2018 BUICK LACROSSE Owner's Manual

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
24 In Brief
Regenerative Braking
Regenerative braking takes some of
the energy from the moving vehicle
and turns it into electrical energy.
This energy is then stored in the
vehicle's high voltage battery
system, contributing to increased
fuel efficiency.
The system works whenever the
accelerator pedal is released, and
increases the energy captured as
more brake pedal is applied.
Battery
This vehicle has a standard 12-volt
battery. Refer to the replacement
number on the original battery label
when a new standard 12-volt battery
is needed.
Vehicles with eAssist also have a
high voltage battery. Only a trained
service technician with the proper
knowledge and tools should inspect,
test, or replace the high voltage
battery. See your dealer if the high
voltage battery needs service. See
Battery - North America0247.
Service
Never try to do your own service on
eAssist components. You can be
injured and the vehicle can be
damaged if you try to do your own
service work. Service and repair of
these high voltage components
should only be performed by a
trained service technician with the
proper knowledge and tools. See
Doing Your Own Service Work
0229.
Performance and
Maintenance
Traction Control/
Electronic Stability
Control
The Traction Control System (TCS)
limits wheel spin. The system turns
on automatically every time the
vehicle is started.
.
To turn off TCS, press and
release
gon the center stack.
iilluminates.
. Press and release
gagain to
turn on TCS.
. To turn off both TCS and
StabiliTrak, press and hold
g
untiliandgilluminate.
. Press and release
gto turn on
both systems.
See Traction Control/Electronic
Stability Control 0190.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
In Brief 25
Tire Pressure Monitor
This vehicle may have a Tire
Pressure Monitor System (TPMS).
The low tire pressure warning light
alerts to a significant loss in
pressure of one of the vehicle's
tires. If the warning light comes on,
stop as soon as possible and inflate
the tires to the recommended
pressure shown on the Tire and
Loading Information label. See
Vehicle Load Limits0166. The
warning light will remain on until the
tire pressure is corrected.
The low tire pressure warning light
may come on in cool weather when
the vehicle is first started, and then
turn off as the vehicle is driven. This
may be an early indicator that the
tire pressures are getting low and
the tires need to be inflated to the
proper pressure. The TPMS does not replace normal
monthly tire maintenance. Maintain
the correct tire pressures.
See
Tire Pressure Monitor System
0 268.
Fuel
Regular Fuel
Use only unleaded gasoline rated
87 octane or higher in your vehicle.
Do not use gasoline with an octane
rating lower as it may result in
vehicle damage and lower fuel
economy. See Fuel0218.
E85 or FlexFuel
No E85 or FlexFuel
Gasoline-ethanol fuel blends greater
than E15 (15% ethanol by volume),
such as E85, cannot be used in this
vehicle.
Engine Oil Life System
The engine oil life system calculates
engine oil life based on vehicle use
and displays the CHANGE ENGINE
OIL SOON message when it is time
to change the engine oil and filter.
The oil life system should be reset
to 100% only following an oil
change.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
26 In Brief
Resetting the Oil Life System1. Using the DIC controls on the right side of the steering wheel,
display REMAINING OIL LIFE
on the DIC. See Driver
Information Center (DIC) 0126.
When remaining oil life is low,
the CHANGE ENGINE OIL
SOON message will appear on
the display.
2. Press
Von the DIC controls
and hold down for a few
seconds to clear the CHANGE
ENGINE OIL SOON message
and reset the oil life at 100%.
Be careful not to reset the oil
life display accidentally at any
time other than after the oil is
changed. It cannot be reset
accurately until the next oil
change.
See Engine Oil Life System 0237.
Driving for Better Fuel
Economy
Driving habits can affect fuel
mileage. Here are some driving tips
to get the best fuel economy
possible.
.
Avoid fast starts and accelerate
smoothly.
. Brake gradually and avoid
abrupt stops.
. Avoid idling the engine for long
periods of time.
. When road and weather
conditions are appropriate, use
cruise control.
. Always follow posted speed
limits or drive more slowly when
conditions require.
. Keep vehicle tires properly
inflated.
. Combine several trips into a
single trip.
