automatic transmission BUICK LACROSSE 2019 Owner's Manual

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
In Brief 5
In Brief
Instrument Panel
Instrument Panel . . . . . . . . . . . . . . . . 6
Initial Drive Information
Initial Drive Information . . . . . . . . . . 8
Stop/Start System . . . . . . . . . . . . . . . 8
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . . . 8
Remote Vehicle Start . . . . . . . . . . . 8
Door Locks . . . . . . . . . . . . . . . . . . . . . 9
Trunk Release . . . . . . . . . . . . . . . . . . 9
Windows . . . . . . . . . . . . . . . . . . . . . . . 10
Seat Adjustment . . . . . . . . . . . . . . . 10
Memory Features . . . . . . . . . . . . . . 11
Heated and Ventilated Seats . . . 11
Head Restraint Adjustment . . . . 12
Seat Belts . . . . . . . . . . . . . . . . . . . . . 12
Passenger Sensing System . . . 12
Mirror Adjustment . . . . . . . . . . . . . . 13
Steering Wheel Adjustment . . . . 13
Interior Lighting . . . . . . . . . . . . . . . . 14
Exterior Lighting . . . . . . . . . . . . . . . 15
Windshield Wiper/Washer . . . . . . 15
Climate Controls . . . . . . . . . . . . . . . 16
Transmission . . . . . . . . . . . . . . . . . . 17
Vehicle Features
Infotainment System . . . . . . . . . . . 18
Steering Wheel Controls . . . . . . . 18
Cruise Control . . . . . . . . . . . . . . . . . 19
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . 19
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . . 20
Forward Automatic Braking (FAB) . . . . . . . . . . . . . . . . 20
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . 20
Lane Keep Assist (LKA) . . . . . . . 20
Lane Change Alert (LCA) . . . . . . 20
Rear Vision Camera (RVC) . . . . 21
Rear Cross Traffic Alert (RCTA) System . . . . . . . . . . . . . . . . . . . . . . . 21
Parking Assist . . . . . . . . . . . . . . . . . 21
Automatic Parking Assist (APA) . . . . . . . . . . . . . . . . . . 21
Power Outlets . . . . . . . . . . . . . . . . . 21
Universal Remote System . . . . . 22
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 22
eAssist Features
eAssist Overview . . . . . . . . . . . . . . 23
High Voltage Safety Information . . . . . . . . . . . . . . . . . . . 24
Automatic Engine Stop/Start Feature . . . . . . . . . . . . . . . . . . . . . . . 24 Regenerative Braking . . . . . . . . . . 24
Battery . . . . . . . . . . . . . . . . . . . . . . . . . 24
Service . . . . . . . . . . . . . . . . . . . . . . . . 24
Performance and Maintenance
Traction Control/Electronic
Stability Control . . . . . . . . . . . . . . 25
Tire Pressure Monitor . . . . . . . . . . 25
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
E85 or FlexFuel . . . . . . . . . . . . . . . . 26
Engine Oil Life System . . . . . . . . 26
Driving for Better Fuel Economy . . . . . . . . . . . . . . . . . . . . . 26
Roadside Assistance Program . . . . . . . . . . . . . . . . . . . . . . 27

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
In Brief 7
1.Air Vents 0162.
2. Exterior Lamp Controls 0149.
Fog Lamps 0152.
Instrument Panel Illumination
Control 0153.
3. Turn and Lane-Change Signals
0152.
4. Tap Shift Controls (If Equipped). See Manual Mode
0 191.
5. Instrument Cluster 0114.
Driver Information Center (DIC)
Display. See Driver Information
Center (DIC) 0131.
6. Windshield Wiper/Washer
0107.
7. Hazard Warning Flashers
0151.
8. Light Sensor. See Automatic
Headlamp System 0150.
9. Infotainment 0156.
10. Dual Automatic Climate Control
System 0157. 11.
Traction Control/Electronic
Stability Control 0196.
Park Assist Button (If
Equipped). See Driver
Assistance Systems 0208.
SPORT Button (If Equipped).
See Selective Ride Control
0 198.
Lane Keep Assist (LKA) 0222
(If Equipped).
Automatic Parking Assist
Button (If Equipped). See
Driver Assistance Systems
0 208.
12. Shift Lever. See Automatic
Transmission 0187.
13. ENGINE START/STOP Button (Out of View). See Ignition
Positions 0176.
14. Steering Wheel Controls. See the infotainment manual.
Driver Information Center (DIC)
Controls. See Driver
Information Center (DIC) 0131.
