrations based on the
Traction Control System (TCS) setting. eLSD
modes change automatically when the
traction control button is pressed. No unique
input from the driver is required.
.Mode 1 is the standard mode when the
vehicle is started. It provides a touring
calibration with an emphasis on vehicle
stability. Mode 1 is also used in PTM
Wet mode.
.Mode 2 is engaged when both TCS and
StabiliTrak are turned off. This calibration
provides more nimble corner turn-in, and
is biased for better traction out of
corners.
.Mode 3 is engaged when PTM is engaged
in Dry, Sport 1 & 2, and Race modes. This
is a nimble calibration with similar
functionality as eLSD Mode 2, however, it
is integrated to work with PTM.
.Mode 4 is engaged when TCS is selected
off, but StabiliTrak remains on. Vehicle
stability is still the priority, while allowing
for optimized traction out of corners.
Cruise Control
With cruise control, a speed of about
40 km/h (25 mph) or more can be
maintained without keeping your foot on
the accelerator. Cruise control does not work
at speeds below about 40 km/h (25 mph).
{Warning
Cruise control can be dangerous where
you cannot drive safely at a steady
speed. Do not use cruise control on
winding roads or in heavy traffic.
Cruise control can be dangerous on
slippery roads. On such roads, fast
changes in tire traction can cause (Continued)

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
Driving and Operating 219
Warning (Continued)
excessive wheel slip, and you could lose
control. Do not use cruise control on
slippery roads.
If the Traction Control System (TCS) begins
to limit wheel spin while you are using
cruise control, the cruise control
automatically disengages. See Traction
Control/Electronic Stability Control 0206.
When road conditions allow for using safely
again, cruise control can be turned back on.
If the brakes are applied, cruise control
disengages.
Cruise control will disengage if either TCS or
StabiliTrak/Electronic Stability Control (ESC)
is turned off.
1: Press to turn cruise control on or off.
A white indicator comes on in the
instrument cluster when cruise is turned on.
+RES : If there is a set speed in memory,
press briefly to resume to that speed or
press and hold to accelerate. If cruise control
is already engaged, use to increase vehicle
speed.
SET– :Press briefly to set the speed and
activate cruise control. If cruise control is
already engaged, use to decrease vehicle
speed.
*: Press to disengage cruise control
without erasing the set speed from memory. The speedometer reading can be displayed
in either English or metric units. See
Instrument Cluster
080. The increment
value used depends on the units displayed.
Setting Cruise Control
If
1is on when not in use, SET– or +RES
could get pressed and go into cruise when
not desired. Keep
1off when cruise is not
being used.
1. Press
1to turn the cruise system on.
2. Get up to the desired speed.
3. Press and release SET– on the steering
wheel.
4. Remove foot from the accelerator.
The cruise control indicator on the
instrument cluster turns green after cruise
control has been set to the desired speed.
See Instrument Cluster 080.
Resuming a Set Speed
If the cruise control is set at a desired speed
and then the brakes are applied or
*is
pressed, the cruise control is disengaged
without erasing the set speed from memory.
Once the vehicle reaches about 40 km/h
(25 mph) or more, briefly press +RES. The
vehicle returns to the previous set speed.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
220 Driving and Operating
Increasing Speed While Using Cruise Control
Do one of the following:
.Press and hold +RES until the desired
speed is reached, then release it.
.To increase vehicle speed in small
increments, briefly press +RES. For each
press, the vehicle goes about 1 km/h
(1 mph) faster.
Reducing Speed While Using Cruise Control
Do one of the following:
.Press and hold SET– until the desired
lower speed is reached, then release it.
.To decrease the vehicle speed in small
increments, briefly press SET–. For each
press, the vehicle goes about 1 km/h
(1 mph) slower.
Passing Another Vehicle While Using Cruise
Control
Use the accelerator pedal to increase the
vehicle speed. When you take your foot off
the pedal, the vehicle will slow down to the
previously set cruise speed.
While pressing the accelerator pedal or
shortly following the release to override
cruise control, briefly pressing SET– will
result in cruise set to the current vehicle
speed. Using Cruise Control on Hills
How well the cruise control works on hills
depends upon the vehicle speed, load, and
the steepness of the hills. When going up
steep hills, you may have to step on the
accelerator pedal to maintain your speed.
When going downhill, you may have to
brake or shift to a lower gear to keep your
speed down. If the brake pedal is applied,
cruise control will disengage.
