2004 BUICK REGAL engine

Engine Coolant Heater
The vehicle may have this feature. 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 your vehicle. At temperatures
above 32°F (0°C), use of the coolant heater is not
required.
To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord. The
cord is attached to the underside of the vehicle’s
diagonal brace, which is located above the engine
air cleaner/lter assembly.
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. Unplug and store the cord as it was before to keep
it away from moving engine parts, before starting
the engine. If this is not done, the cord could
be damaged.
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How long should the coolant heater be kept plugged in?
The answer depends on the outside temperature, the
kind of oil used in the vehicle, and some other
things. Instead of trying to list everything here, contact
your dealer in the area where the vehicle will be parking.
The dealer can give you the best advice for that
particular area.
Automatic Transaxle Operation
The shift lever, located on
the console between the
seats, operates the
automatic transaxle.The ignition positions are displayed on the instrument
panel cluster and will indicate the gear the vehicle is in.
Maximum engine speed is limited on the automatic
transaxle when the vehicle is in PARK (P) or
NEUTRAL (N) to protect driveline components from
improper operation.
2-21

{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 4-39.
The positions for the shift lever are:
PARK (P): This position locks the vehicle’s front
wheels. It is the best position to use when the engine is
started because the vehicle cannot move easily.Make sure the shift lever is fully in PARK (P) before
starting the engine. The vehicle has an automatic
transaxle shift lock control system. You must fully apply
the regular brakes before shifting from PARK (P)
when the ignition is in RUN. If you cannot shift 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). SeeShifting
Out of Park (P) on page 2-27
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.
REVERSE (R): Use this gear to back up.
To rock the vehicle back and forth in order to get it out
of snow, ice or sand without damaging the transaxle,
seeIf You Are Stuck: In Sand, Mud, Ice or Snow
on page 4-30.
2-22

NEUTRAL (N):In this position, the engine does not
connect with the wheels. To restart when you are
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.
Notice:Driving your vehicle if you notice that it is
moving slowly or not shifting gears as you
increase speed may 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.AUTOMATIC OVERDRIVE (
X): This position is for
normal driving. If more power is needed for passing, and
the vehicle 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.
By doing this the vehicle will automatically shift down to
the next gear and have more power.
THIRD (3):This position is also used for normal driving,
but it offers more power and lower fuel economy than
AUTOMATIC OVERDRIVE (
X).
Here are some times you might choose THIRD (3)
instead of AUTOMATIC OVERDRIVE (
X):
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 no-highway scenarios such as city
streets.
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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 you are towing a trailer and parking on any hill, see
Towing a Trailer on page 4-39. That section shows what
to do rst to keep the trailer from moving.
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 4-39.
1. Hold the brake pedal down with your right foot and
set the parking brake with your left foot.2. Move the shift lever
into PARK (P) by
pressing the shift lock
button at the top of
the lever while pushing
the shift lever all the
way toward the front of
the vehicle.
3. Turn the ignition key to LOCK.
4. Remove the key and take it with you. If you can
leave the vehicle with the ignition key in your
hand, the vehicle is in PARK (P).
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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 the
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 out of PARK (P) without rst pushing
the shift lever button. If you can, it means that the shift
lever was not fully locked into PARK (P).
Torque Lock
If the vehicle is parked on a hill and the transaxle is not
shifted into PARK (P) properly, the weight of the
vehicle may put too much force on the parking pawl in
the transaxle. It might be 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 leaving the driver’s
seat. To nd out how, seeShifting Into Park (P) on
page 2-25.
When you are ready to drive, move the shift lever out of
PARK (P)beforeyou release the parking brake.
If torque lock does occur, another vehicle might have to
push yours a little uphill. This takes some of the
pressure off the parking pawl in the transaxle, enabling
the shift lever to be moved out of PARK (P).
2-26

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 the OFF position. The regular brakes must
be fully applied before the vehicle can be shifted from
PARK (P) when the ignition in RUN. SeeAutomatic
Transaxle Operation on page 2-21.
If the vehicle cannot be shifted out of PARK (P), ease
pressure on the shift lever and push the shift lever all the
way into PARK (P) as brake application is maintained.
Then, move the shift lever into the desired gear.
If the brake pedal is pressed down but the vehicle still
cannot be shifted out of PARK (P), try this:
1. Turn the ignition key to ACCESSORY. 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 engine and then shift to the desired gear.
5. Have the system xed as soon as possible.
Shift Lock Release
The vehicle is equipped with a shift lock release system.
It is designed to prevent ignition key removal unless
the shift lever is in PARK (P) and the shift lever button
is fully released.
It also prevents the shift lever from moving out of
PARK (P) when the ignition is in OFF or in LOCK. The
shift lock release system will not operate in the case
of a dead or low voltage (less than 9 V) battery.
If the vehicle has a dead battery or a battery with low
voltage, there are two override access slots that
will allow you to override the shift lock release system.
The rst access slot is located underneath the
steering column below the lock cylinder. To use this
slot, do the following:
1. Verify that the shift lever is in PARK (P) with the
shift lever button released.
2. Remove the override access slot cap to show the
override mechanism release button.
3. Insert a key or tool into the access slot and then
press and hold the override mechanism release
button.
4. Turn the ignition key to OFF.
5. Remove the key from the ignition switch.
6. Put the override access slot cap back on.
2-27

Engine Exhaust
{CAUTION:
Engine exhaust can kill. It contains the gas
carbon monoxide (CO), which you can not see
or smell. It can cause unconsciousness and
death.
You might have exhaust coming in if:
Your exhaust system sounds strange or
different.
Your vehicle gets rusty underneath.
Your vehicle was damaged in a collision.
CAUTION: (Continued)
CAUTION: (Continued)

Your vehicle was damaged when driving
over high points on the road or over road
debris.
Repairs were not done correctly.
Your vehicle or exhaust system had been
modied improperly.
If you ever suspect exhaust is coming into
your vehicle:
Drive it only with all the windows down to
blow out any CO; and
Have your vehicle xed immediately.
2-29