2015 BUICK LACROSSE differential

Black plate (1,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
Driving and Operating 9-1
Driving and
Operating
Driving Information
Distracted Driving . . . . . . . . . . . . . 9-2
Defensive Driving . . . . . . . . . . . . . 9-3
Drunk Driving . . . . . . . . . . . . . . . . . 9-3
Control of a Vehicle . . . . . . . . . . . 9-3
Braking . . . . . . . . . . . . . . . . . . . . . . . 9-3
Steering . . . . . . . . . . . . . . . . . . . . . . . 9-4
Off-Road Recovery . . . . . . . . . . . . 9-5
Loss of Control . . . . . . . . . . . . . . . . 9-6
Driving on Wet Roads . . . . . . . . . 9-6
Hill and Mountain Roads . . . . . . 9-7
Winter Driving . . . . . . . . . . . . . . . . . 9-8
If the Vehicle Is Stuck . . . . . . . . . 9-9
Vehicle Load Limits . . . . . . . . . . 9-10
Starting and Operating
New Vehicle Break-In . . . . . . . . 9-14
Ignition Positions (KeyAccess) . . . . . . . . . . . . . . . . . . . . 9-15
Ignition Positions (Keyless Access) . . . . . . . . . . . . . . . . . . . . 9-16
Starting the Engine . . . . . . . . . . 9-18
Engine Heater . . . . . . . . . . . . . . . 9-22 Retained Accessory
Power (RAP) . . . . . . . . . . . . . . . 9-23
Shifting Into Park . . . . . . . . . . . . 9-24
Shifting out of Park . . . . . . . . . . 9-25
Parking over Things That Burn . . . . . . . . . . . . . . . . . . 9-25
Engine Exhaust
Engine Exhaust . . . . . . . . . . . . . . 9-26
Running the Vehicle WhileParked . . . . . . . . . . . . . . . . . . . . . 9-26
Automatic Transmission
Automatic Transmission . . . . . 9-27
Manual Mode . . . . . . . . . . . . . . . . 9-29
Drive Systems
All-Wheel Drive . . . . . . . . . . . . . . 9-30
Brakes
Antilock BrakeSystem (ABS) . . . . . . . . . . . . . . 9-30
Parking Brake . . . . . . . . . . . . . . . 9-31
Brake Assist . . . . . . . . . . . . . . . . . 9-33
Hill Start Assist (HSA) . . . . . . . 9-33
Ride Control Systems
Traction Control/Electronic Stability Control . . . . . . . . . . . . 9-34
Limited-Slip Differential . . . . . . 9-36
Selective Ride Control . . . . . . . 9-36
Cruise Control
Cruise Control . . . . . . . . . . . . . . . 9-37
Adaptive Cruise Control . . . . . 9-39
Driver Assistance Systems
Driver Assistance Systems . . . . . . . . . . . . . . . . . . . . 9-47
Assistance Systems for Parking or Backing . . . . . . . . . 9-48
Assistance Systems for Driving . . . . . . . . . . . . . . . . . . . . . 9-50
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . 9-50
Active Emergency Braking System . . . . . . . . . . . . . . . . . . . . . 9-53
Side Blind Zone Alert (SBZA) . . . . . . . . . . . . . . . 9-54
Lane Change Alert . . . . . . . . . . . 9-55
Lane Departure Warning (LDW) . . . . . . . . . . . . . 9-57

Black plate (36,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
9-36 Driving and Operating
To turn TCS and StabiliTrak on
again, press and release the
g
button. The traction off lightiand
StabiliTrak OFF light
gin the
instrument cluster turn off.
Adding accessories can affect the
vehicle performance. See
Accessories and Modifications on
page 10-3.
Limited-Slip Differential
Vehicles with a limited-slip
differential can give more traction on
snow, mud, ice, sand, or gravel.
It works like a standard differential
most of the time, but when traction
is low, this feature allows the drive
wheel with the most traction to
move the vehicle.
Selective Ride Control
The vehicle may have a ride control
system called Selective Ride
Control. The system provides the
following performance benefits:
.Reduced Impact Harshness
.Improved Road Isolation
.Improved High-Speed Stability
.Improved Handling Response
.Better Control of Body Ride
Motions
To switch from TOUR to SPORT
mode, move the shift lever to the
M/S (Manual/Sport) position. TOUR:
Use for normal city and
highway driving. This setting
provides a smooth, soft ride.
SPORT: Use where road conditions
or personal preference demand
more control. This setting provides
more “feel,” or response to road
conditions through increased
steering effort and suspension
tuning.
The setting can be changed at any
time. Based on road conditions,
steering wheel angle, and vehicle
speed, the system automatically
adjusts to provide the best handling
while providing a smooth ride. The
TOUR and SPORT modes will feel
similar on a smooth road.