15. Horn 0107. 16.
Steering Wheel Adjustment
0106 (Out of View).
17. Cruise Control 0199 (If
Equipped).
Adaptive Cruise Control 0201
(If Equipped).
Forward Collision Alert (FCA)
System 0214 (If Equipped).
Heated Steering Wheel 0106
(If Equipped).
18. Head-Up Display (HUD) 0134
(If Equipped).
19. Hood Release (Out of View). SeeHood 0237.
20. Front Storage.
21. Data Link Connector (DLC) (Out of View). See Malfunction
Indicator Lamp (Check Engine
Light) 0122.
22. Electric Parking Brake 0193.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
In Brief 17
Climate Control Display
1. Outside Temperature Display
2. Driver and Passenger Temperature Controls
3. Fan Control
4. Sync (Synchronized Temperature)
5. A/C (Air Conditioning)
6. Climate Control Selection (Application Tray Button)
7. Air Delivery Mode Control
See Dual Automatic Climate Control
System 0157.
Transmission
Electronic Precision Shift
This vehicle is equipped with an
electronic transmission. It is
designed to prevent shifting out of
P (Park), unless the ignition is on,
the brake pedal is applied, and the
shift lock release button is pressed.
The shift pattern is displayed on the
top of the shift lever. The selected
gear position will illuminate red on
the shift lever.
After releasing the shift lever, it will
return to the center position. Shifting from P (Park) to
R (Reverse)
1. With your foot on the brake
pedal, press and hold the shift
lock release button.
2. Push the shift lever forward, then left toward R (Reverse).
Shifting from P (Park) to D (Drive) 1. With your foot on the brake pedal, press and hold the shift
lock release button.
2. Pull the shift lever back toward D (Drive).

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
18 In Brief
Shifting into P (Park)1. Press the brake pedal and come to a complete stop.
2. Press the P button on the shiftlever.
Shifting from D (Drive) to M
(Manual) 1. While in D (Drive), pull the shift lever back to M (Manual).
2. Pull the shift lever back again to return to D (Drive).
See Automatic Transmission 0187.
Tap Shift
If equipped, Tap Shift allows you to
shift an automatic transmission
similar to a manual transmission. To
use the Tap Shift feature:
1. When in D (Drive), pull back on the shift lever to enter
M (Manual Mode).
2. Use the tap shift paddles located on the steering wheel
to manually shift the automatic
transmission.
3. To exit, pull back on the shift lever to go from M (Manual
Mode) back to D (Drive).
See Manual Mode 0191.
Vehicle Features
Infotainment System
See the infotainment manual for
information on the radio, audio
players, phone, navigation system,
and voice or speech recognition.
It also includes information on
settings.
Steering Wheel Controls
The infotainment system can be
operated by using the steering
wheel controls. See “Steering Wheel
Controls” in the infotainment
manual.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
24 In Brief
The eAssist system uses a high
voltage battery, which is cooled with
air drawn from the vehicle interior.
The cold air intake for the battery is
under the leading edge of the rear
seat. The exhaust for warm air is in
the trunk. Do not cover the intake or
exhaust. SeeBattery - North
America 0255.
High Voltage Safety
Information
Vehicles with eAssist have a
standard 12-volt battery and 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.
In emergency situations, first
responders can cut the two clearly
labeled cut points in the engine
compartment to disable the high
voltage battery and airbag systems.
Do not cut the high voltage cable.
Automatic Engine Stop/
Start Feature
Vehicles with eAssist have an
automatic engine Stop/Start feature.
After the engine is started and has
reached operating temperature, this
feature may cause Auto Stop which
will turn the engine off when the
brake pedal is applied and the
vehicle comes to a complete stop.
When the brake pedal is released,
or the accelerator pedal is applied,
the engine will restart. The engine
will continue to run until the next
Auto Stop.
AUTO STOP on the tachometer
signifies that the engine is in Auto
Stop mode. See Tachometer0116.
Remember to put the transmission
in P (Park) and turn the ignition off
before exiting the vehicle.
See Starting the Engine 0177.
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 America
0255.
Service
Never try to do your own service on
eAssist components. You can be
injured and the vehicle can be

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
40 Keys, Doors, and Windows
To unlock the doors:
.Press
Kon the power door lock
switch.
. Shift the transmission into
P (Park).
Automatic door locking cannot be
disabled. Automatic door unlocking
can be programmed. See Vehicle
Personalization 0138.
