Page 10 of 407

Black plate (3,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
In Brief 1-3
1.Exterior Lamp Controls on
page 6-1.
Fog Lamps on page 6-4 (If
Equipped).
Instrument Panel Illumination
Control on page 6-5.
Head-Up Display (HUD) on
page 5-31 (If Equipped).
2. Air Vents on page 8-6.
3. Turn Signal Lever. See Turn and
Lane-Change Signals on
page 6-4.
4. Instrument Cluster on page 5-8.
Driver Information Center
Display. See Driver Information
Center (DIC) on page 5-28.
5. Windshield Wiper/Washer on
page 5-3. 6.
Hazard Warning Flashers on
page 6-4.
Lane Departure Warning (LDW)
on page 9-57 (If Equipped).
Rear Parking Assist Button (If
Equipped). See Assistance
Systems for Parking or Backing
on page 9-48.
7. Light Sensor. See Automatic
Headlamp System on page 6-3.
8. Infotainment on page 7-1.
9. Data Link Connector (DLC) (Out of View). See Malfunction
Indicator Lamp on page 5-16.
10. Front Storage on page 4-2.
11. Hood Release. See Hood on
page 10-5.
12. Cruise Control on page 9-37.
Forward Collision Alert (FCA)
System on page 9-50 (If
Equipped).
13. Steering Wheel Adjustment on
page 5-2.
14. Horn on page 5-3. 15.
Steering Wheel Controls on
page 5-2 (If Equipped).
Driver Information Center (DIC)
Buttons. See Driver Information
Center (DIC) on page 5-28.
16. Ignition Positions (Key Access)
on page 9-15 orIgnition
Positions (Keyless Access) on
page 9-16.
17. Heated and Ventilated Front
Seats on page 3-9 (If
Equipped).
18. Shift Lever. See Automatic
Transmission on page 9-27.
19. Parking Brake on page 9-31.
Traction Control/Electronic
Stability Control on page 9-34.
20. Dual Automatic Climate Control
System on page 8-1.
Page 46 of 407

Black plate (15,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
Keys, Doors, and Windows 2-15
There is an emergency trunk
release handle located inside the
trunk on the trunk latch. On some
vehicles, the release handle can be
accessed by folding the rear seat
center seatback. SeeRear Seats on
page 3-11. Pull the release handle
to open the trunk from the inside.
After use, return to the stored
position.
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, if equipped.
.With a door open, pressQ
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
Page 206 of 407

Black plate (21,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
Driving and Operating 9-21
AUTO STOP on the tachometer
signifies that the engine is in auto
stop mode. SeeTachometer on
page 5-11. When the vehicle is
turned off, the tachometer will move
to OFF. If the driver door is opened
while in auto stop mode, a chime
will sound.
To restart the engine during auto
stop, release the brake pedal or
press the accelerator pedal. The
engine starts immediately. The
vehicle continues to run until the
next stop.
There are several conditions that
may prevent an auto stop or cause
an auto start.
The Engine Will Remain
Running When:
.The engine, transmission,
or high voltage battery is not
warmed up yet.
.The outside temperature is less
than −20°C (−4°F).
.The air conditioning or defrost
system need the compressor to
maintain interior comfort. See
Dual Automatic Climate Control
System on page 8-1 When it is
very warm or humid, the system
may not be able to shut the
engine off while maintaining
interior comfort. To maximize
fuel economy, use the eco air
conditioning mode.
.The shift lever is in P (Park),
N (Neutral), R (Reverse),
or M (Manual Mode).
.The high voltage battery pack
charge is low.
.The hood is not fully closed.
.Brake pedal pressure is low.
.If the malfunction indicator lamp
is on, auto stop may be
prevented.
.High humidity is detected.
The Engine Will Restart When:
.The brake pedal is released.
.The accelerator pedal is applied.
.Shifting out of D (Drive) to any
other gear.
.The air conditioning or defrost
system need the compressor to
maintain interior comfort. See
Dual Automatic Climate Control
System on page 8-1. The
warmer it is outside, the shorter
the time before the engine is
restarted to provide interior
cooling. To maximize fuel
economy, use the eco air
conditioning mode.
.The climate control system is
turned from off to normal air
conditioning or defrost. See Dual
Automatic Climate Control
System on page 8-1.
.The engine is required to run for
either heater or climate control
performance. See Dual
Automatic Climate Control
System on page 8-1.
.The high voltage battery pack
charge is low and requires
recharging.
Page 258 of 407
Black plate (5,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
Vehicle Care 10-5
Hood
To open the hood:
1. Pull the interior hood releasehandle located to the left of the
steering column below the
instrument panel.
2. Go to the front of the vehicle andpush the secondary hood
release handle toward the driver
side of the vehicle.
3. Lift the hood. To close the hood:
1. Before closing the hood, be sure
all the filler caps are on properly.
2. Lower the hood 30 cm (12 in) above the vehicle and release it
so it fully latches. Check to
make sure the hood is closed
and repeat the process if
necessary.
Page 359 of 407

Black plate (12,1)Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7707475) - 2015 - CRC - 10/9/14
11-12 Service and Maintenance
Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
UsageFluid/Lubricant
Engine Oil Use only engine oil meeting the dexos1™ specification of the proper SAE
viscosity grade. Look for the dexos1 approved logo for GM approved
engine oil. See Engine Oil on page 10-11.
Engine Coolant 50/50 mixture of clean, drinkable water and use only DEX-COOL
®Coolant.
See Engine Coolant on page 10-19.
Hydraulic Brake System DOT 3 Hydraulic Brake Fluid (GM Part No. 19299818, in Canada 19299819).
Windshield Washer Automotive windshield washer fluid that meets regional freeze protection requirements.
Hydraulic Power Steering System (If Equipped) DEXRON
®-VI Automatic Transmission Fluid.
Automatic Transmission DEXRON
®-VI Automatic Transmission Fluid.
Hood Latch Assembly, Secondary Latch, Pivots, Spring Anchor, and Release Pawl Lubriplate Lubricant Aerosol (GM Part No. 89021668, in
Canada 89021674) or lubricant meeting requirements of NLGI #2,
Category LB or GC-LB.
Key Lock Cylinders, Hood and Door Hinges Multi-Purpose Lubricant, Superlube (GM Part No. 12346241, in
Canada 10953474).
Weatherstrip Conditioning Weatherstrip Lubricant (GM Part No. 3634770, in Canada 10953518) or Dielectric Silicone Grease (GM Part No. 12345579, in Canada 10953481).