2021 CHEVROLET CORVETTE C8 brake light

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 9/22/20
Driving and Operating 215
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 the race track.
Drivers who prefer to allow the system to
have more control of the engine, brakes,
and suspension are advised to turn the
normal traction control and StabiliTrak/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 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.
In order to select this optional handling
mode, the vehicle mode must be Sport or
Track (if equipped with Performance Traction
Management (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.
This light is on when the vehicle is in the
PTM Mode. To select this optional handling
mode, the vehicle mode must be in Track.
Then quickly press
@on the center console
two times. Performance Traction Wet —ESC
On displays in the DIC.
To experience the performance benefit of
this system, after entering a curve and at
the point where normal acceleration occurs,
fully press the accelerator pedal. The PTM
system will modify the level of engine
power for a smooth and consistent
corner exit.
The PTM system contains five modes. These
modes are selected by turning the MODE
switch on the center console. Scroll through
modes 1–5 by turning the mode control dial.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 9/22/20
216 Driving and Operating
The following is a DIC display description
and the recommended usage of each mode:
Performance Traction–Wet
.Intended for all driver skill levels.
.Wet or damp conditions only —not
intended for use in heavy rain or standing
water.
.StabiliTrak/ESC is on and engine power is
reduced based on conditions.
Performance Traction –Dry
.For use by less experienced drivers or
while learning a new track.
.Dry conditions only.
.StabiliTrak/ESC is on and engine power is
slightly reduced.
Performance Traction –Sport
.For use by drivers who are familiar with
the track.
.Dry conditions only.
.Requires more driving skill than mode 2.
.StabiliTrak/ESC is on and more engine
power is available than in mode 2.
Performance Traction –Race 1
.For use by drivers who are familiar with
the track.
.Dry conditions only.
.Requires more driving skill than modes 2
or 3.
.StabiliTrak/ESC is off and available engine
power is the same as mode 3.
Performance Traction –Race 2
.For use by experienced drivers who are
familiar with the track.
.Dry conditions only.
.Requires more driving skill than in other
modes.
.StabiliTrak/ESC is off and engine power is
available for maximum cornering speed.
Press and release
@to turn off PTM and
return to the TCS and StabiliTrak/ESC
systems. The traction off light
iand
StabiliTrak Off light
@will go out.
Launch Control (Sport and Track
Mode Only)
A Launch Control feature is available, within
Competitive Driving Mode or PTM, on all
vehicles to allow the driver to achieve high
levels of vehicle acceleration in a straight
line. Launch Control is a form of TCS that
manages tire spin, and transmissions clutch,
while launching the vehicle. This feature is intended for use during closed course race
events where consistent zero to
60 and quarter mile times are desirable.
Launch Control is only available when the
following criteria are met:
.Competitive Driving Mode or any of the
PTM Modes are selected (if equipped).
.The vehicle is not moving.
.The wheels and steering wheel are
pointing straight.
Launching the Vehicle
.Ensure the vehicle is in Competitive
Driving Mode or any of the PTM modes.
.The brake pedal must be firmly pressed
to the floor, equivalent to a panic brake
event.
.While maintaining the brake pedal, the
accelerator pedal is rapidly applied to
wide open throttle. (If the vehicle rolls
due to wide open throttle, release the
throttle, press the brake pedal more
firmly, and re-apply the accelerator to
wide open throttle.)
The Launch Control feature will initially limit
engine speed as the driver rapidly applies
the accelerator pedal to wide open throttle.
Allow the engine rpm’s to stabilize.
A smooth, quick release of the brake pedal,

