
Black plate (23,1)Buick LaCrosse Owner Manual - 2012
Vehicle Care 10-23
Notice
.When using concentrated
washer fluid, follow the
manufacturer's instructions
for adding water.
.Do not mix water with
ready-to-use washer fluid.
Water can cause the solution
to freeze and damage the
washer fluid tank and other
parts of the washer system.
Also, water does not clean as
well as washer fluid.
.Fill the washer fluid tank only
three-quarters full when it is
very cold. This allows for
fluid expansion if freezing
occurs, which could damage
the tank if it is
completely full.
.Do not use engine coolant
(antifreeze) in the windshield
washer. It can damage the
windshield washer system
and paint.
Brakes
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 12‑2.
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. 

Black plate (103,1)Buick LaCrosse Owner Manual - 2012
Vehicle Care 10-103
Protecting Exterior Bright Metal
Parts
Regularly clean bright metal parts
with water or chrome polish on
chrome or stainless steel trim,
if necessary.
For aluminum, never use auto or
chrome polish, steam, or caustic
soap to clean. A coating of wax,
rubbed to a high polish, is
recommended for all bright metal
parts.
Cleaning Exterior Lamps/
Lenses and Emblems
Use only lukewarm or cold water, a
soft cloth, and a car washing soap
to clean exterior lamps and lenses.
Follow instructions under "Washing
the Vehicle" later in this section.
Windshield and Wiper Blades
Clean the outside of the windshield
with glass cleaner.
Clean rubber blades using a lint-free
cloth or paper towel soaked with
windshield washer fluid or a mild
detergent. Wash the windshield
thoroughly when cleaning the
blades. Bugs, road grime, sap, and
a buildup of vehicle wash/wax
treatments may cause wiper
streaking.
Replace the wiper blades if they are
worn or damaged. Damage can be
caused by extreme dusty
conditions, sand, salt, heat, sun,
snow, and ice.
Weatherstrips
Apply silicone grease on
weatherstrips to make them last
longer, seal better, and not stick or
squeak. SeeRecommended Fluids
and Lubricants on page 11‑12.
Tires
Use a stiff brush with tire cleaner to
clean the tires.
Notice: Using petroleum-based
tire dressing products on the
vehicle may damage the paint
finish and/or tires. When applying
a tire dressing, always wipe off
any overspray from all painted
surfaces on the vehicle.
Wheels and Trim —Aluminum
or Chrome
Use a soft, clean cloth with mild
soap and water to clean the wheels.
After rinsing thoroughly with clean
water, dry with a soft, clean towel.
A wax may then be applied. 

Black plate (3,1)Buick LaCrosse Owner Manual - 2012
Service and Maintenance 11-3
Maintenance
Schedule
Owner Checks and Services
At Each Fuel Stop
.Check the engine oil level. See
Engine Oil on page 10‑9.
Once a Month
.Check the tire inflation
pressures. See Tire Pressure on
page 10‑54.
.Inspect the tires for wear. See
Tire Inspection on page 10‑60.
.Check the windshield washer
fluid level. See Washer Fluid on
page 10‑22.
Engine Oil Change
When the CHANGE ENGINE OIL
SOON message displays, have the
engine oil and filter changed within
the next 1 000 km/600 mi. If driven
under the best conditions, the
engine oil life system might not
indicate the need for vehicle service
for more than a year. The engine oil
and filter must be changed at least
once a year and the oil life system
must be reset. Your trained dealer
technician can perform this work.
If the engine oil life system is reset
accidentally, service the vehicle
within 5 000 km/3,000 mi since the
last service. Reset the oil life
system when the oil is changed.
See Engine Oil Life System on
page 10‑12.
Tire Rotation and Required
Services Every 12 000 km/
7,500 mi
Rotate the tires, if recommended for
the vehicle, and perform the
following services. See Tire
Rotation on page 10‑61.
.Check engine oil level and oil
life percentage. If needed,
change engine oil and filter, and
reset oil life system. See Engine
Oil on page 10‑9 andEngine Oil
Life System on page 10‑12.
.Check engine coolant level. See
Engine Coolant on page 10‑16.
.Check windshield washer fluid
level. See Washer Fluid on
page 10‑22.
.Visually inspect windshield wiper
blades for wear, cracking,
or contamination. See Exterior
Care on page 10‑102. Replace
worn or damaged wiper blades.
See Wiper Blade Replacement
on page 10‑29. 

Black plate (10,1)Buick LaCrosse Owner Manual - 2012
11-10 Service and Maintenance
Fluids
Proper fluid levels and approved
fluids protect the vehicle’s systems
and components. See
Recommended Fluids and
Lubricants on page 11‑12for GM
approved fluids.
.Engine oil and windshield
washer fluid levels should be
checked at every fuel fill.
.Instrument cluster lights may
come on to indicate that fluids
may be low and need to be
filled.
Hoses
Hoses transport fluids and should
be regularly inspected to ensure
that there are no cracks or leaks.
With a multi‐point inspection, your
dealer can inspect the hoses and
advise if replacement is needed. Lamps
Properly working headlamps,
taillamps, and brake lamps are
important to see and be seen on
the road.
.Signs that the headlamps need
attention include dimming, failure
to light, cracking, or damage.
The brake lamps need to be
checked periodically to ensure
that they light when braking.
.With a multi‐point inspection,
your dealer can check the lamps
and note any concerns.
Shocks and Struts
Shocks and struts help aid in control
for a smoother ride.
.Signs of wear may include
steering wheel vibration, bounce/
sway while braking, longer
stopping distance, or uneven
tire wear.
.As part of the multi‐point
inspection, trained dealer
technicians can visually inspect
the shocks and struts for signs
of leaking, blown seals,
or damage, and can advise
when service is needed. 

