2019 BUICK LACROSSE alarm

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
8 In Brief
Initial Drive
Information
This section provides a brief
overview about some of the
important features that may or may
not be on your specific vehicle.
For more detailed information, refer
to each of the features which can be
found later in this owner’s manual.
Stop/Start System
If equipped, the Stop/Start system
will shut off the engine to help
conserve fuel. It has components
designed for the increased number
of starts.
When the brakes are applied and
the vehicle is at a complete stop,
the engine may turn off. When
stopped, the tachometer displays
AUTO STOP. SeeTachometer
0 116. When the brake pedal is
released or the accelerator pedal is
pressed, the engine will restart.
See Stop/Start System (Without
eAssist) 0178 orStop/Start System
(With eAssist) 0179.
Remote Keyless Entry
(RKE) System
The Remote Keyless Entry (RKE)
transmitter may work up to 60 m
(197 ft) away from the vehicle.
Q:Press to lock all doors.
K:Press to unlock the driver door
or all doors.
Lock and unlock feedback can be
personalized. See Vehicle
Personalization 0138.
X:Press twice quickly to release
the trunk.
7: Press and release to initiate
vehicle locator. Press and hold for at
least three seconds to sound the
panic alarm. Press again to cancel
the panic alarm.
See Keys 028 and Remote Keyless
Entry (RKE) System Operation 029.
Remote Vehicle Start
The engine can be started from
outside of the vehicle.
Starting the Vehicle
1. Press and releaseQon the
RKE transmitter.
2. Immediately press and hold
/
for at least four seconds or until
the turn signal lamps flash.
Start the vehicle normally after
entering.
When the vehicle starts, the parking
lamps will turn on.
Remote start can be extended.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
28 Keys, Doors, and Windows
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . . 29
Remote Keyless Entry (RKE) System Operation . . . . . . . . . . . . 29
Remote Vehicle Start . . . . . . . . . . 35
Door Locks . . . . . . . . . . . . . . . . . . . . 37
Power Door Locks . . . . . . . . . . . . . 39
Delayed Locking . . . . . . . . . . . . . . . 39
Automatic Door Locks . . . . . . . . . 39
Lockout Protection . . . . . . . . . . . . . 40
Safety Locks . . . . . . . . . . . . . . . . . . . 40
Doors
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . 43
Vehicle Alarm System . . . . . . . . . 43
Immobilizer . . . . . . . . . . . . . . . . . . . . 44
Immobilizer Operation . . . . . . . . . 44
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . 45
Power Mirrors . . . . . . . . . . . . . . . . . . 45 Folding Mirrors . . . . . . . . . . . . . . . . . 46
Heated Mirrors . . . . . . . . . . . . . . . . . 46
Automatic Dimming Mirror . . . . . 46
Reverse Tilt Mirrors . . . . . . . . . . . . 46
Interior Mirrors
Interior Rearview Mirrors . . . . . . . 47
Automatic Dimming Rearview
Mirror . . . . . . . . . . . . . . . . . . . . . . . . . 47
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . 47
Power Windows . . . . . . . . . . . . . . . 47
Sun Visors . . . . . . . . . . . . . . . . . . . . . 49
Rear Window Sunshade . . . . . . . 50
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 50
Keys and Locks
Keys
{Warning
Leaving children in a vehicle with
a Remote Keyless Entry (RKE)
transmitter is dangerous and
children or others could be
seriously injured or killed. They
could operate the power windows
or other controls or make the
vehicle move. The windows will
function with the RKE transmitter
in the vehicle, and children or
others could be caught in the path
of a closing window. Do not leave
children in a vehicle with an RKE
transmitter.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
30 Keys, Doors, and Windows
Other conditions can impact the
performance of the transmitter. See
Remote Keyless Entry (RKE)
System Operation029.
Q:Press to lock all doors.
The turn signal indicators may flash
and/or the horn may sound on the
second press to indicate locking.
See Vehicle Personalization 0138.
If the driver door is open when
Qis
pressed and Unlocked Door
Anti-Lockout is enabled, all doors will lock and then the driver door will
immediately unlock. See
Vehicle
Personalization 0138.
