2015 CHEVROLET CORVETTE GRAND SPORT Owners Manual

Black plate (36,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
9-36 Driving and Operating
normal, and is done to periodically
check the correct operation of the
EPB system.
If the EPB fails to apply, the rear
wheels should be blocked to
prevent vehicle movement.
EPB Release
To release the EPB:
1. Place the ignition in the ACC/ACCESSORY or ON/RUN
position.
2. Apply and hold the brake pedal.
3. Push down momentarily on the EPB switch.
The EPB is released when the red
parking brake status light is off.
If the amber parking brake warning
light is on, release the EPB by
pushing down on the EPB switch
and holding it down. Continue to
hold the switch until the red parking
brake status light is off. If either light
stays on after release is attempted,
see your dealer.
{Caution
Driving with the parking brake on
can overheat the brake system
and cause premature wear or
damage to brake system parts.
Make sure that the parking brake
is fully released and the brake
warning light is off before driving.
Automatic EPB Release
The EPB will automatically release if
the vehicle is running, placed into
gear, and an attempt is made to
drive away. Avoid rapid acceleration
when the EPB is applied, to
preserve parking brake lining life.
The EPB can also be used to
prevent roll back for vehicles with a
manual transmission taking off on a
hill. When no roll back is desired, an
applied EPB will allow both feet to
be used for the clutch and
accelerator pedals in preparation for
starting the vehicle moving in the intended direction. In this case,
there is no need to push the switch
to release the EPB.
Brake Assist
The Brake Assist feature is
designed to assist the driver in
stopping or decreasing vehicle
speed in emergency driving
conditions. This feature uses the
stability system hydraulic brake
control module to supplement the
power brake system under
conditions where the driver has
quickly and forcefully applied the
brake pedal in an attempt to quickly
stop or slow down the vehicle. The
stability system hydraulic brake
control module increases brake
pressure at each corner of the
vehicle until the ABS activates.
Minor brake pedal pulsation or
pedal movement during this time is
normal and the driver should
continue to apply the brake pedal as
the driving situation dictates. The
Brake Assist feature will
automatically disengage when the

Black plate (37,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
Driving and Operating 9-37
brake pedal is released or brake
pedal pressure is quickly
decreased.
Hill Start Assist (HSA)
If equipped, HSA may automatically
activate when the vehicle is stopped
on a grade. This feature is designed
to prevent the vehicle from rolling,
either forward or rearward, during
vehicle drive off. During the
transition from releasing the brake
pedal to accelerating to drive off on
a grade, HSA holds the braking
pressure to prevent rolling. HSA will
not activate if the vehicle is in a
drive gear and facing downhill or if
the vehicle is facing uphill and in
R (Reverse).
Ride Control Systems
Traction Control/
Electronic Stability
Control
The vehicle has a Traction Control
System (TCS) and a StabiliTrak
system. These systems help limit
wheel spin and assist the driver in
maintaining control, especially on
slippery road conditions.
TCS activates if it senses that the
rear wheels are spinning too much
or are beginning to lose traction.
When this happens, TCS applies
the brakes to the spinning wheel
and reduces engine power (by
closing the throttle and managing
engine spark) to limit wheel spin.
StabiliTrak activates when the
vehicle senses a difference between
the intended path and the direction
the vehicle is actually traveling.
StabiliTrak selectively applies
braking pressure to any one of thevehicle wheel brakes to assist the
driver in keeping the vehicle on the
intended path.
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. See
Cruise Control on
page 9-48.
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 on
page 9-13 and“Turning the
Systems Off and On” later in this
section.

Black plate (38,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
9-38 Driving and Operating
The indicator light for both systems
is in the instrument cluster. This
light will:
.Flash when TCS is limiting
wheel spin.
.Flash when StabiliTrak is
activated.
.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
dcomes 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
dcomes 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
dcomes 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 button is on the
center console.
{Caution
Do not repeatedly brake or
accelerate heavily when TCS is
off. The vehicle driveline could be
damaged.
To turn off only TCS, press and
release the
gbutton. The Traction
Off Light
iilluminates in the
instrument cluster. To turn TCS on
again, press and release the
g
button. The Traction Off Lighti
displayed in the instrument cluster
will turn off.
If TCS is limiting wheel spin when
the
gbutton is pressed, the system
will not turn off until the wheels stop
spinning.
To turn off both TCS and StabiliTrak,
press and hold the
gbutton until
the Traction Off Light
iand

Black plate (39,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
Driving and Operating 9-39
StabiliTrak OFF lightgilluminate
and stay on in the instrument
cluster.
To turn TCS and StabiliTrak on
again, press and release the
g
button. The Traction Off Lighti
and StabiliTrak OFF lightgin the
instrument cluster turn off.
If the Tire Pressure Monitor (TPM)
system is malfunctioning and the
DIC displays SERVICE TIRE
MONITOR SYSTEM, StabiliTrak will
be affected as follows:
.StabiliTrak cannot be turned off
by the driver.
.If StabiliTrak is off, it will be
turned on automatically.
.Competitive Driving Mode or
Performance Traction
Management is unavailable.
.StabiliTrak will feel different in
aiding and maintaining
directional control. Adding accessories can affect the
vehicle performance. See
Accessories and Modifications on
page 10-2.
Driver Mode Control
The Driver Mode Selector knob is
on the console behind the shift
lever.
There are five modes for different
driving conditions: Weather, Eco,
Tour, Sport, and Track.
The outer ring turns to change the
modes, which display in the
instrument cluster.
Press the button in the center of the
knob for Stability Control and
Traction Control, or if the vehicle is
in Track mode with Performance
Traction Management (PTM). See
Traction Control/Electronic Stability
Control on page 9-37
or the
information on PTM in Competitive
Driving Mode on page 9-43.
When PTM is active, the outer ring
will change the PTM mode and the
Driver mode will display in the
instrument cluster.

