
Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
Driving and Operating 213
the Lane Change Alert (LCA)
system, read the entire LCA section
before using this feature.
Lane Change Alert (LCA)
If equipped, the LCA system is a
lane-changing aid that assists
drivers with avoiding lane change
crashes that occur with moving
vehicles in the side blind zone (or
spot) areas or with vehicles rapidly
approaching these areas from
behind. The LCA warning display
will light up in the corresponding
outside side mirror and will flash if
the turn signal is on.
{Warning
LCA does not alert the driver to
vehicles outside of the system
detection zones, pedestrians,
bicyclists, or animals. It may not
provide alerts when changing
lanes under all driving conditions.
Failure to use proper care when
changing lanes may result in
injury, death, or vehicle damage.(Continued)
Warning (Continued)
Before making a lane change,
always check mirrors, glance over
your shoulder, and use the turn
signals.
LCA Detection Zones
1. SBZA Detection Zone
2. LCA Detection Zone
The LCA sensor covers a zone of
approximately one lane over from
both sides of the vehicle, or 3.5 m
(11 ft). The height of the zone is
approximately between 0.5 m (1.5 ft)
and 2 m (6 ft) off the ground. The
Side Blind Zone Alert (SBZA)
warning area starts at approximately the middle of the vehicle and goes
back 5 m (16 ft). Drivers are also
warned of vehicles rapidly
approaching from up to 70 m (230 ft)
behind the vehicle.
How the System Works
The LCA symbol lights up in the
side mirrors when the system
detects a moving vehicle in the next
lane over that is in the side blind
zone or rapidly approaching that
zone from behind. A lit LCA symbol
indicates it may be unsafe to
change lanes. Before making a lane
change, check the LCA display,
check mirrors, glance over your
shoulder, and use the turn signals.
Left Side Mirror
DisplayRight Side Mirror Display
When the vehicle is started, both
outside mirror LCA displays will
briefly come on to indicate the

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
214 Driving and Operating
system is operating. When the
vehicle is in a forward gear, the left
or right side mirror display will light
up if a moving vehicle is detected in
the next lane over in that blind zone
or rapidly approaching that zone.
If the turn signal is activated in the
same direction as a detected
vehicle, this display will flash as an
extra warning not to change lanes.
LCA can be disabled through
vehicle personalization using the
Lane Change Alert option. See
“Collision/Detection Systems”under
Vehicle Personalization 0138.
If LCA is disabled by the driver, the
LCA mirror displays will not light up.
When the System Does Not
Seem to Work Properly
The LCA system requires some
driving for the system to calibrate to
maximum performance. This
calibration may occur more quickly if
the vehicle is driving on a straight
highway road with traffic and
roadside objects (e.g., guardrails,
barriers). LCA displays may not come on
when passing a vehicle quickly, for
a stopped vehicle, or when towing a
trailer. The LCA detection zones
that extend back from the side of
the vehicle do not move further back
when a trailer is towed. Use caution
while changing lanes when towing a
trailer. LCA may alert to objects
attached to the vehicle, such as a
trailer, bicycle, or object extending
out to either side of the vehicle.
Attached objects may also interfere
with the detection of vehicles. This
is normal system operation; the
vehicle does not need service.
LCA may not always alert the driver
to vehicles in the next lane over,
especially in wet conditions or when
driving on sharp curves. The system
does not need to be serviced. The
system may light up due to
guardrails, signs, trees, shrubs, and
other non-moving objects. This is
normal system operation; the
vehicle does not need service.
LCA may not operate when the LCA
sensors in the left or right corners of
the rear bumper are covered with
mud, dirt, snow, ice, or slush, or in
heavy rainstorms. For cleaning
instructions, see "Washing the
Vehicle" under
Exterior Care0286.
If the DIC still displays the system
unavailable message after cleaning
both sides of the vehicle toward the
rear corners of the vehicle, see your
dealer.
If the LCA displays do not light up
when moving vehicles are in the
side blind zone or are rapidly
approaching this zone and the
system is clean, the system may
need service. Take the vehicle to
your dealer.Radio Frequency Information
See Radio Frequency Statement
0 321.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
Driving and Operating 221
{Warning
When towing a trailer, exhaust
gases may collect at the rear of
the vehicle and enter if the
liftgate, trunk/hatch, or rear-most
window is open.
