2010 BUICK LACROSSE display

8-32 Driving and Operating
Parking Brake
The vehicle has an Electric Parking
Brake (EPB). The switch for the
EPB is in the center console. The
EPB can always be activated, even
if the ignition is OFF. To prevent
draining the battery, avoid repeated
cycles of the EPB system when the
engine is not running.The system has a Park Brake
Status light and a Park Brake
Warning light. See
Electric Parking
Brake Light
on page 4‑20. There
are also three Driver Information
Center (DIC) messages. See Brake
System Messages
on page 4‑33for more information. In case of
insufficient electrical power, the EPB
cannot be applied or released.
Before leaving the vehicle, check
the park brake status lamp to insure
the park brake is applied.
EPB Apply
The EPB can be applied any time
the vehicle is stopped. The EPB is
applied by momentarily lifting up on
the EPB switch. Once fully applied,
the park brake status light will be
on. While the brake is being applied,
the status lamp will flash until full apply is reached. If the light does
not come on, or remains flashing,
you need to have the vehicle
serviced. Do not drive the vehicle if
the park brake status light is
flashing. See your dealer/retailer.
See
Electric Parking Brake Light
on
page 4‑20for more information.
If the EPB is applied while the
vehicle is in motion, a chime will
sound, and the DIC message
RELEASE PARK BRAKE SWITCH
will be displayed. The vehicle will
decelerate as long as the switch is
held in the up position. Releasing
the EPB switch during the
deceleration will release the parking
brake. If the switch is held in the up
position until the vehicle comes to a
stop, the EPB will remain applied.

Driving and Operating 8-33
If the park brake status light flashes
continuously, the EPB is only
partially applied or released,
or there is a problem with the EPB.
The DIC message SERVICE PARK
BRAKE will be displayed. If this light
flashes continuously, release the
EPB, and attempt to apply it again.
If this light continues to flash, do not
drive the vehicle. See your dealer/
retailer.
If the park brake warning light is on,
the EPB has detected an error in
another system and is operating
with reduced functionality. To apply
the EPB when this light is on, lift up
on the EPB switch and hold it in the
up position. Full application of the
parking brake by the EPB system
may take a longer period of time
than normal when this light is on.
Continue to hold the switch until the
park brake status light remains on.
If the park brake warning light is on,
see your dealer/retailer.
If the EPB fails to apply, the rear
wheels should be blocked to
prevent vehicle movement.EPB Release
To release the EPB, place the
ignition in the ON/RUN position,
apply and hold the brake pedal, and
push down momentarily on the EPB
switch. If you attempt to release the
EPB without the brake pedal
applied, a chime will sound, and the
DIC message PRESS BRAKE
PEDAL TO RELEASE PARK
BRAKE will be displayed. The EPB
is released when the park brake
status light is off.
If the park brake warning light is on,
the EPB has detected an error in
another system and is operating
with reduced functionality. To
release the EPB when this light is
on, push down on the EPB switch
and hold it in the down position.
EPB release may take a longer
period of time than normal when this
light is on. Continue to hold the
switch until the park brake status
light is off. If the light is on, see your
dealer/retailer.Notice:
Driving with the parking
brake on can overheat the brake
system and cause premature
wear or damage to brake system
parts. Make sure that the parking
brake is fully released and the
brake warning light is off before
driving.
Automatic EPB Release
The EPB will automatically release if
the vehicle is running, placed into
gear and an attempt is made to
drive away. Avoid rapid acceleration
when the EPB is applied, to
preserve park brake lining life.
For maximum EPB force when
towing a trailer or parking on a hill,
pull the EPB switch twice. If you are
towing a trailer and parking on a hill,
see Driving Characteristics and
Towing Tips
on page 8‑54for more
information.