. Replace the vehicle's tires with
the same TPC Spec number
molded into the tire's sidewall
near the size. .
Follow recommended scheduled
maintenance.Roadside Assistance
Program
U.S.: 1-800-252-1112
TTY Users (U.S. Only):
1-888-889-2438
Canada: 1-800-268-6800
New Buick owners are automatically
enrolled in the Roadside Assistance
Program.
See Roadside Assistance Program
0 329.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
Keys, Doors, and Windows 27
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . . 28
Remote Keyless Entry (RKE) System Operation . . . . . . . . . . . . 28
Remote Vehicle Start . . . . . . . . . . 34
Door Locks . . . . . . . . . . . . . . . . . . . . 36
Power Door Locks . . . . . . . . . . . . . 38
Delayed Locking . . . . . . . . . . . . . . . 38
Automatic Door Locks . . . . . . . . . 39
Lockout Protection . . . . . . . . . . . . . 39
Safety Locks . . . . . . . . . . . . . . . . . . . 39
Doors
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . 42
Vehicle Alarm System . . . . . . . . . 42
Immobilizer . . . . . . . . . . . . . . . . . . . . 43
Immobilizer Operation . . . . . . . . . 43
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . 44
Power Mirrors . . . . . . . . . . . . . . . . . . 45 Folding Mirrors . . . . . . . . . . . . . . . . . 45
Heated Mirrors . . . . . . . . . . . . . . . . . 45
Automatic Dimming Mirror . . . . . 45
Reverse Tilt Mirrors . . . . . . . . . . . . 45
Interior Mirrors
Interior Rearview Mirrors . . . . . . . 46
Automatic Dimming Rearview
Mirror . . . . . . . . . . . . . . . . . . . . . . . . . 46
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . 46
Power Windows . . . . . . . . . . . . . . . 47
Sun Visors . . . . . . . . . . . . . . . . . . . . . 49
Rear Window Sunshade . . . . . . . 49
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 49
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-10999169) -
2018 - crc - 3/28/17
28 Keys, Doors, and Windows
The vehicle has the keyless ignition.
The key can be used for the locks.
Press the button on the RKE
transmitter to access the key.If it becomes difficult to turn the key
in a vehicle lock, inspect the key
blade for debris. Periodically clean
with a brush or pick.
See your dealer if a new key is
needed.
With an active OnStar subscription,
an OnStar Advisor may remotely
unlock the vehicle. See
OnStar
Overview 0339.
Remote Keyless Entry
(RKE) System
See Radio Frequency Statement
0 335.
If there is a decrease in the Remote
Keyless Entry (RKE) operating
range:
. Check the distance. The
transmitter may be too far from
the vehicle.
. Check the location. Other
vehicles or objects may be
blocking the signal.
. Check the transmitter's battery.
See “Battery Replacement” later
in this section. .
If the transmitter is still not
working correctly, see your
dealer or a qualified technician
for service.
Remote Keyless Entry
(RKE) System Operation
The Keyless Access system allows
for vehicle entry when the Remote
Keyless Entry (RKE) transmitter is
within 1 m (3 ft). See “Keyless
Access Operation” later in this
section.
The RKE transmitter functions may
work up to 60 m (197 ft) away from
the vehicle.
Other conditions can impact the
performance of the transmitter.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
Keys, Doors, and Windows 29
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 0133.
If the driver door is open when
Qis
pressed and enabled through
vehicle personalization, all doors will
lock and the driver door will
immediately unlock.
If the passenger door is open when
Qis pressed, all doors lock.
Pressing
Qmay also arm the
theft-deterrent system. See Vehicle
Alarm System 042.
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
0 133.
The turn signal indicators may flash
to indicate unlocking. See Vehicle
Personalization 0133.
Pressing
Kwill disarm the
theft-deterrent system. See Vehicle
Alarm System 042.
Memory seat positions may be
recalled when unlocking the vehicle.
See Memory Seats 055 and
Vehicle Personalization 0133.
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
until
7is pressed again or the
vehicle is started.
/: If equipped, pressQand
release and 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 034.