When towing a trailer:. Do not drive with the
liftgate, trunk/hatch,
or rear-most window open.
. Fully open the air outlets on
or under the instrument
panel.
. Also adjust the climate
control system to a setting
that brings in only outside
air. See “Climate Control
Systems” in the Index.
For more information about
carbon monoxide, see Engine
Exhaust 0180.
Towing a trailer requires a certain
amount of experience. The
combination you are driving is
longer and not as responsive as the vehicle itself. Get acquainted with
the handling and braking of the rig
before setting out for the open road.
Before starting, check all trailer hitch
parts and attachments, safety
chains, electrical connectors, lamps,
tires, and mirrors. If the trailer has
electric brakes, start the
combination moving and then apply
the trailer brake controller by hand
to be sure the brakes work.
During the trip, check occasionally
to be sure that the load is secure
and the lamps and any trailer
brakes still work.
Following Distance
Stay at least twice as far behind the
vehicle ahead as you would when
driving the vehicle without a trailer.
This can help to avoid heavy
braking and sudden turns.
Passing
More passing distance is needed
when towing a trailer. The
combination will not accelerate as
quickly and is longer so it is
necessary to go much farther
beyond the passed vehicle before
returning to the lane.
Backing Up
Hold the bottom of the steering
wheel with one hand. To move the
trailer to the left, move that hand to
the left. To move the trailer to the
right, move your hand to the right.
Always back up slowly and,
if possible, have someone
guide you.
Making Turns
Caution
Making very sharp turns while
trailering could cause the trailer to
come in contact with the vehicle.
The vehicle could be damaged.
Avoid making very sharp turns
while trailering.
When turning with a trailer, make
wider turns than normal. Do this so
the trailer will not strike soft
shoulders, curbs, road signs, trees,

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
336 Index
ArmrestRear Seat . . . . . . . . . . . . . . . . . . . . . . 58
Armrest Storage . . . . . . . . . . . . . . . . . 98
Assistance Program, Roadside . . . . . . . . . . . . . . . . . . . . . . 315
Assistance Systems for Driving . . . . . . . . . . . . . . . . . . . . . . . . 206
Assistance Systems for Parking and Backing . . . . . . . . . . 203
Automatic Dimming Mirrors . . . . . . . . . . . . . . . . 43
Door Locks . . . . . . . . . . . . . . . . . . . . . 37
Forward Braking . . . . . . . . . . . . . . 209
Headlamp System . . . . . . . . . . . . 149
Transmission . . . . . . . . . . . . . . . . . 181
Transmission Fluid . . . . . . . . . . . 234
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . 185
Automatic Vehicle Hold (AVH) . . . . . . . . . . . . . . . . . . . . 189
B
BatteryLoad Management . . . . . . . . . . . . 153
Power Protection . . . . . . . . . . . . . 154
Voltage and ChargingMessages . . . . . . . . . . . . . . . . . . . 129
Battery - North America . . . . 243, 281
Blade Replacement, Wiper . . . . . 245 Brake
Parking, Electric . . . . . . . . . . . . . . 187
System Warning Light . . . . . . . . .116
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . 242 Antilock . . . . . . . . . . . . . . . . . . . . . . . 186
Assist . . . . . . . . . . . . . . . . . . . . . . . . . 188
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 242
System Messages . . . . . . . . . . . . 129
Braking . . . . . . . . . . . . . . . . . . . . . . . . . 164 Automatic Forward . . . . . . . . . . . 209
Braking System
Front Pedestrian (FPB) . . . . . . . 210
Break-In, New Vehicle . . . . . . . . . . 173
Bulb Replacement . . . . . . . . . . . . . . 248 Headlamp Aiming . . . . . . . . . . . . . 246
Headlamps . . . . . . . . . . . . . . . . . . . 246
High Intensity Discharge(HID) Lighting . . . . . . . . . . . . . . . 246
License Plate Lamps . . . . . . . . . 247
Taillamps, Turn Signal, Stoplamps, and Back-up
Lamps . . . . . . . . . . . . . . . . . . . . . . 247