Driving and Operating 8-41
{WARNING
The Ultrasonic Rear Parking
Assist (URPA) system does not
replace driver vision. It cannot
detect:
.objects that are below the
bumper, underneath the
vehicle, or if they are too
close or far from the vehicle
.children, pedestrians,
bicyclists, or pets.
If you do not use proper care
before and while backing; vehicle
damage, injury, or death could
occur. Even with URPA, always
check behind the vehicle before
backing up. While backing, be
sure to look for objects and check
the vehicle's mirrors. The display is located in the
headliner.
URPA uses three color-coded lights
to provide distance and system
information.
How the System Works
URPA comes on automatically and
the display briefly illuminates to
indicate the system is working when
the shift lever is moved into
R (Reverse). If the vehicle is traveling faster then
8 km/h (5 mph) in reverse, the red
light on the rear display flashes.
Objects must be at least 20 cm
(8 in.) off the ground, below liftgate
level, and within 2.5 m (8 ft.) from
the rear bumper to be detected. The
distance may be less during warmer
or humid weather.
A single beep sounds the first time
an object is detected between 0.6 m
(23 in.) and 2.5 m (8 ft.) away.
Beeping occurs continuously when
the vehicle is 0.6 m (23 in.) or closer
to an object.

8-42 Driving and Operating
The following describes how the URPA display lights appear as the vehicle
gets closer to a detected object:Description Metric Englishamber light 2.5 m 8 ft.
amber/amber lights 1.0 m 40 in.
amber/amber/red lights and continuous beeping for five seconds 0.6 m 23 in.
amber/amber/red lights flashing and continuous beeping for five seconds 0.3 m 1 ft.
PARK ASSIST OFF displays on the
Driver Information Center (DIC) to
indicate that URPA is off, see Driver
Information Center (DIC)
on
page 4‑25for more information.
Turning the System On and Off
The URPA system can be turned on
and off using the park assist button
located next to the shift lever.
The park assist button lights up
when the system is on and turns off
when it has been disabled.
URPA defaults to the on setting
each time the vehicle is started.
When the System Does Not
Seem to Work Properly
If the URPA system does not
activate due to a temporary
condition, the message PARK
ASSIST OFF displays on the DIC
and a red light is shown on the rear
URPA display when the shift lever is
moved into R (Reverse). This can
occur under the following
conditions:
.The ultrasonic sensors are not
clean. Keep the vehicle's rear
bumper free of mud, dirt, snow,
ice and slush. For cleaning
instructions, see Exterior Care
on page 9‑82.
.A trailer was attached to the
vehicle, or an object was
hanging out of the trunk during
the last drive cycle, a red light
may come on in the rear display.
Once the attached object is
removed, URPA will return to
normal operation.

Driving and Operating 8-43
.A tow bar is attached to the
vehicle.
.The vehicle's bumper is
damaged. Take the vehicle to
your dealer/retailer to repair the
system.
.Other conditions may affect
system performance, such as
vibrations from a jackhammer or
the compression of air brakes on
a very large truck.
If the system is still disabled, after
driving forward at least 25 km/h
(15 mph), take the vehicle to your
dealer/retailer.
Side Blind Zone
Alert (SBZA)
The vehicle may have a Side Blind
Zone Alert (SBZA) system. Read
this entire section before using the
system.
{WARNING
SBZA is only a lane changing aid
and does not replace driver
vision. SBZA does not detect:
.Vehicles outside the side
blind zones which may be
rapidly approaching.
.Pedestrians, bicyclists,
or animals. (Continued)
WARNING (Continued)
Failure to use proper care when
changing lanes may result in
damage to the vehicle, injury,
or death. Always check the
outside and rearview mirrors,
glance over your shoulder, and
use the turn signal before
changing lanes.
When the system detects a vehicle
in the side blind zone, amber SBZA
displays will light up in the side
mirrors. This indicates that it may be
unsafe to change lanes. Before
making a lane change, always
check the SBZA display, check the
outside and rearview mirrors, look
over your shoulder for vehicles and
hazards, and use the turn signal.

8-44 Driving and Operating
SBZA Detection Zones
The SBZA sensor covers a zone
of approximately one lane over
from both sides of the vehicle,
3.5 m (11 ft.). This zone starts at
each side mirror and goes back
approximately 5.0 m (16 ft.). The
height of the zone is approximately
between 0.5 m (1.5 ft.) and
2.0 m (6 ft.) off the ground.
The SBZA detection zones do not
change if the vehicle is towing a
trailer. So be extra careful when
changing lanes while towing a
trailer.How the System Works
Left Side Mirror
DisplayRight Side Mirror Display
When the vehicle is started, both
outside mirror displays will briefly
come on to indicate that the system
is operating. While driving forward,
the left or right side mirror SBZA
display will light up if a vehicle is
detected in that blind zone. If you
activate a turn signal and a vehicle
has been detected on the same
side, the SBZA display will flash to
give you extra warning not to
change lanes. SBZA displays do not come on
while the vehicle is approaching or
passing other vehicles. At speeds
greater than 32 km/h (20 mph),
SBZA displays may come on when
a vehicle you have passed remains
in or drops back into the
detection zone.
SBZA can be disabled through
Vehicle Personalization. See
Vehicle Personalization
on
page 4‑38for more information.
If the SBZA is disabled by the
driver, the SBZA mirror displays will
not light up during normal driving.