Cruise Control in Manual Paddle Shift Gear
Selection
When the vehicle is in M (Manual Mode)
and the manual paddle shift controls are not
being used, cruise control operates in the
same manner as D (Drive).
When the vehicle is in M (Manual Mode)
and the manual paddle shift controls are
being used, cruise control operates as
follows:
.If cruise control is active and a gear is
selected with the manual paddle shift
controls, the vehicle speed is maintained
in the driver selected gear and will not
automatically upshift or downshift the
transmission while the driver’s gear
selection is active.
.If driving in hilly terrain, cruise control
may not be able to maintain vehicle
speed if an upshift or downshift is not
selected by the driver. While driving on
hilly terrain and cruise control is active
with a manual paddle shift gear selection,
the driver must select the proper gear for
the terrain or select D (Drive) on the
shifter for full automatic transmission
operation.
Ending Cruise Control
.Step lightly on the brake pedal.
.Shift the transmission to N (Neutral).
.Press*.
.To turn off cruise control, press1.
Erasing Speed Memory
The cruise control set speed is erased from
memory if
1is pressed or if the ignition is
turned off.
Driver Assistance Systems
This vehicle may have features that work
together to help avoid crashes or reduce
crash damage while driving, backing, and
parking. Read this entire section before
using these systems.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 2/10/21
Index 329
Control of a Vehicle . . . . . . . . . . . . . . . . . . . . . .178
ControlsSteering Wheel . . . . . . . . . . . . . . . . . . . . . . . . . 114
Convenience Net . . . . . . . . . . . . . . . . . . . . . . . . . . .72
Convertible Top . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Coolant Engine Temperature Gauge . . . . . . . . . . . . . 84
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Courtesy Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Courtesy Transportation Program . . . . . . . . . 313
Coverage Explanations . . . . . . . . . . . . . . . . . . . . 137
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . .218 Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Cupholders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Customer Assistance . . . . . . . . . . . . . . . . . . . . . 310
Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Text Telephone (TTY) Users . . . . . . . . . . . . 310
Customer Information Publications Ordering Information . . . . . 315
Customer Satisfaction Procedure . . . . . . . . . 308
Cybersecurity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
D
Damage Repair, Collision . . . . . . . . . . . . . . . . . .314
Danger, Warning, and Caution . . . . . . . . . . . . . .2 Data Collection
Infotainment System . . . . . . . . . . . . . . . . . . 318
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
Data Recorder Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Data Recorders, Event . . . . . . . . . . . . . . . . . . . .318
Database Coverage Explanations . . . . . . . . . . 137
Daytime Running Lamps (DRL) . . . . . . . . . . . 107
Defensive Driving . . . . . . . . . . . . . . . . . . . . . . . . .178
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Destination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Diagnostics Connected Services . . . . . . . . . . . . . . . . . . . . 326
Differential, Limited-Slip . . . . . . . . . . . . . . . . . .218
Distracted Driving . . . . . . . . . . . . . . . . . . . . . . . . . 177
Diversity Antenna System . . . . . . . . . . . . . . . . 121
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . 16
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Drive Belt Routing, Engine . . . . . . . . . . . . . . . 307
Driver
Teen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Driver Assistance Systems . . . . . . . . . . . . . . . 220
Driver Information Center (DIC) . . . . . . . . . . . 92
Driver Mode Control . . . . . . . . . . . . . . . . . . . . . 208
Driving Better Fuel Economy . . . . . . . . . . . . . . . . . . . . 177 Driving (cont'd)
Competitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Hill and Mountain Roads . . . . . . . . . . . . . . 187
If the Vehicle is Stuck . . . . . . . . . . . . . . . . . 189
Impaired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . 180
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . 179
Track Events and Competitive . . . . . . . . . . 180
Vehicle Load Limits . . . . . . . . . . . . . . . . . . . . 189
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Dual Clutch Transmission . . . . . . . . . . . . . . . . 198 Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . 201
Dual Clutch Transmission Fluid . . . . . . . . . . . .241
Dual Clutch Transmission Fluid Life System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
E
Electric Brake Boost . . . . . . . . . . . . . . . . . . . . . . 204
Electric Parking Brake . . . . . . . . . . . . . . . . . . . . 205
Electric Parking Brake Light . . . . . . . . . . . . . . . 88
Electrical Equipment, Add-On . . . . . . . . . . . . 229
Electrical SystemFuses and Circuit Breakers . . . . . . . . . . . . . 255
Instrument Panel Fuse Block . . . . . . . . . . . 256