running light BUICK LACROSSE 2015 User Guide

Black plate (33,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
Driving and Operating 9-33
Caution (Continued)
damage to brake system parts.
Make sure that the parking brake
is fully released and the brake
warning light is off before driving.
Automatic EPB Release
The EPB will automatically release if
the vehicle is running, placed into
gear, and an attempt is made to
drive away. Avoid rapid acceleration
when the EPB is applied, to
preserve parking brake lining life.
If parking on a hill, or if the vehicle
is pulling a trailer, seeDriving
Characteristics and Towing Tips on
page 9-63.
Brake Assist
The Brake Assist feature is
designed to assist the driver in
stopping or decreasing vehicle
speed in emergency driving
conditions. This feature uses the
stability system hydraulic brake
control module to supplement the
power brake system under
conditions where the driver has
quickly and forcefully applied the
brake pedal in an attempt to quickly
stop or slow down the vehicle. The
stability system hydraulic brake
control module increases brake
pressure at each corner of the
vehicle until the ABS activates.
Minor brake pedal pulsation or
pedal movement during this time is
normal and the driver should
continue to apply the brake pedal as
the driving situation dictates. The
Brake Assist feature will
automatically disengage when the
brake pedal is released or brake
pedal pressure is quickly
decreased.
Hill Start Assist (HSA)
This vehicle has an HSA feature,
which may be useful when the
vehicle is stopped on a grade
sufficient enough to activate HSA.
This feature is designed to prevent
the vehicle from rolling, either
forward or rearward, during vehicle
drive off. After the driver completely
stops and holds the vehicle in a
complete standstill on a grade, HSA
will be automatically activated.
During the transition period between
when the driver releases the brake
pedal and starts to accelerate to
drive off on a grade, HSA holds the
braking pressure for a maximum of
two seconds to ensure that there is
no rolling. The brakes will
automatically release when the
accelerator pedal is applied within
the two-second window. It will not
activate if the vehicle is in a drive
gear and facing downhill, or if the
vehicle is facing uphill and in
R (Reverse).

Black plate (22,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
10-22 Vehicle Care
If the decision is made not to lift the
hood when this warning appears,
get service help right away. See
Roadside Assistance Program on
page 13-5.
If the decision is made to lift the
hood, make sure the vehicle is
parked on a level surface.
Then check to see if the engine
cooling fans are running. If the
engine is overheating, the fans
should be running. If not, do not
continue to run the engine and have
the vehicle serviced.
{Caution
Running the engine without
coolant may cause damage or a
fire. Vehicle damage would not be
covered by the vehicle warranty.
If Steam Is Coming from the
Engine Compartment
SeeOverheated Engine Protection
Operating Mode on page 10-23 for
information on driving to a safe
place in an emergency.
If No Steam Is Coming from
the Engine Compartment
If an engine overheat warning is
displayed but no steam can be seen
or heard, the problem might not be
too serious. Sometimes the engine
can get a little too hot when the
vehicle:
.Climbs a long hill on a hot day.
.Stops after high-speed driving.
.Idles for long periods in traffic.
.Tows a trailer. If the overheat warning displays with
no sign of steam:
1. Turn the air conditioning off.
2. Turn the heater on to the highest
temperature and to the highest
fan speed. Open the windows as
necessary.
3. When it is safe to do so, pull off the road, shift to P (Park) or
N (Neutral), and let the
engine idle.
If the temperature overheat gauge is
no longer in the overheat zone or an
engine coolant temperature warning
light no longer displays, the vehicle
can be driven. Continue to drive the
vehicle slowly for about 10 minutes.
Keep a safe vehicle distance from
the vehicle in front. If the warning
does not come back on, continue to
drive normally and have the cooling
system checked for proper fill and
function.