If the passenger door is open when
Qis pressed, all doors lock.
Pressing
Qmay also arm the
theft-deterrent system. See Vehicle
Alarm System 043.
K:Press to unlock the driver door.
Press again within five seconds to
unlock all doors. The RKE
transmitter can be programmed to
unlock all doors on the first button
press. See Vehicle Personalization
0 138.
The turn signal indicators may flash
to indicate unlocking. See Vehicle
Personalization 0138.
Pressing
Kwill disarm the
theft-deterrent system. See Vehicle
Alarm System 043.
Memory seat positions may be
recalled when unlocking the vehicle.
See Memory Seats 056 and
Vehicle Personalization 0138.
X:Press twice quickly to release
the trunk.
7: Press and release to initiate
vehicle locator. The exterior lamps
flash and the horn chirps three
times.
Press and hold
7for at least
three seconds to sound the panic
alarm. The horn sounds and the
turn signals flash for 30 seconds,
or until
7is pressed again or the
vehicle is started.
/: Press and releaseQand then
immediately press and hold
/for at
least four seconds to start the
engine from outside the vehicle
using the RKE transmitter. See
Remote Vehicle Start 035.
Keyless Access Operation
The Keyless Access system allows
for locking and unlocking the doors
and accessing the trunk without
removing the RKE transmitter from
your pocket, purse, briefcase, etc.
The RKE transmitter should be

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
Keys, Doors, and Windows 43
Vehicle Security
This vehicle has theft-deterrent
features; however, they do not make
the vehicle impossible to steal.
Vehicle Alarm System
This vehicle has an anti-theft alarm
system.
The indicator light, on the
instrument panel near the
windshield, indicates the status of
the system.
Off :Alarm system is disarmed. On Solid :
Vehicle is secured
during the delay to arm the system.
Fast Flash : Vehicle is unsecured.
A door, the hood, or the trunk
is open.
Slow Flash : Alarm system is
armed.
Arming the Alarm System
1. Turn off the vehicle.
2. Lock the vehicle in one of three ways:
.Use the RKE transmitter.
. Use the Keyless Access
system.
. With a door open, press
Q
on the interior of the door.
3. After 30 seconds the alarm system will arm, and the
indicator light will begin to
slowly flash indicating the
alarm system is operating.
Pressing
Qon the RKE
transmitter a second time will bypass the 30-second delay
and immediately arm the alarm
system.
The vehicle alarm system will not
arm if the doors are locked with
the key.
If the driver door is opened without
first unlocking with the RKE
transmitter, the horn will chirp and
the lights will flash to indicate
pre-alarm. If the vehicle is not
started, or the door is not unlocked
by pressing
Kon the RKE
transmitter during the 10-second
pre-alarm, the alarm will be
activated.
The alarm will also be activated if a
passenger door, the trunk, or the
hood is opened without first
disarming the system. When the
alarm is activated, the turn signals
flash and the horn sounds for about
30 seconds. The alarm system will
then re-arm to monitor for the next
unauthorized event.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
44 Keys, Doors, and Windows
Disarming the Alarm System
To disarm the alarm system or turn
off the alarm if it has been activated,
do one of the following:
.Press
Kon the RKE transmitter.
. Unlock the vehicle using the
Keyless Access system.
. Start the vehicle.
To avoid setting off the alarm by
accident:
. Lock the vehicle after all
occupants have left the vehicle
and all doors are closed.
. Always unlock a door with the
RKE transmitter or use the
Keyless Access system.
Unlocking the driver door with the
key will not disarm the alarm system
or turn off the alarm.
How to Detect a Tamper
Condition
IfKis pressed on the transmitter
and the horn chirps and the lights
flash three times, the alarm was
activated while the system was
armed.
If the alarm has been activated, a
message will appear on the Driver
Information Center (DIC).
Immobilizer
See Radio Frequency Statement
0 345.
Immobilizer Operation
This vehicle has a passive
theft-deterrent system.
The system does not have to be
manually armed or disarmed.
The vehicle is automatically
immobilized when the transmitter
leaves the vehicle. The immobilization system is
disarmed when the ignition button is
pressed and a valid transmitter is
found in the vehicle.