Keyless Access Operation
If equipped with a Keyless Access
system, it 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 within 1 m (3 ft) of the
trunk or door being opened. If the
vehicle has this feature, there will be
buttons on the outside of the door
handles.
Keyless Access can be
programmed to unlock all doors on
the first unlock/lock button press
from the driver door. See Vehicle
Personalization 0133.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
30 Keys, Doors, and Windows
If equipped with memory seats, RKE
transmitters 1 and 2 are linked to
seating positions of memory 1 or 2.
SeeMemory Seats 055.
Keyless Unlocking/Locking from
the Driver Door
When the doors are locked and the
RKE transmitter is within 1 m (3 ft)
of the driver door handle, pressing
the lock/unlock button on the driver
door handle will unlock the driver
door. If the lock/unlock button is
pressed again within five seconds,
all passenger doors will unlock.Pressing the lock/unlock button will
cause all doors to lock if any of the
following occur:
. It has been more than
five seconds since the first lock/
unlock button press.
. Two lock/unlock button presses
were used to unlock all doors.
. Any vehicle door has opened
and all doors are now closed.
Keyless Unlocking/Locking from
Passenger Doors
When the doors are locked and the
RKE transmitter is within 1 m (3 ft)
of the door handle, pressing the
lock/unlock button on that door
handle will unlock all doors.
Pressing the lock/unlock button will
cause all doors to lock if any of the
following occur:
. The lock/unlock button was used
to unlock all doors.
. Any vehicle door has opened
and all doors are now closed. Passive Locking
With Keyless Access the vehicle will
lock several seconds after all doors
are closed if the vehicle is off and at
least one transmitter has been
removed or none remain in the
interior.
If other electronic devices interfere
with the RKE transmitter signal, the
vehicle may not detect the RKE
transmitter inside the vehicle.
If passive locking is enabled, the
doors may lock with the RKE
transmitter inside the vehicle. Do
not leave the RKE transmitter in an
unattended vehicle.
To customize the doors to
automatically lock when exiting the
vehicle, see
Vehicle Personalization
0 133.
Temporary Disable of Passive
Locking Feature
Temporarily disable passive locking
by pressing and holding
Kon the
interior door switch with a door open
for at least four seconds, or until
three chimes are heard. Passive
locking will then remain disabled

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
Keys, Doors, and Windows 31
untilQon the interior door is
pressed, or until the vehicle is
turned on.
Remote Left in Vehicle Alert
When the vehicle is turned off and
an RKE transmitter is left in the
vehicle, the horn will chirp three
times after all doors are closed. To
turn on or off see Vehicle
Personalization 0133.
Remote No Longer in Vehicle Alert
If the vehicle is on, with a door
open, and then all doors are closed,
the vehicle will check for RKE
transmitters inside. If an RKE
transmitter is not detected, the DIC
will display NO REMOTE
DETECTED and the horn will chirp
three times.
This occurs only once each time the
vehicle is driven.
See Vehicle Personalization 0133.
Key Access
To access a vehicle with a weak
transmitter battery, see Door Locks
0 36.Programming Transmitters to
the Vehicle
Only RKE transmitters programmed
to the vehicle will work. If a
transmitter is lost or stolen, a
replacement can be purchased and
programmed through your dealer.
The vehicle can be reprogrammed
so that lost or stolen transmitters no
longer work. Any remaining
transmitters will need to be
reprogrammed. Each vehicle can
have up to eight transmitters
matched to it.
Programming with Recognized
Transmitters
A new transmitter can be
programmed to the vehicle when
there are two recognized
transmitters. To program, the vehicle
must be off and all of the
transmitters, both currently
recognized and new, must be
with you.
1. Place the two recognized transmitters in the cupholder. 2. Remove the key lock cylinder
cap on the driver door handle.
See Door Locks 036.
3. Insert the vehicle key of the new transmitter into the key
lock cylinder on the outside of
the driver door and turn the key
to the unlock position five times
within 10 seconds.
The Driver Information Center
(DIC) displays READY FOR
REMOTE #2, 3, 4, or 5.
4. Place the new transmitter intothe transmitter pocket inside
the armrest storage area.