Black plate (67,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
Vehicle Care 10-67
Using the Tire Sealant and
Compressor Kit to Temporarily
Seal and Inflate a
Punctured Tire
Follow the directions closely for
correct sealant usage.
When using the tire sealant and
compressor kit during cold
temperatures, warm the kit in a
heated environment for five minutes.
This will help to inflate the tire
faster.If a tire goes flat, avoid further tire
and wheel damage by driving slowly
to a level place. Turn on the hazard
warning flashers. See
Hazard
Warning Flashers on page 6-4.
See If a Tire Goes Flat on
page 10-63 for other important
safety warnings.
Do not remove any objects that
have penetrated the tire.
1. Remove the tire sealant and compressor kit from its storage
location. See Storing the Tire
Sealant and Compressor Kit on
page 10-72.
2. Unwrap the sealant/air hose (6) and the power plug (7).
3. Place the kit on the ground. Make sure the tire valve stem is
positioned close to the ground
so the hose will reach it.
4. Remove the valve stem cap from the flat tire by turning it
counterclockwise. 5. Attach the sealant/air hose (6)
onto the tire valve stem. Turn it
clockwise until it is tight.
6. Plug the power plug (7) into the accessory power outlet in the
vehicle. Unplug all items from
other accessory power outlets.
If the vehicle has an accessory
power outlet, do not use the
cigarette lighter.
If the vehicle only has a cigarette
lighter, use the cigarette lighter.
Do not pinch the power plug
cord in the door or window.
7. Start the vehicle. The vehicle must be running while using the
air compressor.
8. Turn the selector switch (2) clockwise to the Sealant + Air
position.

Black plate (70,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
10-70 Vehicle Care
Using the Tire Sealant and
Compressor Kit without
Sealant to Inflate a Tire (Not
Punctured)
To use the air compressor to inflate
a tire with air only and not sealant:
If a tire goes flat, avoid further tire
and wheel damage by driving slowly
to a level place. Turn on the hazard
warning flashers. SeeHazard
Warning Flashers on page 6-4. See
If a Tire Goes Flat on
page 10-63 for other important
safety warnings.
1. Remove the tire sealant and compressor kit from its storage
location. See Storing the Tire
Sealant and Compressor Kit on
page 10-72.
2. Unwrap the air only hose (5) and the power plug (7).
3. Place the kit on the ground. Make sure the tire valve stem is
positioned close to the ground
so the hose will reach it.
4. Remove the tire valve stem cap from the flat tire by turning it
counterclockwise.
5. Attach the air only hose (5) onto the tire valve stem by turning it
clockwise until it is tight. 6. Plug the power plug (7) into the
accessory power outlet in the
vehicle. Unplug all items from
other accessory power outlets.
If the vehicle has an accessory
power outlet, do not use the
cigarette lighter.
If the vehicle only has a cigarette
lighter, use the cigarette lighter.
Do not pinch the power plug
cord in the door or window.
7. Start the vehicle. The vehicle must be running while using the
air compressor.
8. Turn the selector switch (2) counterclockwise to the Air Only
position.
9. Press the on/off button (1) to turn the compressor on.
The compressor will inflate the
tire with air only.

Black plate (81,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
Vehicle Care 10-81
mounting bolt. Connect to a spot as
far away from the discharged
battery as possible.
1. Check the other vehicle. It musthave a 12-volt battery with a
negative ground system.
{Caution
If the other vehicle does not have
a 12-volt system with a negative
ground, both vehicles can be
damaged. Only use a vehicle that
has a 12-volt system with a
negative ground for jump starting.
2. Position the two vehicles so that they are not touching.
3. Set the parking brake firmly and put the shift lever in P (Park).
See Shifting Into Park on
page 9-24.
{Caution
If any accessories are left on or
plugged in during the jump
starting procedure, they could be
damaged. The repairs would not
be covered by the vehicle
warranty. Whenever possible, turn
off or unplug all accessories on
either vehicle when jump starting.
4. Turn the ignition to LOCK/OFF and switch off all lights and
accessories in both vehicles,
except the hazard warning
flashers if needed.
{Warning
An electric fan can start up even
when the engine is not running
and can injure you. Keep hands,
clothing and tools away from any
underhood electric fan.
{Warning
Using a match near a battery can
cause battery gas to explode.
People have been hurt doing this,
and some have been blinded.
Use a flashlight if you need more
light.
Battery fluid contains acid that
can burn you. Do not get it on
you. If you accidentally get it in
your eyes or on your skin, flush
the place with water and get
medical help immediately.
{Warning
Fans or other moving engine
parts can injure you badly. Keep
your hands away from moving
parts once the engine is running.