Lockout Protection
When locking is requested with the
driver door open and the ignition is
on or in ACC/ACCESSORY, all the
doors will lock and then the driver
door will unlock.
If the vehicle is off and locking is
requested while a door is open,
when all doors are closed the
vehicle will check for RKE
transmitters inside. If an RKE
transmitter is detected and the
number of RKE transmitters inside
has not reduced, the driver door will
unlock and the horn will sound three
times. This can be manually overridden by
pressing and holding
Qon the
power door lock switch for at least
four seconds.
Unlocked Door Anti-Lockout
Unlocked Door Anti-Lockout, when
on, will unlock the driver door if
locking is requested while the driver
door is open. This feature can be
turned on or off using the vehicle
personalization menus. See Vehicle
Personalization 0138.
Safety Locks
The rear door safety locks prevent
passengers from opening the rear
doors from inside the vehicle.
Manual Safety Locks
If equipped, the safety lock is on the
inside edge of the rear doors. To
use the safety lock:
1. Move the lever down to the lock position.
2. Close the door.
3. Do the same for the other rear door.
To open a rear door when the safety
lock is on:
1. Unlock the door by activating the inside handle, by pressing
the power door lock switch,

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
Lighting 151
There is a light sensor on top of the
instrument panel. Do not cover the
sensor; otherwise the headlamps
will come on when they are not
needed.
The system may also turn on the
headlamps when driving through a
parking garage or tunnel.
When it is bright enough outside,
the headlamps will turn off or may
change to Daytime Running
Lamps (DRL).
The automatic headlamp system
turns off when the exterior lamp
control is turned to
Oor the ignition
is off.
Adaptive Forward
Lighting (AFL)
If equipped, the AFL pivots the
headlamps horizontally to provide
greater road illumination while
turning. To enable AFL, set the
exterior lamp control to the AUTO
position. Moving the switch out of
the AUTO position deactivates the
system. AFL operates when the
vehicle speed is greater than 3 km/h
(2 mph). AFL does not operate
when the transmission is in
R (Reverse). AFL is not immediately
operable after starting the vehicle;
driving a short distance is required
to calibrate the AFL. See Exterior
Lamp Controls 0149.
Hazard Warning Flashers
|:Press to make the front and
rear turn signal lamps flash on and
off. Press again to turn the
flashers off.
The hazard warning flashers turn on
automatically if the airbags deploy.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
164 Driving and Operating
Driving and
Operating
Driving Information
Distracted Driving . . . . . . . . . . . . 165
Defensive Driving . . . . . . . . . . . . . 166
Drunk Driving . . . . . . . . . . . . . . . . . 166
Control of a Vehicle . . . . . . . . . . . 166
Braking . . . . . . . . . . . . . . . . . . . . . . . 166
Steering . . . . . . . . . . . . . . . . . . . . . . 167
Off-Road Recovery . . . . . . . . . . . 168
Loss of Control . . . . . . . . . . . . . . . 168
Driving on Wet Roads . . . . . . . . 169
Hill and Mountain Roads . . . . . 169
Winter Driving . . . . . . . . . . . . . . . . 170
If the Vehicle Is Stuck . . . . . . . . 171
Vehicle Load Limits . . . . . . . . . . . 172
Starting and Operating
New Vehicle Break-In . . . . . . . . . 175
Ignition Positions . . . . . . . . . . . . . 176
Starting the Engine . . . . . . . . . . . 177
Stop/Start System (WithouteAssist) . . . . . . . . . . . . . . . . . . . . . 178
Stop/Start System (With eAssist) . . . . . . . . . . . . . . . . . . . . . 179
Engine Heater . . . . . . . . . . . . . . . . 180 Retained Accessory
Power (RAP) . . . . . . . . . . . . . . . . 181
Shifting Into Park . . . . . . . . . . . . . 182
Shifting out of Park . . . . . . . . . . . 182
Parking over Things That Burn . . . . . . . . . . . . . . . . . . . 185
Active Fuel Management . . . . . 185
Extended Parking . . . . . . . . . . . . 185
Engine Exhaust
Engine Exhaust . . . . . . . . . . . . . . 186
Running the Vehicle While Parked . . . . . . . . . . . . . . . . . . . . . . 186
Automatic Transmission
Automatic Transmission . . . . . . 187
Manual Mode . . . . . . . . . . . . . . . . . 191
Drive Systems
All-Wheel Drive . . . . . . . . . . . . . . . 192
Brakes
Antilock BrakeSystem (ABS) . . . . . . . . . . . . . . . 193
Electric Parking Brake . . . . . . . . 193
Brake Assist . . . . . . . . . . . . . . . . . . 195
Hill Start Assist (HSA) . . . . . . . . 195
Regenerative Braking (eAssist) . . . . . . . . . . . . . . . . . . . . 196