Buying New Tires . . . . . . . . . . . . . . . 269
C
Calibration . . . . . . . . . . . . . . . . . . . . . . 103
California Fuel Requirements . . . . . . . . . . . 217 California (cont'd)
Perchlorate Materials
Requirements . . . . . . . . . . . . . . . 227
California
Proposition
65 Warning . . . . . . . . . .227, 243, 281
Canadian Vehicle Owners . . . . . . . . 2
Capacities and Specifications . . . . . . . . . . . . . . . . . 309
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . 180
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Winter Driving . . . . . . . . . . . . . . . . 168
Cargo
Tie-Downs . . . . . . . . . . . . . . . . . . . . . . 98
Caution, Danger, and Warning . . . . 2
Center Console Storage . . . . . . . . . 98
Chains, Tire . . . . . . . . . . . . . . . . . . . . 273
Charging Wireless . . . . . . . . . . . . . . . . . . . . . . 106
Charging System Light . . . . . . . . . 114
Check Malfunction Indicator
Engine Light . . . . . . . . . . . . . . . . .114
Child Restraints Infants and Young Children . . . . . 80
Lower Anchors and Tethersfor Children . . . . . . . . . . . . . . . . . . . 85

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
340 Index
Interior Rearview Mirrors . . . . . . . . . 44
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - NorthAmerica . . . . . . . . . . . . . . . . . . . . . . . 281
K
Key and Lock Messages . . . . . . . . 132
Keyless EntryRemote (RKE) System . . . . . . . . . 27
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
L
Labeling, Tire Sidewall . . . . . . . . . . 256
Lamps Daytime Running (DRL) . . . . . . 149
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 152
Exterior Controls . . . . . . . . . . . . . . 148
Exterior Lamps OffReminder . . . . . . . . . . . . . . . . . . . 149
License Plate . . . . . . . . . . . . . . . . . 247
Malfunction Indicator . . . . . . . . . .114
Messages . . . . . . . . . . . . . . . . . . . . 133
On Reminder . . . . . . . . . . . . . . . . . 121
Reading . . . . . . . . . . . . . . . . . . . . . . 152
Sun Visor . . . . . . . . . . . . . . . . . . . . . 153
Lane Change Alert (LCA) . . . . . . . 213
Lane Departure
Warning (LDW) . . . . . . . . . . . . . . . . 215 Lane Keep Assist (LKA) . . . . . . . . 215
Lane Keep Assist Light . . . . . . . . . 117
Lap-Shoulder Belt . . . . . . . . . . . . . . . 61
LATCH System
Replacing Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . . . 91
LATCH, Lower Anchors and
Tethers for Children . . . . . . . . . . . . 85
LED Lighting . . . . . . . . . . . . . . . . . . . . 247
Light Adaptive Forward Lighting
(AFL) Light . . . . . . . . . . . . . . . . . . 121
Lighting Adaptive Forward . . . . . . . . . . . . . 150
Entry . . . . . . . . . . . . . . . . . . . . . . . . . 153
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Illumination Control . . . . . . . . . . . 152
LED . . . . . . . . . . . . . . . . . . . . . . . . . . 247
Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 Airbag Readiness . . . . . . . . . . . . . .113
Antilock Brake System(ABS) Warning . . . . . . . . . . . . . . .117
Brake System Warning . . . . . . . .116
Charging System . . . . . . . . . . . . . .114
Cruise Control . . . . . . . . . . . . . . . . 122
Door Ajar . . . . . . . . . . . . . . . . . . . . . 122
Electric Parking Brake . . . . . . . . .116 Lights (cont'd)
Engine Coolant
Temperature Warning . . . . . . . .119
Engine Oil Pressure . . . . . . . . . . 120
Flash-to-Pass . . . . . . . . . . . . . . . . . 149
Front Fog Lamp . . . . . . . . . . . . . . 121
High-Beam On . . . . . . . . . . . . . . . . 121
High/Low Beam Changer . . . . . 149
Low Fuel Warning . . . . . . . . . . . . 120
Safety Belt Reminders . . . . . . . . .112
Security . . . . . . . . . . . . . . . . . . . . . . 121
Service Electric Parking
Brake . . . . . . . . . . . . . . . . . . . . . . . .117
StabiliTrak®OFF . . . . . . . . . . . . . .118
Tire Pressure . . . . . . . . . . . . . . . . . .119
Traction Control System (TCS)/StabiliTrak
®. . . . . . . . . . .119