Black plate (3,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
INDEX i-3
Compact Spare Tire . . . . . . . . . . 10-77
CompartmentsStorage . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Compass . . . . . . . . . . . . . . . . . . . . . . . 5-4 Messages . . . . . . . . . . . . . . . . . . . . 5-36
Compressor Kit, Tire Sealant . . . . . . . . . . . . . . . . . . . . . . 10-65
Connections OnStar
®. . . . . . . . . . . . . . . . . . . . . . 14-4
Control Traction and Electronic
Stability . . . . . . . . . . . . . . . . . . . . . 9-34
Control of a Vehicle . . . . . . . . . . . . . 9-3
Convenience Net . . . . . . . . . . . . . . . 4-3
Convex Mirrors . . . . . . . . . . . . . . . . 2-18
Coolant Engine . . . . . . . . . . . . . . . . . . . . . . 10-19
Engine TemperatureGauge . . . . . . . . . . . . . . . . . . . . . . 5-13
Engine Temperature Warning Light . . . . . . . . . . . . . . . 5-22
Cooling System . . . . . . . . . . . . . . . 10-17 Engine Messages . . . . . . . . . . . . 5-38
Courtesy Transportation Program . . . . . . . . . . . . . . . . . . . . . . 13-7 Cruise Control . . . . . . . . . . . . . . . . . 9-37
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25
Messages . . . . . . . . . . . . . . . . . . . . 5-36
Cruise Control, Active . . . . . . . . . 9-39
Cupholders . . . . . . . . . . . . . . . . . . . . . 4-1
Customer Assistance . . . . . . . . . . 13-4 Offices . . . . . . . . . . . . . . . . . . . . . . . . 13-3
Text Telephone (TTY)
Users . . . . . . . . . . . . . . . . . . . . . . . 13-4
Customer Information Service Publications
Ordering Information . . . . . . .13-11
Customer Satisfaction Procedure . . . . . . . . . . . . . . . . . . . . 13-1
D
Damage Repair, Collision . . . . . . 13-8
Danger, Warnings, andCautions . . . . . . . . . . . . . . . . . . . . . . . . iv
Data Recorders, Event . . . . . . . 13-14
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . . . . 6-2
Defensive Driving . . . . . . . . . . . . . . . 9-3
Delayed Locking . . . . . . . . . . . . . . . 2-12
Differential, Limited-Slip . . . . . . . 9-36
Distracted Driving . . . . . . . . . . . . . . . 9-2 Dome Lamps . . . . . . . . . . . . . . . . . . . 6-5
Door
Ajar Light . . . . . . . . . . . . . . . . . . . . . 5-26
Ajar Messages . . . . . . . . . . . . . . . 5-37
Delayed Locking . . . . . . . . . . . . . . 2-12
Locks . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Power Locks . . . . . . . . . . . . . . . . . . 2-11
Drive Belt Routing, Engine . . . . . 12-4
Drive Systems All-Wheel Drive . . . . . . . 9-30, 10-28
Driver Assistance Systems . . . . 9-47
Driver Information
Center (DIC) . . . . . . . . . . . . . . . . . 5-28
Driving Assistance Systems . . . . . . . . . . 9-50
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . 9-63
Defensive . . . . . . . . . . . . . . . . . . . . . . 9-3
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
For Better Fuel Economy . . . . . 1-23
Hill and Mountain Roads . . . . . . . 9-7
If the Vehicle is Stuck . . . . . . . . . . 9-9
Loss of Control . . . . . . . . . . . . . . . . 9-6
Off-Road Recovery . . . . . . . . . . . . 9-5

