2005 PONTIAC GRAND PRIX engine

Ignition Positions
The ignition switch is located on the instrument panel,
to the right of the steering column.
There are four different
positions. Insert the key
in the ignition and turn
it to the right for each
position.
9(OFF):This position locks the ignition, steering
wheel and transaxle. It is a theft-deterrent feature. This is
the only position from which the key can be removed.
Notice:Using a tool to force the key from the
ignition switch could cause damage or break the
key. Use the correct key and turn the key only with
your hand. Make sure the key is all the way in. If
it is, turn the steering wheel left and right while you
turn the key hard. If none of this works, then
your vehicle needs service.ACC (ACCESSORY):This position allows things like
the radio and windshield wipers to operate while
the engine is off.
R(RUN):This position is where the key returns to
after the vehicle is started. With the engine off, the
RUN position displays some of the warning and
indicator lights.
/(START):This position starts the engine. Let go of
the key when the engine starts. The key will return
to the RUN position for normal driving.
A continuous warning chime will sound and a KEY IN
IGNITION warning message will display on the
Driver Information Center (DIC) if the key is in the
ignition in OFF or ACC and the driver’s door is opened.
Retained Accessory Power (RAP)
If the vehicle has Retained Accessory Power (RAP),
certain features will continue to operate for up to
10 minutes after the ignition key is turned to OFF unless
a door is opened.
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Starting Your 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.
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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 it 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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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.
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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.
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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

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).
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