automatic transmission CHEVROLET CORVETTE 2009 6.G User Guide

The vehicle has a Computer-Controlled Cranking
System. This feature assists in starting the engine and
protects components. Once cranking has been initiated,
the engine continues cranking for a few seconds or until
the vehicle starts. If the engine does not start, cranking
automatically stops after 15 seconds to prevent cranking
motor damage. To prevent gear damage, this system
also prevents cranking if the engine is already running.
Notice:The engine is designed to work with
the electronics in the vehicle. If electrical parts or
accessories are added, you could change the way the
engine operates. Before adding electrical equipment,
check with your dealer/retailer. If you do not, the
engine might not perform properly. Any resulting
damage would not be covered by the vehicle
warranty.Stopping the Engine
If the vehicle has an automatic transmission, move
the shift lever to P (Park) and press and hold the
Acc. (Off/Accessory) button, located on the instrument
panel, until the engine shuts off. If the shift lever is not
in P (Park), the engine shuts off and the vehicle goes
into the Accessory Mode. The DIC displays SHIFT TO
PARK. Once the shifter is moved to P (Park), the vehicle
turns off. If the vehicle has a manual transmission,
it is recommended that you move the shift lever to
R (Reverse) and set the parking brake after you turn off
the engine by pressing the Acc. (Off/Accessory) button.
If the keyless access transmitter is not detected inside
the vehicle when it is turned to off, the DIC displays
NO FOB – OFF OR RUN?.
SeeDIC Warnings and Messages on page 3-54for
more information.
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Automatic Transmission Operation
There are several different
positions for the shift lever.
P (Park):This position locks the rear wheels. It is the
best position to use when starting the engine because
the vehicle cannot move easily.{CAUTION:
It is dangerous to get out of the vehicle if the shift
lever is not fully in P (Park) with the parking brake
rmly set. The vehicle can roll.
Do not leave the vehicle when the engine is
running unless you have to. 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
move the shift lever to P (Park). SeeShifting Into
Park (Automatic Transmission) on page 2-33.
Be sure the shift lever is fully in P (Park) before starting
the engine.
The vehicle has an automatic transmission shift lock
control system. You have to fully apply the brakes and
then press the shift lever button before you can shift
from P (Park) when the vehicle is running. If you cannot
shift out of P (Park), ease pressure on the shift lever
and push the shift lever all the way into P (Park) as you
maintain brake application. Then press the shift lever
button and move the shift lever into another gear.
SeeShifting Out of Park on page 2-34.
2-26

R (Reverse):Use this gear to back up.
Notice:Shifting to R (Reverse) while the vehicle is
moving forward could damage the transmission.
The repairs would not be covered by the vehicle
warranty. Shift to R (Reverse) only after the vehicle
is stopped.
To rock the vehicle back and forth to get out of snow,
ice, or sand without damaging the transmission, seeIf
Your Vehicle is Stuck in Sand, Mud, Ice, or Snow on
page 4-21.
N (Neutral):In this position, the engine does not
connect with the wheels. To restart the engine when
the vehicle is already moving, use N (Neutral) only.
If the vehicle needs towing, seeTowing Your Vehicle
on page 4-28.
{CAUTION:
Shifting into a drive gear while the engine is
running at high speed is dangerous. Unless your
foot is rmly on the brake pedal, the vehicle could
move very rapidly. You could lose control and hit
people or objects. Do not shift into a drive gear
while the engine is running at high speed.Notice:Shifting out of P (Park) or N (Neutral) with
the engine running at high speed may damage the
transmission. The repairs would not be covered by
the vehicle warranty. Be sure the engine is not
running at high speed when shifting the vehicle.
D (Drive):This position is for normal driving. It provide
the best fuel economy. If you need more power for
passing, and you are:
Going less than about 35 mph (56 km/h), push the
accelerator pedal about halfway down.
Going about 35 mph (56 km/h) or more, push the
accelerator all the way down.
Downshifting the transmission in slippery road conditions
could result in skidding, see “Skidding” underLoss of
Control on page 4-13.
S (Sport Mode):When in S (Sport Mode), the
transmission will work as an automatic until you use the
Manual Paddle Shift Controls, which activates driver
manual gear selection. See Manual Paddle Shift later in
this section. While in S (Sport Mode), the transmission’s
computer determines when the vehicle is being driven
in a competitive manner and will select and hold the
transmission in lower gears and have more noticeable
upshifts for sportier vehicle performance.
2-27