Black plate (4,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
i-4 INDEX
Driving (cont'd)Vehicle Load Limits . . . . . . . . . . . 9-10
Wet Roads . . . . . . . . . . . . . . . . . . . . 9-6
Winter . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . 8-1
E
E85 or FlexFuel . . . . . . . . . . . . . . . 9-60
Electric Parking Brake Light . . . 5-20
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . 9-68
Electrical System Engine CompartmentFuse Block . . . . . . . . . . . . . . . . 10-36
Fuses and Circuit
Breakers . . . . . . . . . . . . . . . . . . 10-35
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . 10-40
Overload . . . . . . . . . . . . . . . . . . . 10-35
Emergency OnStar
®. . . . . . . . . . . . . . . . . . . . . . 14-2
Energy Information . . . . . . . . . . . . 5-27 Engine
Air Cleaner/Filter . . . . . . . . . . . 10-15
Check and Service Engine
Soon Light . . . . . . . . . . . . . . . . . . 5-16
Compartment Overview . . . . . . . 10-6
Coolant . . . . . . . . . . . . . . . . . . . . . 10-19
Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . 5-13
Coolant Temperature Warning Light . . . . . . . . . . . . . . . 5-22
Cooling System . . . . . . . . . . . . . 10-17
Cooling System Messages . . . 5-38
Drive Belt Routing . . . . . . . . . . . . 12-4
Exhaust . . . . . . . . . . . . . . . . . . . . . . 9-26
Heater . . . . . . . . . . . . . . . . . . . . . . . . 9-22
Oil Life System . . . . . . . . . . . . . 10-13
Oil Messages . . . . . . . . . . . . . . . . . 5-38
Overheated Protection
Operating Mode . . . . . . . . . . . 10-23
Overheating . . . . . . . . . . . . . . . . 10-21
Power Messages . . . . . . . . . . . . . 5-39
Pressure Light . . . . . . . . . . . . . . . . 5-23
Running While Parked . . . . . . . . 9-26
Starting . . . . . . . . . . . . . . . . . . . . . . . 9-18
Entry Lighting . . . . . . . . . . . . . . . . . . . 6-6
Equipment, Towing . . . . . . . . . . . . 9-67 Event Data Recorders . . . . . . . . 13-14
Exit Lighting . . . . . . . . . . . . . . . . . . . . 6-7
Extender, Safety Belt . . . . . . . . . . 3-19
Exterior Lamp Controls . . . . . . . . . 6-1
Exterior Lamps Off Reminder . . . 6-2
F
Features
Memory . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Filter, Engine Air Cleaner . . . . . . . . . 10-15
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 6-2
Flashers, Hazard Warning . . . . . . 6-4
Flat Tire . . . . . . . . . . . . . . . . . . . . . . 10-63 Changing . . . . . . . . . . . . . . . . . . . 10-72
FlexFuel E85 . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-60
Floor Mats . . . . . . . . . . . . . . . . . . . . 10-93
Fluid
Automatic Transmission . . . . 10-15
Brakes . . . . . . . . . . . . . . . . . . . . . . 10-26
Power Steering . . . . . . . . . . . . . 10-23
Washer . . . . . . . . . . . . . . . . . . . . . 10-24
Fog Lamps . . . . . . . . . . . . . . . . . . . . . 6-4
Folding Mirrors . . . . . . . . . . . . . . . . 2-19