Black plate (12,1)Buick LaCrosse Owner Manual - 2012
11-12 Service and Maintenance
Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
UsageFluid/Lubricant
Engine Oil Use only engine oil licensed to the dexos1 specfication, or equivalent, of
the proper SAE viscosity grade. ACDelco dexos1 Synthetic Blend is
recommended. See
Engine Oil on page 10‑9.
Engine Coolant (3.6L V6 Engine) 50/50 mixture of clean, drinkable water and use only DEX-COOL Coolant.
See
Engine Coolant on page 10‑16.
Engine Coolant (2.4L L4 Engine) Always use the pre‐mixed 50/50 mixture of deionized water and
DEX-COOL Coolant available at your dealer.
Hydraulic Brake System DOT 3 Hydraulic Brake Fluid (GM Part No. 88862806, in
Canada 88862807).
Windshield Washer Optikleen
®Washer Solvent.
Hydraulic Power Steering System DEXRON
®-VI Automatic Transmission Fluid.
Automatic Transmission DEXRON
®-VI Automatic Transmission Fluid. 

Black plate (5,1)Buick LaCrosse Owner Manual - 2012
INDEX i-5
Engine (cont'd)Overheated Protection
Operating Mode . . . . . . . . . . . 10-21
Overheating . . . . . . . . . . . . . . . . 10-19
Power Messages . . . . . . . . . . . . . 5-38
Pressure Light . . . . . . . . . . . . . . . . 5-25
Running While Parked . . . . . . . . 9-30
Starting . . . . . . . . . . . . . . . . . . . . . . . 9-22
Entry Lighting . . . . . . . . . . . . . . . . . . . 6-7
Equipment, Towing . . . . . . . . . . . . 9-62
Event Data Recorders . . . . . . . . 13-20
Exit Lighting . . . . . . . . . . . . . . . . . . . . 6-7
Extender, Safety Belt . . . . . . . . . . 3-20
Exterior Lamp Controls . . . . . . . . . 6-1
Exterior Lamps Off Reminder . . . 6-2
F
Features
Memory . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Filter,
Engine Air Cleaner . . . . . . . . . 10-13
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 6-2
Flashers, Hazard Warning . . . . . . 6-4 Flat Tire . . . . . . . . . . . . . . . . . . . . . . 10-69
Changing . . . . . . . . . . . . . . . . . . . 10-87
Floor Mats . . . . . . . . . . . . . . . . . . .10-107
Fluid Automatic Transmission . . . . 10-13
Brakes . . . . . . . . . . . . . . . . . . . . . . 10-24
Power Steering . . . . . . . . . . . . . 10-21
Washer . . . . . . . . . . . . . . . . . . . . . 10-22
Fog Lamps Bulb Replacement . . . . . . . . . . . . . 6-5
Folding Mirrors . . . . . . . . . . . . . . . . 2-17
Front Fog Lamp
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26
Front Seats Adjustment . . . . . . . . . . . . . . . . . . . . 3-4
Heated and Ventilated . . . . . . . . 3-10
Front Storage . . . . . . . . . . . . . . . . . . . 4-1
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-52 Additives . . . . . . . . . . . . . . . . . . . . . 9-53
Economy Driving . . . . . . . . . . . . . 1-27
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . 9-56 Fuel (cont'd)
Filling the Tank . . . . . . . . . . . . . . . 9-55
Foreign Countries . . . . . . . . . . . . 9-53
Gasoline Specifications . . . . . . . 9-53
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 5-12
Low Fuel Warning Light . . . . . . . 5-25
Recommended . . . . . . . . . . . . . . . 9-53
Requirements, California . . . . . 9-53
System Messages . . . . . . . . . . . . 5-39
Fuses Engine CompartmentFuse Block . . . . . . . . . . . . . . . . 10-38
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . 10-38
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . 10-42
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . 10-44
G
Garage Door Opener . . . . . . . . . . 5-49
Programming . . . . . . . . . . . . . . . . . 5-49
Gasoline Specifications . . . . . . . . . . . . . . . . . 9-53 

Black plate (14,1)Buick LaCrosse Owner Manual - 2012
i-14 INDEX
Vehicle CareStoring the Tire Sealant
and Compressor Kit . . . . . . . 10-87
Tire Pressure . . . . . . . . . . . . . . . 10-54
Ventilation, Air . . . . . . . . . . . . . . . . . 8-10
Visors . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Voltage Devices and Wiring . . . . . . . . . . . . . . . . . . . . . . . 10-37
W
WarningBrake System Light . . . . . . . . . . . 5-20
Warning Lights, Gauges, and
Indicators . . . . . . . . . . . . . . . . . . . . . 5-9
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . iv Cautions and Danger . . . . . . . . . . . .iv
Hazard Flashers . . . . . . . . . . . . . . . 6-4
Washer Fluid . . . . . . . . . . . . . . . . . 10-22 Wheels
Alignment and Tire
Balance . . . . . . . . . . . . . . . . . . . 10-67
Different Size . . . . . . . . . . . . . . . 10-65
Replacement . . . . . . . . . . . . . . . 10-67
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 10-62
Where to Put the Restraint . . . . 3-43
Windows . . . . . . . . . . . . . . . . . . . . . . 2-19 Messages . . . . . . . . . . . . . . . . . . . . 5-42
Power . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Windshield Wiper/Washer . . . . . . . . . . . . . . . . . 5-3
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . . 9-9
Winter Tires . . . . . . . . . . . . . . . . . . 10-48
Wiper Blade Replacement . . . . 10-29
Wiring, High Voltage
Devices . . . . . . . . . . . . . . . . . . . . . 10-37