Manual Paddle Shift
While in the S (Sport Mode) position, the paddles
located on the steering wheel can be used to manually
up-shift or down-shift the transmission.
While in S (Sport Mode), push the paddle above the
steering wheel spokes to up-shift to the next gear, or
pull on the paddle behind the steering wheel spokes to
down-shift to the next gear.
To use the system, shift from P (Park) position to
S (Sport Mode) while stopped and with the engine
running, or from D (Drive) with the vehicle moving.When accelerating the vehicle from a stop in snowy and
icy conditions, you may want to shift to 2 (Second) or
3 (Third) gear. A higher gear allows you to gain more
traction on slippery surfaces. If traction control is active,
upshifts are delayed to increase your control of the
vehicle. SeeTraction Control System (TCS) on page 4-6.
While the Manual Paddle Shift gear selection system
is active, the transmission will automatically downshift
through the gears as the vehicle slows. The transmission
will select 2 (Second) gear as the vehicle stops. From a
stop, the vehicle will start from and hold 2 (Second) gear
unless the driver manually paddle shifts into a different
gear or selects D (Drive). The driver can select 1 (First)
gear for maximum acceleration from a stop.
When using the Manual
Paddle Shift feature while
in S (Sport Mode), the
current gear will be
displayed in the Driver
Information (DIC), or the
Head-Up Display (HUD),
if the vehicle has either of
these features.
If the vehicle has a Navigation system, see “Head-Up
Display (HUD)” in the Index of the navigation manual.
2-28

The Manual Paddle Shift system will not allow either an
up-shift or a down-shift if the vehicle speed is too fast
or too slow, nor will it allow a start from 4 (Fourth) or
higher gear
If up-shifting does not occur when needed, vehicle
speed will be limited to protect the engine.
The transmission will also automatically down-shift as
the vehicle slows down and comes to a stop.
When the transmission gear does not respond to a shift
change, the DIC will show an X over the gear display.
When a requested shift is
denied due to the speed
restrictions shown, the DIC
will momentarily show
an X over the gear display
and a chime will sound.
If the vehicle has a HUD, and the transmission gear
does not respond to a shift change, a chime will sound
and the HUD will momentarily show an X over the
gear display.
Manual Paddle Shift operation is available for use with
Cruise Control. SeeCruise Control on page 3-10for
more information.The vehicle speeds required for Manual Paddle Shift
up-shifts depend on several vehicle inputs, which
will vary the allowed up-shift speed by a few mph (km/h).
Up-shifts to 4 (Fourth) gear require approximately
22 mph (35 km/h).
Up-shifts to 5 (Fifth) gear require approximately
28 mph (45 km/h).
Up-shifts to 6 (Sixth) gear require approximately
41 mph (65 km/h).
To prevent damage to the powertrain, Manual Paddle
downshifts to a lower gear cannot be done above certain
speeds. The maximum speed allowed for downshifting
of gears 1 (First) through 4 (Fourth) are:
Into 4 (Fourth) gear over 168 mph (270 km/h)
Into 3 (Third) gear over 124 mph (200 km/h)
Into 2 (Second) gear over 81 mph (130 km/h)
Into 1 (First) gear over 45 mph (72 km/h).
If the driver does not request an upshift as the engine
speed approaches fuel shut off RPM, the engine
speed will be limited to protect the engine. See
Tachometer on page 3-34for more information.
2-29

Shifting Into Park
(Automatic Transmission)
{CAUTION:
It can be dangerous to get out of the vehicle if the
shift lever is not fully in P (Park) with the parking
brake rmly set. The vehicle can roll. 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, use the steps that follow.
1. Hold the brake pedal set the parking brake.
SeeParking Brake on page 2-32for more
information.
2. Move the shift lever into P (Park) by holding in the
button on the lever and pushing the lever all the
way toward the front of the vehicle.
3. Press the Acc. button (ignition switch) to turn the
engine off.
Leaving the Vehicle With the Engine
Running (Automatic Transmission)
{CAUTION:
It can be dangerous to leave the vehicle with the
engine running. The vehicle could move suddenly
if the shift lever is not fully in P (Park) with the
parking brake rmly set. And, if you leave the
vehicle with the engine running, it could overheat
and even catch re. You or others could be
injured. Do not leave the vehicle with the engine
running.
If you have to leave the vehicle with the engine running,
be sure the vehicle is in P (Park) and the parking brake is
rmly set before you leave it. After you have moved the
shift lever into P (Park), hold down the regular brake
pedal. See if you can move the shift lever away from
P (Park) without rst pushing the button on the lever.
If you can, it means that the shift lever was not fully
locked into P (Park).
2-33