Black plate (5,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
INDEX i-5
Forward Collision Alert(FCA) System . . . . . . . . . . . . . . . . 9-50
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . 13-12
Front Fog Lamp Light . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25
Front Seats
Adjustment . . . . . . . . . . . . . . . . . . . . 3-4
Heated and Ventilated . . . . . . . . . 3-9
Front Storage . . . . . . . . . . . . . . . . . . . 4-2
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-58 Additives . . . . . . . . . . . . . . . . . . . . . 9-60
Economy Driving . . . . . . . . . . . . . 1-23
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . 9-62
Filling the Tank . . . . . . . . . . . . . . . 9-61
Foreign Countries . . . . . . . . . . . . 9-60
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 5-12
Low Fuel Warning Light . . . . . . . 5-24
Requirements, California . . . . . 9-59
System Messages . . . . . . . . . . . . 5-39 Fuses
Engine Compartment
Fuse Block . . . . . . . . . . . . . . . . 10-36
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . 10-35
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . 10-40
G
Garage Door Opener . . . . . . . . . . 5-51
Programming . . . . . . . . . . . . . . . . . 5-51
Gauges Engine Coolant
Temperature . . . . . . . . . . . . . . . . 5-13
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
Odometer . . . . . . . . . . . . . . . . . . . . . 5-11
Speedometer . . . . . . . . . . . . . . . . . 5-11
Tachometer . . . . . . . . . . . . . . . . . . . 5-11
Warning Lights and Indicators . . . . . . . . . . . . . . . . . . . . 5-7 General Information
Service and Maintenance . . . . . 11-1
Towing . . . . . . . . . . . . . . . . . . . . . . . . 9-63
Vehicle Care . . . . . . . . . . . . . . . . . . 10-2
Glove Box . . . . . . . . . . . . . . . . . . . . . . 4-1
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . 13-5
H
Halogen Bulbs . . . . . . . . . . . . . . . . 10-31
Hazard Warning Flashers . . . . . . . 6-4
Head Restraints . . . . . . . . . . . . . . . . 3-2
Head-up Display . . . . . . . . . . . . . . . 5-31
Headlamps
Adaptive ForwardLighting (AFL) . . . . . . . . . . . . . . . . 6-3
Aiming . . . . . . . . . . . . . . . . . . . . . . 10-31
Automatic . . . . . . . . . . . . . . . . . . . . . . 6-3
Bulb Replacement . . . . . . . . . . 10-31
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . . . 6-2

Black plate (6,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
i-6 INDEX
Headlamps (cont'd)Flash-to-Pass . . . . . . . . . . . . . . . . . . 6-2
High Intensity Discharge
(HID) Lighting . . . . . . . . . . . . . 10-31
High-Beam On Light . . . . . . . . . . 5-25
High/Low Beam Changer . . . . . . 6-2
Lamps On Reminder . . . . . . . . . 5-25
Heated Steering Wheel . . . . . . . . . . . . . . . . 5-3
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Heated Mirrors . . . . . . . . . . . . . . . . . 2-19
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . 9-22
High Voltage Devices and Wiring . . . . . . . . . . . . . . . . . . . . . . . 10-34
High-Beam On Light . . . . . . . . . . . 5-25
High-Speed Operation . . . . . . . . 10-51
Hill and Mountain Roads . . . . . . . . 9-7
Hill Start Assist (HSA) . . . . . . . . . 9-33
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
How to Wear Safety Belts Properly . . . . . . . . . . . . . . . . . . . . . . 3-14I
Ignition Positions . . . . . . . . 9-15, 9-16
Ignition Transmission LockCheck . . . . . . . . . . . . . . . . . . . . . . . 10-29
Immobilizer . . . . . . . . . . . . . . . . . . . . 2-16
Indicator Vehicle Ahead . . . . . . . . . . . . . . . . 5-21
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . 3-35
Information Energy . . . . . . . . . . . . . . . . . . . . . . . 5-27
Infotainment . . . . . . . . . . . . . . . . . . . . 7-1
Infotainment System . . . . . . . . . . 13-15
Instrument Cluster . . . . . . . . . . . . . . 5-8
Interior Rearview Mirrors . . . . . . . 2-19
Introduction . . . . . . . . . . . . . . . . . . . . . . . iii
J
Jump Starting . . . . . . . . . .10-78, 10-79
K
Key and Lock Messages . . . . . . . 5-39
Keyless Entry Remote (RKE) System . . . . . . . . 2-3
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
L
Labeling, Tire Sidewall . . . . . . . . 10-44
Lamps Daytime Running (DRL) . . . . . . . 6-2
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Exterior Controls . . . . . . . . . . . . . . . 6-1
Exterior Lamps OffReminder . . . . . . . . . . . . . . . . . . . . 6-2
Fog . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Headlamps, Front Turn Signal, and Parking
Lamps . . . . . . . . . . . . . . . . . . . . 10-32
License Plate . . . . . . . . . . . . . . . 10-33
Malfunction Indicator . . . . . . . . . 5-16
Messages . . . . . . . . . . . . . . . . . . . . 5-40