Ride Control Systems
Traction Control/ElectronicStability Control . . . . . . . . . . . . . 196
Selective Ride Control . . . . . . . . 198
Cruise Control
Cruise Control . . . . . . . . . . . . . . . . 199
Adaptive Cruise Control . . . . . . 201
Driver Assistance Systems
Driver Assistance Systems . . . 208
Assistance Systems for Parking or Backing . . . . . . . . . . 210
Assistance Systems for Driving . . . . . . . . . . . . . . . . . . . . . . 214
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . 214
Forward Automatic Braking (FAB) . . . . . . . . . . . . . . . 216
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . 218
Side Blind Zone Alert (SBZA) . . . . . . . . . . . . . . . . 220
Lane Change Alert (LCA) . . . . . 220
Lane Departure Warning (LDW) . . . . . . . . . . . . . 222
Lane Keep Assist (LKA) . . . . . . 222
Fuel
Top Tier Fuel . . . . . . . . . . . . . . . . . 224
Recommended Fuel . . . . . . . . . . 224

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
178 Driving and Operating
To start the vehicle:1. With the Keyless Access system, the Remote Keyless
Entry (RKE) transmitter must
be in the vehicle. Press
ENGINE START/STOP with the
brake pedal applied. When the
engine begins cranking, let go
of the button. The idle speed
will go down as the engine
warms up. Do not race the
engine immediately after
starting it.
If the RKE transmitter is not in
the vehicle, if there is
interference, or if the RKE
battery is low, a Driver
Information Center (DIC)
message will display. See
Remote Keyless Entry (RKE)
System Operation 029.
Caution
Cranking the engine for long
periods of time, by pressing
ENGINE START/STOP
(Continued)
Caution (Continued)
immediately after cranking has
ended, can overheat and damage
the cranking motor, and drain the
battery. Wait at least 15 seconds
between each try, to let the
cranking motor cool down.
2. If the engine does not start after five to 10 seconds,
especially in very cold weather
(below −18 °C or 0 °F), it could
be flooded with too much
gasoline. Try pushing the
accelerator pedal all the way to
the floor and hold it there, then
press ENGINE START/STOP
for up to a maximum of
15 seconds. Wait at least
15 seconds between each try,
to allow the cranking motor to
cool down. When the engine
starts, let go of the button and
the accelerator. If the vehicle
starts briefly but then stops
again, do the same thing. This
clears the extra gasoline from
the engine. Do not race the engine immediately after
starting it. Operate the engine
and transmission gently until
the oil warms up and lubricates
all moving parts.
Stop/Start System
(Without eAssist)
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.
{Warning
The automatic engine Stop/Start
feature causes the engine to shut
off while the vehicle is still on. Do
not exit the vehicle before shifting
to P (Park). The vehicle may
restart and move unexpectedly.
Always shift to P (Park), and then
turn the ignition off before exiting
the vehicle.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
Driving and Operating 179
Auto Engine Stop/Start
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.
To maintain vehicle performance,
other conditions may cause the
engine to automatically restart
before the brake pedal is released.
Auto Stops may not occur and/or
auto restarts may occur because:
. The climate control settings
require the engine to be running
to cool or heat the vehicle
interior.
. The vehicle battery charge
is low.
. The vehicle battery has recently
been disconnected.
. Minimum vehicle speed has not
been reached since the last
Auto Stop .
The accelerator pedal is
pressed.
. The engine or transmission is
not at the required operating
temperature.
. The outside temperature is not
in the required operating range.
. The vehicle is in any gear other
than D (Drive).
. Tow/Haul Mode or other driver
modes have been selected.
. The vehicle is on a steep hill or
grade.
. The driver door has been
opened or driver seat belt has
been unbuckled.
. The hood has been opened.
. The Auto Stop has reached the
maximum allowed time.Stop/Start System (With
eAssist)
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.
{Warning
The automatic engine Stop/Start
feature causes the engine to shut
off while the vehicle is still on. Do
not exit the vehicle before shifting
to P (Park). The vehicle may
restart and move unexpectedly.
Always shift to P (Park), and then
turn the ignition off before exiting
the vehicle.
Auto Engine Stop/Start
When the brakes are applied and
the vehicle is at a complete stop,
the engine may turn off. When
stopped, the tachometer displays