The security light on the instrument
cluster comes on when there is a
problem with arming or disarming
the theft-deterrent system.
The system has one or more
transmitters matched to an
immobilizer control unit in the
vehicle. Only a correctly matched
transmitter will start the vehicle.
If the transmitter is ever damaged,
you may not be able to start the
vehicle.
When trying to start the vehicle, the
security light comes on briefly when
the ignition is turned on.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
OnStar 351
Security
If equipped, OnStar provides these
services:
.With Stolen Vehicle Assistance,
OnStar Advisors can use GPS to
pinpoint the vehicle and help
authorities quickly recover it.
. With Remote Ignition Block,
if equipped, OnStar can block
the engine from being restarted.
. With Stolen Vehicle Slowdown,
if equipped, OnStar can work
with law enforcement to
gradually slow the vehicle down.
Theft Alarm Notification
If equipped, if the doors are locked
and the vehicle alarm sounds, a
notification by text, e-mail, or phone
call will be sent. If the vehicle is
stolen, an OnStar Advisor can work
with authorities to recover the
vehicle.
OnStar Additional
Information
In-Vehicle Audio Messages
Audio messages may play important
information at the following times:
.Prior to vehicle purchase. Press
Qto set up an account.
. After change in ownership and
at 90 days.
Transferring Service
PressQto request account transfer
eligibility information. The Advisor
can cancel or change account
information.
Selling/Transferring the
Vehicle
Call 1-888-4ONSTAR
(1-888-466-7827) immediately to
terminate your OnStar or connected
services if the vehicle is disposed
of, sold, transferred, or if the
lease ends.
Reactivation for Subsequent
Owners
PressQand follow the prompts to
speak to an Advisor as soon as
possible. The Advisor will update
vehicle records and explain OnStar
or connected service options.
How OnStar Service Works
Automatic Crash Response,
Emergency Services, Crisis Assist,
Stolen Vehicle Assistance, Remote
Services, Roadside Assistance, and
Hands-Free Calling are available on
most vehicles. Not all OnStar
services are available everywhere
or on all vehicles. For more
information, a full description of
OnStar services, system limitations,
and OnStar User Terms, Privacy
Statement, and Software Terms:
. Call 1-888-4ONSTAR
(1-888-466-7827).
. See www.onstar.com (U.S.).
. See www.onstar.ca (Canada).
. Call TTY 1-877-248-2080.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
Index 361
IndexA
Accessories andModifications . . . . . . . . . . . . . . . . . . 236
Accessory Power . . . . . . . . . . . . . . . 181
Active Fuel Management . . . . . . . 185
Adaptive Cruise Control . . . . . . . . 201
Adaptive Forward Lighting (AFL) . . . . . . . . . . . . . . . . . 151
Adaptive Forward Lighting (AFL) Light . . . . . . . . . . . . . . . . . . . . 129
Add-On Electrical Equipment . . . 233
Additional Information OnStar . . . . . . . . . . . . . . . . . . . . . . . 351
Additional Maintenance
and Care . . . . . . . . . . . . . . . . . . . . . . 326
Adjustments Lumbar, Front Seats . . . . . . . . . . . . 55
Air Cleaner/Filter, Engine . . . . . . . 245
Air Conditioning . . . . . . . . . . . . . . . . 157
Air Filter, Passenger Compartment . . . . . . . . . . . . . . . . . 163
Air Intake . . . . . . . . . . . . . . . . . . . . . . . 163
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 162
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . 82
How Does an AirbagRestrain? . . . . . . . . . . . . . . . . . . . . . 75
Passenger Sensing System . . . . 77 Airbag System (cont'd)
What Makes an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 75
What Will You See after an
Airbag Inflates? . . . . . . . . . . . . . . . 75
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 74
Where Are the Airbags? . . . . . . . . 72
Airbags
Adding Equipment to theVehicle . . . . . . . . . . . . . . . . . . . . . . . . 81
