2006 PONTIAC GRAND PRIX Owners Manual

Starting the Engine
Move your shift lever to PARK (P) or NEUTRAL (N).
The engine will not start in any other position — that is
a safety feature. To restart when you are already
moving, use NEUTRAL (N) only.
Notice:Shifting into PARK (P) with the vehicle
moving could damage the transaxle. Shift into
PARK (P) only when your vehicle is stopped.
1. With your foot off the accelerator pedal, turn the
ignition key to START. When the engine starts,
let go of the key. The idle speed will go down as the
engine gets warm.
Notice:Holding your key in START for longer than
15 seconds at a time will cause your battery to
be drained much sooner. And the excessive heat
can damage your starter motor. Wait about
15 seconds between each try to help avoid draining
your battery or damaging your starter.
2. If the engine does not start within 10 seconds, hold
your key in START for about 10 seconds at a time
until the engine starts. Wait about 15 seconds
between each try.When your engine has run for about 10 seconds to
warm up, your vehicle is ready to be driven. Do
not race your engine when it is cold.
If the weather is below freezing (32°F or 0°C), let
the engine run for a few minutes to warm up.
3. If your engine still will not start, or starts but then
stops, it could be ooded with too much gasoline.
Try pushing your accelerator pedal all the way to the
oor and holding it there as you hold the key in
START for about three seconds. If the vehicle starts
briey but then stops again, do the same
thing. This time keep the pedal down for ve or
six seconds to clear the extra gasoline from
the engine. After waiting about 15 seconds, repeat
the normal starting procedure.
Notice:Your engine is designed to work with the
electronics in your vehicle. If you add electrical
parts or accessories, you could change the way the
engine operates. Before adding electrical equipment,
check with your dealer. If you do not, your engine
might not perform properly. Any resulting damage
would not be covered by your vehicle’s warranty.
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Engine Coolant Heater
The vehicle may be equipped with an engine coolant
heater. In very cold weather, 0°F (−18°C) or colder, the
engine coolant heater can help. The vehicle will start
easier and get better fuel economy during engine
warm-up. Usually, the coolant heater should be plugged
in a minimum of four hours prior to starting the
vehicle. At temperatures above 32°F (0°C), use of the
coolant heater is not required. Your vehicle may
also have an internal thermostat in the plug end of the
cord. This will prevent operation of the engine coolant
heater when the temperature is at or above 0°F (−18°C)
as noted on the cord.
To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord. The
cord is located above the engine air cleaner/lter.
SeeEngine Compartment Overview on page 5-12
for more information on location.
3. Plug the cord into a normal, grounded 110-volt
AC outlet.
{CAUTION:
Plugging the cord into an ungrounded outlet
could cause an electrical shock. Also, the
wrong kind of extension cord could overheat
and cause a re. You could be seriously
injured. Plug the cord into a properly grounded
three-prong 110-volt AC outlet. If the cord will
not reach, use a heavy-duty three-prong
extension cord rated for at least 15 amps.
4. Before starting the engine, be sure to unplug and
store the cord as it was before, making sure to
keep it away from moving engine parts. If this is not
done, the cord could be damaged.
How long should the coolant heater be kept plugged in?
The answer depends on the outside temperature, the
kind of oil that is in the vehicle, and some other things.
Instead of trying to list everything here, we ask that
you contact your dealer in the area where the vehicle will
be parked. The dealer can give you the best advice
for that particular area.
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Displacement on Demand™ (DoD™)
(5.3L Engine)
Your vehicle’s engine may be equipped with
Displacement on Demand™ (DoD™). This system
allows the engine to operate on either all or half of its
cylinders, depending on your driving conditions.
When less power is required, such as cruising at a
constant vehicle speed, the system will operate in the
half cylinder mode, allowing your vehicle to achieve
better fuel economy. When greater power demands are
required, such as accelerating from a stop, passing,
or merging onto a freeway, the system will maintain
full-cylinder operation.
When greater power demands are required, such as
accelerating from a stop, passing, or merging onto
a freeway, the system will maintain eight-cylinder
operation. When less power is required, such a
cruising at a constant vehicle speed, the system will
automatically enable the four-cylinder mode, allowing
your vehicle to achieve better fuel economy.
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.
3800 V6 Engine
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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. 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 Your
Vehicle is 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.
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{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)
while the engine is running at high speed may
damage the transaxle. The repairs would not be
covered by your warranty. Be sure the engine is not
running at high speeds 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.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.).
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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),
can cause damage to your engine and/or transaxle.
Also, shifting into SECOND (2) at speeds above
65 mph (105 km/h) can cause damage. Drive
in 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, or parking brake to hold the
vehicle in place.Performance Shifting with TAP-Shift®
If the vehicle is equipped with the 3800 V6
Supercharged engine or the 5.3L V8 engine, your
vehicle may have this feature. It allows you to change
gears similar to a manual transaxle.
To fully use this feature, do the following:
1. The MANUAL (M) position can be selected while
the vehicle is moving. The current transaxle
position will continue to be displayed on the
Driver Information Center (DIC) and Head-Up
Display (HUD), if equipped.
2. Move the shift lever to
the MANUAL (M).
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3. The paddles are
located on the steering
wheel. They are
used to up-shift or
down-shift the
transaxle.
4. Push either paddle once to up-shift to the next
gear. Pull either paddle once to down-shift to
the next gear.
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 (2),
rather than FIRST (1). This will only occur if you
have “tapped up” to second gear.
The up-shift light on the
instrument panel cluster, or
the up-shift symbol on
the HUD, if equipped, is
given as a prompt to
use the TAP-Shift
®paddle.
For more information, seeUp-Shift Light on page 3-42.The up-shift 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.
The gear position will display on the DIC and HUD, if
equipped, when in manual mode.
Pressing the accelerator while driving in the highest
gear (FOURTH (4)) between 20 mph (32 km/h)
and 50 mph (80 km/h), will make the transaxle
automatically downshift. As your speed gets closer to
50 mph (80 km/h), you will need to increase accelerator
pedal travel to get the vehicle to downshift. At 50 mph
(80 km/h), even with the accelerator fully depressed, the
transaxle will always remain in FOURTH (4). The
transaxle will also automatically downshift as the vehicle
decelerates and comes to a stop.
If a paddle is pushed or pulled and the vehicle cannot
respond to a transaxle gear change, a chime will sound.
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.
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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. SeeDIC Warnings and Messages on
page 3-72for more information.
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, see
Towing a Trailer on page 4-40. That section shows
what to do rst to keep the trailer from moving.
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