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Driving and Operating 219
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.
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.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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230 Vehicle Care
Vehicle Care
General Information
General Information . . . . . . . . . . . . . . . . . . . 231
California Proposition 65 Warning . . . . . 231
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . . . . . . 231
Accessories and Modifications . . . . . . . . . 231
Lifting the Vehicle . . . . . . . . . . . . . . . . . . . . . 232
Vehicle Checks
Doing Your Own Service Work . . . . . . . . . 233
Underhood Compartment Overview . . . 234
Engine Compartment Overview . . . . . . . . 235
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Engine Oil Life System . . . . . . . . . . . . . . . . . 241
Dual Clutch Transmission Fluid . . . . . . . . 241
Dual Clutch Transmission Fluid Life System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Engine Air Filter Life System . . . . . . . . . . 242
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . 243
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . 245
Engine Overheating . . . . . . . . . . . . . . . . . . . 248
Washer Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Battery - North America . . . . . . . . . . . . . . . 251 Park Brake and P (Park) Mechanism
Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
Wiper Blade Replacement . . . . . . . . . . . . . 252
Windshield Replacement . . . . . . . . . . . . . . . 253
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Headlamp Aiming
Front Headlamp Aiming . . . . . . . . . . . . . . . 254
Bulb Replacement
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Electrical System
Electrical System Overload . . . . . . . . . . . . 254
Fuses and Circuit Breakers . . . . . . . . . . . . . 255
Instrument Panel Fuse Block . . . . . . . . . . . 255
Rear Compartment Fuse Block . . . . . . . . . 258
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
All-Season Tires . . . . . . . . . . . . . . . . . . . . . . . . 261
Winter Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Run-Flat Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Low-Profile Tires . . . . . . . . . . . . . . . . . . . . . . . 263
Summer Tires . . . . . . . . . . . . . . . . . . . . . . . . . 263
Tire Sidewall Labeling . . . . . . . . . . . . . . . . . 263
Tire Designations . . . . . . . . . . . . . . . . . . . . . . 264
Tire Terminology and Definitions . . . . . . 265 Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 267
Tire Pressure for High-Speed
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 268
Tire Pressure Monitor System . . . . . . . . . 269
Tire Pressure Monitor Operation . . . . . . 270
Tire Inspection . . . . . . . . . . . . . . . . . . . . . . . . . 272
Tire Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . 272
When It Is Time for New Tires . . . . . . . . 273
Buying New Tires . . . . . . . . . . . . . . . . . . . . . 274
Different Size Tires and Wheels . . . . . . . . 275
Uniform Tire Quality Grading . . . . . . . . . . 275
Wheel Alignment and Tire Balance . . . . 277
Wheel Replacement . . . . . . . . . . . . . . . . . . . 277
Tire Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
If a Tire Goes Flat . . . . . . . . . . . . . . . . . . . . . 278
Jump Starting
Jump Starting - North America . . . . . . . . 278
Towing the Vehicle
Towing the Vehicle . . . . . . . . . . . . . . . . . . . . 281
Recreational Vehicle Towing . . . . . . . . . . . 283
Appearance Care
Exterior Care . . . . . . . . . . . . . . . . . . . . . . . . . . 283
Interior Care . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14622938) - 2021 - CRC - 9/22/20
Vehicle Care 251
.A fluid leak in the brake hydraulic system.
Have the brake hydraulic system fixed.
With a leak, the brakes will not
work well.
Always clean the brake fluid reservoir cap
and the area around the cap before
removing it.
Do not top off the brake fluid. Adding fluid
does not correct a leak. If fluid is added
when the linings are worn, there will be too
much fluid when new brake linings are
installed. Add or remove fluid, as necessary,
only when work is done on the brake
hydraulic system.
Caution
If too much brake fluid is added, the
brake fluid can spill and cause vehicle
damage, including damage to electrical
components and surfaces. Add brake fluid
only when work is done on the brake
hydraulic system.
When the brake fluid falls to a low level,
the brake warning light comes on. See Brake
System Warning Light 087. Brake fluid absorbs water over time which
degrades the effectiveness of the brake fluid.
Replace brake fluid at the specified intervals
to prevent increased stopping distance. See
Maintenance Schedule
0293.
What to Add
Use only GM approved DOT 4 brake fluid
from a clean, sealed container. See
Recommended Fluids and Lubricants 0301.
{Warning
The wrong or contaminated brake fluid
could result in damage to the brake
system. This could result in the loss of
braking leading to a possible injury.
Always use the proper GM approved
brake fluid.
Caution
If brake fluid is spilled on the vehicle's
painted surfaces, the paint finish can be
damaged. Immediately wash off any
painted surface.
Battery - North America
The original equipment battery is
maintenance free. Do not remove the cap
and do not add fluid.
Refer to the replacement number on the
original battery label when a new battery is
needed. For battery replacement, see your
dealer.
{Warning
WARNING: Battery posts, terminals, and
related accessories contain lead and lead
compounds, chemicals known to the
State of California to cause cancer and
birth defects or other reproductive harm.
Batteries also contain other chemicals
known to the State of California to cause
cancer. WASH HANDS AFTER HANDLING.
For more information go to
www.P65Warnings.ca.gov/
passenger-vehicle.
See California Proposition 65 Warning 0231
and the back cover.