Black plate (40,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
9-40 Driving and Operating
Each mode is configured for use in
different driving conditions. Use:
.Weather mode for rain
and snow.
.Eco mode to improve fuel
economy.
.Tour mode for comfortable
normal driving.
.Sport mode for spirited on road
driving.
.Track mode for track use.There are 12 attributes that vary by
mode shown below. Not all vehicles
have all features, depending on the
vehicle options.

Black plate (41,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
Driving and Operating 9-41
Modes:WEATHER ECO TOUR
DefaultSPORT TRACK
Cluster Display Tour Tour Tour Sport Track
Throttle Progression Weather Normal Normal Sport Sport
Trans Shift Mode (if equipped) Normal Normal Normal Sport Track
Active Fuel Management Normal Eco Normal Normal Normal
Exhaust Mode Eco Eco Tour Sport Track
Steering Comfort Comfort Comfort Sport Track
StabiliTrak Normal Normal Normal Normal Comp Mode
Avail
Electronic Limited Slip (if equipped) Mode 1 Mode 1 Mode 1 Modes 2
& 3Modes 2
& 3
Magnetic Ride (if equipped) Tour Tour Tour Sport Track
Launch Control NA NA NA NA Available
Traction Control Weather Normal Normal Normal Track
Performance Traction or Competitive Driving
Mode (if equipped) Off Off Off Off Available

Black plate (42,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
9-42 Driving and Operating
Driver Mode Selector Attributes
Affected
The Gauge Cluster Display is
configured for each mode when
linked (default):
.Tour: Modern theme which
features displays for audio and
navigation.
.Sport: Classic easy to read
Sports Car gauges.
.Track: Gauges design based on
Corvette Racing display with lap
timer.
Throttle Progression
Adjusts throttle sensitivity by
selecting how quick or slow the
throttle reacts to input.
Transmission Shift Mode −Paddle
Shift Automatic
.Adjusts to either a smoother or
firmer shift.
.Sport –Performance Algorithm
Liftfoot (PAL) recognizes
aggressive throttle maneuvers and holds lower gears for
greater engine braking and
enhanced vehicle control when
not using paddles. (Available in
Sport or Track mode.)
.Track
–Performance Algorithm
Shift (PAS) recognizes
aggressive cornering, heavy
braking, and high acceleration to
select and hold lower gears
when not using paddles.
Active Fuel Management (engine
cylinder shuts off)
4-Cylinder Mode
.Normal with automatic
transmission: The engine uses
8-cylinder mode when
accelerating, but changes to
4-cylinder mode when coasting.
.With manual transmission:
Active Fuel Management only
active in Eco mode.
.Off in Manual mode with
automatic transmission unless in
Eco mode.
.Eco keeps the engine in
4-cylinder mode unless heavy
acceleration is needed.
Exhaust (variable mode exhaust
system)
Changes when the variable exhaust
valves open.
Steering (Assist Effort)
Adjusts from a lighter steering feel
to reduced assist for more
steering feel.
Magnetic Ride Control (if
equipped)
Adjusts the shock dampening
firmness based on driving
conditions to improve comfort and
performance.
Launch Control
Available only in Track mode for
maximum “off–the–line” acceleration
when in Competitive or PTM modes.

Black plate (43,1)Chevrolet Corvette Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576293) - 2015 - crc - 6/17/14
Driving and Operating 9-43
Stability Control
.Competitive Driving Mode allows
less computer control to permit
some slide and drift and is
selected with the
gbutton–only
available in Track mode.
.StabiliTrak can be turned off by
pressing and holding the
g
button for 10 seconds.
PTM (Performance Traction
Management) (if equipped)
.Available in Track mode.
.There are five selectable
settings if Competitive Driving
Mode is activated.
Competitive Driving Mode
If equipped, Competitive Driving
Mode, Performance Traction
Management, 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 the race track. Drivers who
prefer to allow the system to have
more control of the engine, brake,
and suspension are advised to turn
the normal traction control and
StabiliTrak systems on.
{Caution
Attempting to shift when the drive
wheels are spinning and do not
have traction may cause damage
to the transmission. Damage
caused by misuse of the vehicle
is not covered by the vehicle
warranty. Do not attempt to shift
when the drive wheels do not
have traction.
Competitive Driving Mode
(Except Z51 and Z06 with
Magnetic Ride Control)
Competitive Driving Mode allows full
engine power while StabiliTrak
helps maintain directional control of
the vehicle by selective brake
application. In this mode, 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.