2005 PONTIAC GRAND PRIX Owners Manual

Automatic Transaxle Operation
The shift lever for the automatic transaxle is located on
the console between the seats.
Maximum engine speed is limited when the vehicle is
in PARK (P) or NEUTRAL (N) to protect driveline
components from improper operation.
There are several
different positions for
the shift lever.
PARK (P):This position locks the front wheels.
It is the best position to use when the engine is
started because the vehicle cannot move easily.{CAUTION:
It is dangerous to get out of your vehicle if the
shift lever is not fully in PARK (P) with the
parking brake rmly set. Your vehicle can roll.
Do not leave your 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 your vehicle will not move, even
when you are on fairly level ground, always
set your parking brake and move the shift
lever to PARK (P). SeeShifting Into Park (P)
on page 2-31. If you are pulling a trailer, see
Towing a Trailer on page 4-40.
Make sure the shift lever is fully in PARK (P) before
starting the engine. The vehicle has an automatic
transaxle shift lock control system. The regular
brakes must be fully applied and the shift control
button, located on the front of the shift lever,
must be pressed before the vehicle can be shifted
from PARK (P) when the ignition is in RUN.
2-25

If the vehicle cannot be shifted out of PARK (P), ease
pressure on the shift lever by pushing it all the way into
PARK (P) while keeping the brake pedal pushed
down. Release the shift lever button. Then move the
shift lever out of PARK (P), being sure to press the shift
lever button. SeeShifting Out of Park (P) on page 2-32.
REVERSE (R):Use this gear to back up.
Notice:Shifting to REVERSE (R) while your vehicle
is moving forward could damage the transaxle.
The repairs would not be covered by your warranty.
Shift to REVERSE (R) only after your vehicle is
stopped.
To rock the vehicle back and forth to get out of snow,
ice or sand without damaging the transaxle, seeIf
You Are Stuck: In Sand, Mud, Ice or Snow on
page 4-32.
NEUTRAL (N):In this position, the engine does not
connect with the wheels. To restart when the vehicle
is already moving, use NEUTRAL (N) only. Also,
use NEUTRAL (N) when the vehicle is being towed.
{CAUTION:
Shifting into a drive gear while your engine is
running at high speed is dangerous. Unless
your foot is rmly on the brake pedal, your
vehicle could move very rapidly. You could
lose control and hit people or objects. Do not
shift into a drive gear while your engine is
running at high speed.
Notice:Shifting out of PARK (P) or NEUTRAL (N)
with the engine racing may damage the transaxle.
The repairs would not be covered by your warranty.
Be sure the engine is not racing when shifting
your vehicle.
AUTOMATIC OVERDRIVE (D):This position is for
normal driving. If the vehicle needs more power
for passing, and it is:
Going less than 35 mph (55 km/h), push the
accelerator pedal about halfway down.
Going about 35 mph (55 km/h) or more, push
the accelerator pedal all the way down.
2-26

The vehicle will shift down to the next gear and have
more power.
Notice:If your vehicle seems to start up rather
slowly or not shift gears when you go faster, and
you continue to drive your vehicle that way, you
could damage the transaxle. Have your vehicle
serviced right away. You can drive in SECOND (2)
when you are driving less than 35 mph (55 km/h)
and AUTOMATIC OVERDRIVE (D) for higher speeds
until then.
THIRD (3):This position is also used for normal driving,
but it offers more power and lower fuel economy than
AUTOMATIC OVERDRIVE (D).
Here are some times THIRD (3) could be used instead
of AUTOMATIC OVERDRIVE (D):
When driving on hilly, winding roads.
When towing a trailer, so there is less shifting
between gears.
When going down a steep hill.
When driving in non-highway scenarios
(i.e. city streets, etc.).SECOND (2):This position gives the vehicle more
power but lower fuel economy than THIRD (3).
SECOND (2) can be used on hills. It can help control
the vehicle’s speed as it goes down steep mountain
roads, but then you would also want to use the brakes
off and on.
Notice:Driving in SECOND (2) for more than
25 miles (40 km) or at speeds over 55 mph (90 km/h)
may damage the transaxle. Also, shifting into
SECOND (2) at speeds above 65 mph (105 km/h) can
cause damage. Drive in THIRD (3) or AUTOMATIC
OVERDRIVE (D) instead of SECOND (2).
FIRST (1):This position gives the vehicle even more
power but lower fuel economy than SECOND (2). It can
be used on very steep hills, or in deep snow or mud.
If the shift lever is moved to FIRST (1), the transaxle will
not shift into rst gear until the vehicle is going slowly
enough.
Notice:Spinning the tires or holding the vehicle
in one place on a hill using only the accelerator
pedal may damage the transaxle. If you are stuck,
do not spin the tires. When stopping on a hill,
use the brakes to hold the vehicle in place.
2-27

Performance Shifting with TAP-Shift™
If the vehicle is equipped
with the 3800 V6
Supercharged engine,
it may have a console
gearshift with a
MANUAL (M) position.
The other gearshift positions available are
PARK (P), REVERSE (R), NEUTRAL (N) and
AUTOMATIC OVERDRIVE (D), and operate
as explained earlier in this section.While in the MANUAL (M) position, the paddles, located
on the steering wheel, can be used to up-shift or
down-shift the transaxle, under certain circumstances.
While in the MANUAL (M)
mode, push either paddle
once to up-shift to the
next gear. Pull either
paddle once to down-shift
to the next gear.
To fully use the system, select MANUAL (M) while
stopped, with the engine running. The vehicle will begin
moving in rst gear upon acceleration. For better
control in icy or slippery conditions, the vehicle may
start out in second gear, rather than rst gear.
2-28

