Page 132 of 450

Black plate (28,1)Buick Lucerne Owner Manual - 2011
4. Turn the ignition key to LOCK/OFF.
5. Remove the key and take it with you. If you canleave the vehicle with the ignition key in your hand,
the vehicle is in P (Park).
Leaving the Vehicle With the Engine
Running
{WARNING:
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 firmly set. And, if you leave the
vehicle with the engine running, it could overheat
and even catch fire. 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 your vehicle is in P (Park) and the parking
brake is firmly set before you leave it. See Parking
Brake
on page 3‑26for more information.
Torque Lock
Torque lock is when the weight of the vehicle puts too
much force on the parking pawl in the transmission.
This happens when parking on a hill and shifting the
transmission into P (Park) is not done properly and then
it is difficult to shift out of P (Park). To prevent torque
lock, set the parking brake and then shift into P (Park).
To find out how, see “Shifting Into Park”in this section.
If torque lock does occur, your vehicle may need to be
pushed uphill by another vehicle to relieve the parking
pawl pressure, so you can shift out of P (Park).
Shifting Out of Park
Automatic Transmission Shift Lock
This vehicle has an electronic shift lock release system.
The shift lock release is designed to:
.Prevent ignition key removal unless the shift lever
is in P (Park)
.Prevent movement of the shift lever out of P (Park),
unless the ignition is in ON/RUN and the regular
brake pedal is applied.
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Page 327 of 450

Black plate (41,1)Buick Lucerne Owner Manual - 2011
Brake Wear
This vehicle has disc brakes. Disc brake pads have
built-in wear indicators that make a high-pitched
warning sound when the brake pads are worn and new
pads are needed. The sound can come and go or be
heard all the time the vehicle is moving, except when
applying the brake pedal firmly.
{WARNING:
The brake wear warning sound means that soon
the brakes will not work well. That could lead to
a crash. When the brake wear warning sound is
heard, have the vehicle serviced.Notice:
Continuing to drive with worn-out brake
pads could result in costly brake repair.
Some driving conditions or climates can cause a brake
squeal when the brakes are first applied or lightly
applied. This does not mean something is wrong with
the brakes.
Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated,
inspect brake pads for wear and evenly tighten wheel
nuts in the proper sequence to torque specifications in
Capacities and Specifications on page 6‑116.
Brake linings should always be replaced as complete
axle sets.
Brake Pedal Travel
See your dealer if the brake pedal does not return to
normal height, or if there is a rapid increase in pedal
travel. This could be a sign that brake service might be
required.
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Page 357 of 450

Black plate (71,1)Buick Lucerne Owner Manual - 2011
After the tires have been rotated, adjust the front
and rear inflation pressures as shown on the Tire
and Loading Information label. SeeInflation - Tire
Pressure
on page 6‑64and Loading the Vehicleon
page 5‑18
.
Reset the Tire Pressure Monitor System. See Tire
Pressure Monitor Operation
on page 6‑66.
Make certain that all wheel nuts are properly
tightened. See “Wheel Nut Torque” under
Capacities and Specifications
on page 6‑116.
{WARNING:
Rust or dirt on a wheel, or on the parts to
which it is fastened, can make wheel nuts
become loose after time. The wheel could
come off and cause an accident. When you
change a wheel, remove any rust or dirt from
places where the wheel attaches to the
vehicle. In an emergency, you can use a
cloth or a paper towel to do this; but be
sure to use a scraper or wire brush later,
if needed, to get all the rust or dirt off. See
Changing a Flat Tire
on page 6‑88. Lightly coat the center of the wheel hub with
wheel bearing grease after a wheel change or tire
rotation to prevent corrosion or rust build-up. Do
not get grease on the flat wheel mounting surface
or on the wheel nuts or bolts.
When It Is Time for New Tires
Various factors, such as maintenance, temperatures,
driving speeds, vehicle loading, and road conditions
influence when you need new tires.
One way to tell when it is
time for new tires is to
check the treadwear
indicators, which will
appear when your tires
have only 1/16 inch
(1.6 mm) or less of tread
remaining. See
Tire
Inspection and Rotation
on page 6‑70for
additional information.
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Page 381 of 450
Black plate (95,1)Buick Lucerne Owner Manual - 2011
{WARNING:
Wheel nuts that are improperly or incorrectly
tightened can cause the wheels to become
loose or come off. The wheel nuts should be
tightened with a torque wrench to the proper
torque specification after replacing. Follow the
torque specification supplied by the aftermarket
manufacturer when using accessory locking wheel
nuts. SeeCapacities and Specifications
on
page 6‑116
for original equipment wheel nut
torque specifications.
Notice: Improperly tightened wheel nuts can lead
to brake pulsation and rotor damage. To avoid
expensive brake repairs, evenly tighten the
wheel nuts in the proper sequence and to the
proper torque specification. See Capacities and
Specifications
on page 6‑116for the wheel nut
torque specification.
13. Tighten the wheel nuts
firmly in a crisscross
sequence as shown.
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Page 402 of 450
Black plate (116,1)Buick Lucerne Owner Manual - 2011
Capacities and Specifications
The following approximate capacities are given in English and metric conversions. SeeRecommended Fluids and
Lubricantson page 7‑8for more information.
Application Capacities
English Metric
Air Conditioning Refrigerant R134a For the air conditioning system refrigerant charge
amount, see the refrigerant label located under the hood. See your dealer for more information.
Engine Cooling System 3.9L V6 Engine 9.7 qt9.2 L
4.6L V8 Engine 12.7 qt12.0 L
Engine Oil with Filter
3.9L V6 Engine 4.0 qt3.8 L
4.6L V8 Engine 7.4 qt7.0 L
Fuel Tank 18.5 gal70.0 L
Transmission Fluid - Bottom Pan Removal 3.9L V6 Engine 7.4 qt7.0 L
4.6L V8 Engine 7.4 qt7.0 L
Wheel Nut Torque 100 lb ft140Y
All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this manual.
Recheck fluid level after filling.
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