Traction Off . . . . . . . . . . . . . . . . . . . .118
Locks Automatic Door . . . . . . . . . . . . . . . . . 37
Delayed Locking . . . . . . . . . . . . . . . . 37
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Lockout Protection . . . . . . . . . . . . . . 37
Power Door . . . . . . . . . . . . . . . . . . . . . 36
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Loss of Control . . . . . . . . . . . . . . . . . 166
Low Fuel Warning Light . . . . . . . . . 120

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-9803782) -
2017 - crc - 9/7/16
Index 343
Retained AccessoryPower (RAP) . . . . . . . . . . . . . . . . . . 178
Reverse Tilt Mirrors . . . . . . . . . . . . . . 43
Ride Control Systems Messages . . . . . . . . . . . . . . . . . . . . 134
Selective . . . . . . . . . . . . . . . . . . . . . 192
Roads
Driving, Wet . . . . . . . . . . . . . . . . . . 166
Roadside Assistance Program . . . . . . . . . . . . . . . . . . . . . . . 315
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . 47
Rotation, Tires . . . . . . . . . . . . . . . . . . 267
Routing, Engine Drive Belt . . . . . . 310
Running the Vehicle While Parked . . . . . . . . . . . . . . . . . . . . . . . . 181
S
Safety Belts . . . . . . . . . . . . . . . . . . . . . 59
Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Extender . . . . . . . . . . . . . . . . . . . . . . . . 64
How to Wear Safety BeltsProperly . . . . . . . . . . . . . . . . . . . . . . . 60
Lap-Shoulder Belt . . . . . . . . . . . . . . 61
Reminders . . . . . . . . . . . . . . . . . . . . .112
Replacing after a Crash . . . . . . . . 65
Use During Pregnancy . . . . . . . . . . 64
Safety Defects Reporting Canadian Government . . . . . . . . 322 Safety Defects Reporting (cont'd)
General Motors . . . . . . . . . . . . . . . 322
U.S. Government . . . . . . . . . . . . . 321
Safety Locks . . . . . . . . . . . . . . . . . . . . . 38
Safety System Check . . . . . . . . . . . . 64
Scheduling Appointments . . . . . . . 317
Seats
Head Restraints . . . . . . . . . . . . . . . . 50
Heated and Ventilated Front . . . . 55
Lumbar Adjustment, Front . . . . . . 52
Memory . . . . . . . . . . . . . . . . . . . . . . . . . 53
Power Adjustment, Front . . . . . . . 51
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Reclining Seatbacks . . . . . . . . . . . . 52
Securing Child Restraints . . . . 92, 94
Security Light . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Messages . . . . . . . . . . . . . . . . . . . . 135
OnStar®. . . . . . . . . . . . . . . . . . . . . . 326
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 40
Vehicle Alarm . . . . . . . . . . . . . . . . . . . 40
Selective Ride Control . . . . . . . . . . 192
Service . . . . . . . . . . . . . . . . . . . . . . . . . 161 Accessories andModifications . . . . . . . . . . . . . . . . 228
Doing Your Own Work . . . . . . . . 228
Engine Soon Light . . . . . . . . . . . . .114
Maintenance Records . . . . . . . . 307 Service (cont'd)
Maintenance, General
Information . . . . . . . . . . . . . . . . . . 296
Parts Identification Label . . . . . 308
Publications Ordering
Information . . . . . . . . . . . . . . . . . . 320
Scheduling Appointments . . . . . 317
Vehicle Messages . . . . . . . . . . . . 135
Service Electric Parking
Brake Light . . . . . . . . . . . . . . . . . . . . 117
Services Special Application . . . . . . . . . . . 302
Servicing the Airbag . . . . . . . . . . . . . 76
Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . 179
Out of Park . . . . . . . . . . . . . . . . . . . 179
Side Blind Zone Alert (SBZA) . . . 212
Signals, Turn and Lane-Change . . . . . . . . . . . . . . . . . 151
Spare Tire Compact . . . . . . . . . . . . . . . . . . . . . . 280
Special Application Services . . . . 302
Specifications and Capacities . . . . . . . . . . . . . . . . . . . . . 309
Speedometer . . . . . . . . . . . . . . . . . . . 110
StabiliTrak OFF Light . . . . . . . . . . . . . . . . . . . . . .118
Start Vehicle, Remote . . . . . . . . . . . 33