The up-shift indicator light
on the instrument panel
cluster, or the up-shift
symbol on the Head-Up
Display (HUD), if equipped,
is given as a prompt to
use the TAP-Shift ™
paddle.
The up-shift indicator light will only appear in the
instrument panel cluster if the HUD is off or if the
vehicle does not have HUD.
This prompt to up-shift, as needed, will be given
throughout acceleration. If up-shifting does not occur
when prompted, the vehicle speed will be limited
to protect the engine.Press the accelerator while driving in the highest
gear (fourth gear) which is between 20 and 50 mph to
make the transaxle automatically down-shift. As
you’re speed gets closer to 50 mph, more effort will
be required to press the acclerator. At 50 mph, even
with the accelerator fully depressed, the transaxle
will always remain in the 4th gear. The transaxle will
also automatically down-shift as the vehicle decelerates
and comes to a stop.
When a paddle is pushed or pulled a chime will sound
when the vehicle cannot respond to a transaxle gear
change. The 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 THIRD (3) or higher gear.
The MANUAL (M) gear can also be selected while
the vehicle is already moving. The current transaxle
position will continue to be displayed on the Driver
Information Center (DIC) and HUD, if equipped.
2-29

Parking Brake
The parking brake is
located to the left of the
brake pedal near the
driver’s door. To set the
parking brake, hold
the regular brake pedal
down with the right
foot. Push down on the
parking brake pedal,
with the left foot.
To release the parking brake, hold the regular brake
pedal down with the right foot and push the parking
brake pedal with the left foot. When the left foot is lifted,
the parking brake pedal will lift to the released position.
A warning chime will sound if the parking brake is
set, the ignition is on, and the shift lever is not in
PARK (P) or NEUTRAL (N).The brake light will also appear on the instrument panel
cluster when the parking brake is set. It will stay on if
the parking brake does not release fully.
The PARKING BRAKE ON message will also appear in
the Driver Information Center (DIC) when the parking
brake is set.
Notice:Driving with the parking brake on can
overheat the brake system and cause premature
wear or damage to brake system parts. Verify that
the parking brake is fully released and the brake
warning light is off before driving.
If the vehicle is towing a trailer and parked on a hill,
seeTowing a Trailer on page 4-40. That section shows
what to do rst to keep the trailer from moving.
2-30

Shifting Into Park (P)
{CAUTION:
It can be dangerous to get out of your vehicle if
the shift lever is not fully in PARK (P) with the
parking brake rmly set. Your vehicle can roll.
If you have left the engine running, the vehicle
can move suddenly. You or others could be
injured. To be sure your vehicle will not move,
even when you are on fairly level ground, use
the steps that follow. If you are pulling a trailer,
seeTowing a Trailer on page 4-40.
1. Hold the brake pedal down with your right foot and
set the parking brake.
2. Move the shift lever into PARK (P) by holding in the
button on the shift lever and pushing the shift lever
all the way toward the front of the vehicle.
3. Turn the ignition key to OFF.
4. Remove the key and take it with you. If you can
leave your vehicle with the ignition key in your
hand, your vehicle is in PARK (P).
Leaving Your Vehicle With the
Engine Running
{CAUTION:
It can be dangerous to leave your vehicle with
the engine running. Your vehicle could move
suddenly if the shift lever is not fully in
PARK (P) 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
your vehicle with the engine running.
If you have to leave your vehicle with the engine
running, be sure your vehicle is in PARK (P) and your
parking brake is rmly set before you leave it. After you
have moved the shift lever into PARK (P), hold the
regular brake pedal down. Then, see if you can move
the shift lever away from PARK (P) without rst pushing
the button.
If you can, it means that the shift lever was not fully
locked in PARK (P).
2-31

Torque Lock
If you are parking on a hill and you do not shift your
transaxle into PARK (P) properly, the weight of the
vehicle may put too much force on the parking pawl in
the transaxle. You may nd it difficult to pull the shift
lever out of PARK (P). This is called “torque lock.”
To prevent torque lock, set the parking brake and then
shift into PARK (P) properly before you leave the
driver’s seat. To nd out how, seeShifting Into Park (P)
on page 2-31.
When you are ready to drive, move the shift lever out of
PARK (P)beforeyou release the parking brake.
If torque lock does occur, you may need to have another
vehicle push your vehicle a little uphill to take some of
the pressure from the parking pawl in the transaxle,
so you can pull the shift lever out of PARK (P).
Shifting Out of Park (P)
The vehicle has an automatic transaxle shift lock control
system which locks the shift lever in PARK (P) when
the ignition is in OFF. In addition, the regular brakes
must be fully applied before shifting from PARK (P) while
the ignition is in RUN. SeeAutomatic Transaxle
Operation on page 2-25.
If the vehicle cannot be shifted out of PARK (P), ease
pressure on the shift lever and push the shift lever
all the way up into PARK (P) as brake application
is maintained. Then move the shift lever into the
desired gear.
If the brake pedal is held down but the vehicle still
cannot be shifted out of PARK (P), try this:
1. Turn the key to ACC. There is no shift interlock in
this key position.
2. Apply and hold the brake until the end of Step 4.
3. Shift the transaxle to NEUTRAL (N).
4. Start the vehicle and then shift to the desired
transaxle gear.
5. Have the system xed as soon as possible.
2-32