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Vehicle Care 257
FusesUsage
F13 –
F14 Glove box F15 –
F16 –
F17 Remote function actuator
F18 Front trunk release
F19 Intelligent battery sensor
F20 Exterior lighting module 1 F21 Exterior lighting module 3
F22 Exterior lighting module 4
F23 Body control module 2
F24 Exterior lighting module 6 F25 Amplifier
F26 Automatic occupant sensing/Electric park
brake
F27 Video processing module
F28 Right headlamp
F29 – Fuses
Usage
F30 Sensing and diagnostic module/Automatic
occupant sensing
F31 Body control module 1
F32 Column lock module
F33 Data link connection/ Wireless charging module
F34 Telematics/Head up display
F35 Horn
F36 –
F37 –
F38 Front wash pump
F39 Rear auxiliary power outlet
F40 Performance data recorder/Center stack
module
F41 –
F42 Theft deterrent
F43 Left headlamp
F44 Exterior lighting module 2 Fuses
Usage
F45 Power steering column module
F46 Body control module 3 F47 Exterior lighting module 5
F48 Exterior lighting module 7
F49 Body control module 4 F50 Front auxiliary power outlet
F51 –
F52 Steering wheel control switch
F53 Heated steering wheel
F54 –
Relays Usage
K1 –
K2 Glove box relay
K3 Horn relay
K4 Front wash relay K5 Retained accessory power/Accessory relay

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Vehicle Care 259
The vehicle may not be equipped with all of
the fuses, relays, and features shown.Fuses Usage
1 Driver memory seat module/Power seat
2 Driver heated seat
3 Passenger memory seat module/Power seat
4 Passenger heated seat Fuses
Usage
5 Transmission control module
6 Rear park assist 7 Power sounder module/ Pedestrian friendly alert
function
8 Side blind zone alert
9 Column lock module Fuses
Usage
10 Engine control module/ Air conditioning
11 –
12 Lithium ion battery module
13 Active fuel management
14 Seat fan 15 –
16 Exterior lighting module 17 Instrument panel cluster/Shifter interface
board/Transmission
control module/
Electronic brake control
module
18 Engine control module
19 –
20 Sensing and diagnostic module/Inside rear view
mirror
21 Exhaust valve solenoid
22 Fuel pump/Fuel tank zone module

Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Vehicle Care 271
The malfunction light and DIC warning
message come on at each ignition cycle
until the problem is corrected. Some of the
conditions that can cause these to come
on are:
.One of the road tires has been replaced
with the spare tire. The spare tire does
not have a TPMS sensor. The malfunction
light and the DIC message should go off
after the road tire is replaced and the
sensor matching process is performed
successfully. See "TPMS Sensor Matching
Process" later in this section.
.The TPMS sensor matching process was
not done or not completed successfully
after rotating the tires. The malfunction
light and the DIC message should go off
after successfully completing the sensor
matching process. See "TPMS Sensor
Matching Process" later in this section.
.One or more TPMS sensors are missing or
damaged. The malfunction light and the
DIC message should go off when the
TPMS sensors are installed and the sensor
matching process is performed
successfully. See your dealer for service.
.Replacement tires or wheels do not match
the original equipment tires or wheels.
Tires and wheels other than thoserecommended could prevent the TPMS
from functioning properly. See
Buying
New Tires 0274.
.Operating electronic devices or being near
facilities using radio wave frequencies
similar to the TPMS could cause the TPMS
sensors to malfunction.
If the TPMS is not functioning properly, it
cannot detect or signal a low tire pressure
condition. See your dealer for service if the
TPMS malfunction light and DIC message
come on and stay on.
Tire Fill Alert (If Equipped)
This feature provides visual and audible
alerts outside the vehicle to help when
inflating an underinflated tire to the
recommended cold tire pressure.
When the low tire pressure warning light
comes on: 1. Park the vehicle in a safe, level place.
2. Set the parking brake firmly.
3. Place the vehicle in P (Park).
4. Add air to the tire that is underinflated. The turn signal lamp will flash.
When the recommended pressure is
reached, the horn sounds once. If the tire
being inflated is a front tire, then the front turn signal lamp closest to the tire
being inflated will stop flashing and
briefly turn solid. If the tire being
inflated is a rear tire, then the rear turn
signal lamp closest to the tire being
inflated will stop flashing.
Repeat these steps for all underinflated tires
that have illuminated the low tire pressure
warning light.
{Warning
Overinflating a tire could cause the tire
to rupture and you or others could be
injured. Do not exceed the maximum
pressure listed on the tire sidewall. See
Tire Sidewall Labeling 0263 and
Vehicle Load Limits 0188.
If the tire is overinflated by more than
35 kPa (5 psi), the horn will sound multiple
times and the turn signal lamp will continue
to flash for several seconds after filling
stops. To release and correct the pressure,
while the turn signal lamp is still flashing,
briefly press the center of the valve stem.
When the recommended pressure is reached,
the horn sounds once.