Passenger Status Indicator . . . 121
Readiness Light . . . . . . . . . . . . . . 121
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . . . 81
System Check . . . . . . . . . . . . . . . . . . 71
Alarm Vehicle Security . . . . . . . . . . . . . . . . 43
Alert Lane Change . . . . . . . . . . . . . . . . . 220
Side Blind Zone (SBZA) . . . . . . 220
All-Season Tires . . . . . . . . . . . . . . . . 268
All-Wheel Drive . . . . . . . . . . . . 192, 256
Antilock Brake System (ABS) . . . 193 Warning Light . . . . . . . . . . . . . . . . . 125
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . 309
Interior . . . . . . . . . . . . . . . . . . . . . . . . 313

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
Index 369
Replacing LATCH SystemParts after a Crash . . . . . . . . . . . . . 96
Replacing Seat Belt System Parts after a Crash . . . . . . . . . . . . . 70
Reporting Safety Defects Canadian Government . . . . . . . . 346
General Motors . . . . . . . . . . . . . . . 346
U.S. Government . . . . . . . . . . . . . 345
Restraints Where to Put . . . . . . . . . . . . . . . . . . . 89
Retained Accessory
Power (RAP) . . . . . . . . . . . . . . . . . . 181
Reverse Tilt Mirrors . . . . . . . . . . . . . . 46
Ride Control Systems Selective . . . . . . . . . . . . . . . . . . . . . 198
Roads
Driving, Wet . . . . . . . . . . . . . . . . . . 169
Roadside Assistance Program . . . . . . . . . . . . . . . . . . . . . . . 339
Roof Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . 50
Rotation, Tires . . . . . . . . . . . . . . . . . . 281
Routing, Engine Drive Belt . . . . . . 334
Running the Vehicle While Parked . . . . . . . . . . . . . . . . . . . . . . . . 186S
Safety Defects Reporting
Canadian Government . . . . . . . . 346
General Motors . . . . . . . . . . . . . . . 346
U.S. Government . . . . . . . . . . . . . 345
Safety Locks . . . . . . . . . . . . . . . . . . . . . 40
Safety System Check . . . . . . . . . . . . 69
Scheduling Appointments . . . . . . . 341
Sealant Kit, Tire . . . . . . . . . . . . . . . . 289
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . 63 Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Extender . . . . . . . . . . . . . . . . . . . . . . . . 69
How to Wear Seat BeltsProperly . . . . . . . . . . . . . . . . . . . . . . . 64
Lap-Shoulder Belt . . . . . . . . . . . . . . 66
Reminders . . . . . . . . . . . . . . . . . . . . 120
Replacing after a Crash . . . . . . . . 70
Use During Pregnancy . . . . . . . . . . 69
Seats
Head Restraints . . . . . . . . . . . . . . . . 53
Heated and Ventilated Front . . . . 59
Lumbar Adjustment, Front . . . . . . 55
Memory . . . . . . . . . . . . . . . . . . . . . . . . . 56
Power Adjustment, Front . . . . . . . 54
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Reclining Seatbacks . . . . . . . . . . . . 55
Securing Child Restraints . . . . 97, 99 Security
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 129
OnStar . . . . . . . . . . . . . . . . . . . . . . . 351
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 43
Vehicle Alarm . . . . . . . . . . . . . . . . . . . 43
Selective Ride Control . . . . . . . . . . 198
Service . . . . . . . . . . . . . . . . . . . . . . . . . 163 Accessories andModifications . . . . . . . . . . . . . . . . 236
Doing Your Own Work . . . . . . . . 236
Maintenance Records . . . . . . . . 331
Maintenance, General Information . . . . . . . . . . . . . . . . . . 318
Parts Identification Label . . . . . 332
Scheduling Appointments . . . . . 341
Service Electric Parking
Brake Light . . . . . . . . . . . . . . . . . . . . 125
Services Special Application . . . . . . . . . . . 325
Servicing the Airbag . . . . . . . . . . . . . 81
Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . 182
Out of Park . . . . . . . . . . . . . . . . . . . 182
Side Blind Zone Alert (SBZA) . . . 220
Signals, Turn and Lane-Change . . . . . . . . . . . . . . . . . 152
Spare Tire Compact . . . . . . . . . . . . . . . . . . . . . . 300