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 (7,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
INDEX i-7
Lamps (cont'd)On Reminder . . . . . . . . . . . . . . . . . 5-25
Reading . . . . . . . . . . . . . . . . . . . . . . . 6-6
Sun Visor . . . . . . . . . . . . . . . . . . . . . . 6-6
Lane Change Alert . . . . . . . . . . . . 9-55
Lane Departure Warning (LDW) . . . . . . . . . . . . . . . 9-57
Lane Departure Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . 5-21
Lap-Shoulder Belt . . . . . . . . . . . . . 3-15
LATCH System Replacing Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . 3-48
LATCH, Lower Anchors and
Tethers for Children . . . . . . . . . . 3-41
LED Lighting . . . . . . . . . . . . . . . . . . 10-31
Light Adaptive Forward Lighting
(AFL) Light . . . . . . . . . . . . . . . . . . 5-25
Lighting Adaptive Forward . . . . . . . . . . . . . . 6-3
Entry . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Illumination Control . . . . . . . . . . . . 6-5
LED . . . . . . . . . . . . . . . . . . . . . . . . 10-31 Lights
Airbag Readiness . . . . . . . . . . . . . 5-14
Antilock Brake System
(ABS) Warning . . . . . . . . . . . . . . 5-20
Brake System Warning . . . . . . . 5-19
Charging System . . . . . . . . . . . . . 5-16
Cruise Control . . . . . . . . . . . . . . . . 5-25
Door Ajar . . . . . . . . . . . . . . . . . . . . . 5-26
Electric Parking Brake . . . . . . . . 5-20
Engine Coolant Temperature Warning . . . . . . . 5-22
Engine Oil Pressure . . . . . . . . . . 5-23
Flash-to-Pass . . . . . . . . . . . . . . . . . . 6-2
Front Fog Lamp . . . . . . . . . . . . . . 5-25
High-Beam On . . . . . . . . . . . . . . . . 5-25
High/Low Beam Changer . . . . . . 6-2
Lane Departure Warning . . . . . . 5-21
Low Fuel Warning . . . . . . . . . . . . 5-24
Safety Belt Reminders . . . . . . . . 5-14
Security . . . . . . . . . . . . . . . . . . . . . . 5-24
Service Electric Parking Brake . . . . . . . . . . . . . . . . . . . . . . . 5-20
StabiliTrak
®OFF . . . . . . . . . . . . . 5-22 Lights (cont'd)
Tire Pressure . . . . . . . . . . . . . . . . . 5-23
Traction Control System
(TCS)/StabiliTrak
®. . . . . . . . . . 5-22
Traction Off . . . . . . . . . . . . . . . . . . . 5-21
Limited-Slip Differential . . . . . . . . 9-36
Locks Automatic Door . . . . . . . . . . . . . . . 2-12
Delayed Locking . . . . . . . . . . . . . . 2-12
Door . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Lockout Protection . . . . . . . . . . . . 2-12
Power Door . . . . . . . . . . . . . . . . . . . 2-11
Safety . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Loss of Control . . . . . . . . . . . . . . . . . 9-6
Low Fuel Warning Light . . . . . . . . 5-24
Lower Anchors and Tethers
for Children (LATCH
System) . . . . . . . . . . . . . . . . . . . . . . 3-41
Lumbar Adjustment . . . . . . . . . . . . . 3-5 Front Seats . . . . . . . . . . . . . . . . . . . . 3-5

Black plate (13,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
INDEX i-13
TractionControl System (TCS)/
StabiliTrak
®Light . . . . . . . . . . . . 5-22
Limited-Slip Differential . . . . . . . 9-36
Off Light . . . . . . . . . . . . . . . . . . . . . . 5-21
Selective Ride Control . . . . . . . . 9-36
Traction Control/Electronic
Stability Control . . . . . . . . . . . . . . 9-34
Trailer Towing . . . . . . . . . . . . . . . . . . 9-66, 9-67
Transmission
Automatic . . . . . . . . . . . . . . . . . . . . . 9-27
Fluid, Automatic . . . . . . . . . . . . 10-15
Messages . . . . . . . . . . . . . . . . . . . . 5-44
Transportation Program, Courtesy . . . . . . . . . . . . . . . . . . . . . 13-7
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Turn and Lane-Change Signals . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Turn Signal Bulb Replacement . . . . . . . . . . 10-33
U
Uniform Tire Quality
Grading . . . . . . . . . . . . . . . . . . . . . 10-60
Universal Remote System . . . . . 5-51 Operation . . . . . . . . . . . . . . . . . . . . . 5-53
Programming . . . . . . . . . . . . . . . . . 5-51
Using This Manual . . . . . . . . . . . . . . . . iii
V
Vehicle
Alarm System . . . . . . . . . . . . . . . . 2-15
Canadian Owners . . . . . . . . . . . . . . . iii
Control . . . . . . . . . . . . . . . . . . . . . . . . 9-3
IdentificationNumber (VIN) . . . . . . . . . . . . . . . 12-1
Load Limits . . . . . . . . . . . . . . . . . . . 9-10
Messages . . . . . . . . . . . . . . . . . . . . 5-35
Personalization . . . . . . . . . . . . . . . 5-45
Remote Start . . . . . . . . . . . . . . . . . . 2-9
Security . . . . . . . . . . . . . . . . . . . . . . 2-15
Speed Messages . . . . . . . . . . . . . 5-44
Towing . . . . . . . . . . . . . . . . . . . . . . 10-82
Vehicle Ahead Indicator . . . . . . . 5-21 Vehicle Care
Storing the Tire Sealant
and Compressor Kit . . . . . . . 10-72
Tire Pressure . . . . . . . . . . . . . . . 10-50
Vehicle Data Recording and Privacy . . . . . . . . . . . . . . . . . 13-14
Vehicle Diagnostics
OnStar
®. . . . . . . . . . . . . . . . . . . . . . 14-6
Ventilation, Air . . . . . . . . . . . . . . . . . . 8-6
Visors . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Voltage Devices and Wiring . . . . . . . . . . . . . . . . . . . . . . . 10-34
W
WarningBrake System Light . . . . . . . . . . . 5-19
Lane Departure (LDW) . . . . . . . 9-57
Warning Lights, Gauges, and
Indicators . . . . . . . . . . . . . . . . . . . . . 5-7
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . iv Cautions and Danger . . . . . . . . . . . .iv
Hazard Flashers . . . . . . . . . . . . . . . 6-4
Washer Fluid . . . . . . . . . . . . . . . . . 10-24