Torque Lock (Automatic Transmission)
If you are parking on a hill and you do not shift the
transmission into P (Park) properly, the weight of the
vehicle may put too much force on the parking pawl in
the transmission. You may nd it difficult to pull the
shift lever out of P (Park). This is called “torque lock.”
To prevent torque lock, set the parking brake and
then shift into P (Park) properly before you leave the
driver seat. To nd out how, see “Shifting Into P (Park)”
listed previously in this section.
When you are ready to drive, move the shift lever out of
P (Park) before you release the parking brake.
If torque lock does occur, you may need to have another
vehicle push yours a little uphill to take some of the
pressure from the transmission parking pawl, so you
can pull the shift lever out of P (Park).
Shifting Out of Park
Shift lock release prevents shifting out of P (Park)
unless the vehicle is running or in Accessory mode
and the brake pedal is applied.
The shift lock release is always functional except in
the case of an uncharged or low voltage (less than
9-volt) battery. SeeJump Starting on page 5-51
for more information.To shift out of P (Park) use the following:
1. Apply the brake pedal.
2. Press the shift lever button.
3. Move the shift lever to the desired position.
If you still are unable to shift out of P (Park):
1. Fully release the shift lever button.
2. While holding down the brake pedal, press the shift
lever button again.
3. Move the shift lever to the desired position.
If you still cannot move the shift lever from P (Park),
consult your dealer/retailer or a professional towing
service.
Parking the Vehicle
(Manual Transmission)
Before you get out of the vehicle, move the shift lever
into R (Reverse) and rmly apply the parking brake.
Once the shift lever has been placed into R (Reverse)
with the clutch pedal pressed in, you can turn the ignition
off and release the clutch.
2-34

Running the Vehicle While Parked
It is better not to park with the engine running. But if you
ever have to, here are some things to know.
{CAUTION:
Idling a vehicle in an enclosed area with poor
ventilation is dangerous. Engine exhaust may
enter the vehicle. Engine exhaust contains Carbon
Monoxide (CO) which cannot be seen or smelled.
It can cause unconsciousness and even death.
Never run the engine in an enclosed area that
has no fresh air ventilation. For more information,
seeEngine Exhaust on page 2-35.
{CAUTION:
It can be dangerous to get out of the vehicle if
the automatic transmission shift lever is not fully
in P (Park) with the parking brake rmly set. The
vehicle can roll. Do not leave the vehicle when the
engine is running unless you have to. 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 move the shift lever to P (Park).
Follow the proper steps to be sure the vehicle will not
move. SeeShifting Into Park (Automatic Transmission)
on page 2-33.
2-36

Removing the Roof Panel
{CAUTION:
Do not try to remove a roof panel while the vehicle
is moving. Trying to remove the roof panel while the
vehicle is moving could cause an accident. The
panel could fall into the vehicle and cause you to
lose control, or it could y off and strike another
vehicle. You or others could be injured. Remove
the roof panel only when the vehicle is parked.
Until you are sure you can remove the panel alone,
have someone help you.
Notice:If you drop or rest a roof panel on its
edges, the roof panel, paint and/or weather-stripping
may be damaged. Always place the roof panel in
the stowage receivers after removing it from
the vehicle.
1. Park on a level surface and set the parking brake.
Shift an automatic transmission into P (Park). Shift
a manual transmission into N (Neutral).
2. Make sure the ignition is off.3. Lower both sun visors.
4. Open the rear hatch and remove any items that
may interfere with proper storage of the roof panel.
5. Lower the windows.
There are two release latches on the front of the
roof panel and one rear release latch on the back
of the roof panel.
6. To unlock the release latches on the front of the
roof panel, grasp each handle and pull it outward.
2-55

3. Gently place the roof
panel down so that
the back pins on the
roof panel drop into the
receivers in the back of
the storage area.
Press down rmly to seat the pins in the receivers.Installing the Roof Panel
{CAUTION:
An improperly attached roof panel may fall into or
y off the vehicle. You or others could be injured.
After installing the roof panel, always check that it
is rmly attached by pushing up on the underside
of the panel. Check now and then to be sure the
roof panel is rmly in place.
Notice:If you drop or rest a roof panel on its
edges, the roof panel, paint and/or weather-stripping
may be damaged. Always place the roof panel in the
stowage receivers after removing it from the vehicle.
In most cases, it makes it easier if two people install the
roof panel.
1. Park on a level surface and set the parking brake.
Shift an automatic transmission into P (Park).
Shift a manual transmission into N (Neutral).
2. Check that the front release latches and the rear
release latch on the vehicle’s roof opening are
in their opened positions before attempting to
install the roof panel.
2-58