Driving and Operating 8-45
When the System Does Not Seem
To Work Properly
Occasional missed alerts can occur
under normal circumstances and will
increase in wet conditions. The
system does not need to be
serviced due to an occasional
missed alert. The number of missed
alerts will increase with increased
rainfall or road spray.
If the SBZA displays do not light up
when the system is on and vehicles
are in the blind zone, the system
may need service. Take the vehicle
to your dealer/retailer.
SBZA is designed to ignore
stationary objects; however, the
system may occasionally light up
due to guard rails, signs, trees,
shrubs, and other stationary objects.
This is normal system operation, the
vehicle does not need service.SBZA does not operate when the
left or right corners of the rear
bumper are covered with mud, dirt,
snow, ice, slush, or in heavy
rainstorms. For cleaning
instructions, see
Exterior Care
on
page 9‑82. If the infotainment
display still shows the SIDE BLIND
ZONE SYS. UNAVAILABLE
message after cleaning the bumper,
see your dealer/retailer.
The SBZA displays may remain on
if a trailer is attached to the vehicle,
or a bicycle or object is extending
out to either side of the vehicle.
When SBZA is disabled for any
reason other than the driver turning
it off, the driver will not be able to
turn SBZA back on using Vehicle
Personalization. The SIDE BLIND
ZONE ALERT ON option will not be
selectable if the conditions for
normal system operation are not
met. Until normal operating
conditions for SBZA are met, you
should not rely upon SBZA while
driving. SBZA Error Messages
The following messages may
appear on the infotainment display:
SIDE BLIND ZONE ALERT
SYSTEM OFF:
This message
indicates that the driver has turned
the system off.
SIDE BLIND ZONE SYS.
UNAVAILABLE: This message
indicates that the SBZA system is
disabled because the sensor is
blocked and cannot detect vehicles
in the blind zone. The sensor may
be blocked by mud, dirt, snow, ice,
slush, or even heavy rainstorms.
This message may also activate
during heavy rain or due to road
spray. The vehicle does not need
service. For cleaning, see Exterior
Care on page 9‑82.

8-46 Driving and Operating
SERVICE SIDE BLIND ZONE
ALERT SYSTEM:If this message
appears, both SBZA displays will
remain on indicating there is a
problem with the SBZA system.
If these displays remain on after
continued driving, the system needs
service. Take the vehicle to your
dealer/retailer.
FCC Information
See Radio Frequency Statement
(US, Can)on page 12‑16for FCC
information.
Rear Vision
Camera (RVC)
This vehicle may have an RVC
system. Read this entire section
before using it.
The RVC system can assist
the driver when backing up by
displaying a view of the area
behind the vehicle.
{WARNING
The Rear Vision Camera (RVC)
system does not replace driver
vision. RVC does not:
.Detect objects that are
outside the camera's field of
view, below the bumper,
or underneath the vehicle.
.Detect children, pedestrians,
bicyclists, or pets.
Do not back the vehicle by only
looking at the RVC screen, or use
the screen during longer, higher
speed backing maneuvers or
where there could be cross-traffic.
Your judged distances using the
screen will differ from actual
distances. (Continued)
WARNING (Continued)
So if you do not use proper care
before backing up, you could hit a
vehicle, child, pedestrian,
bicyclist, or pet, resulting in
vehicle damage, injury, or death.
Even though the vehicle has the
RVC system, always check
carefully before backing up by
checking behind and around the
vehicle.
An image appears on the navigation
screen with the message Check
Surroundings for Safety when the
vehicle is shifted into R (Reverse).
The navigation screen goes to the
previous screen after approximately
10 seconds once the vehicle is
shifted out of R (Reverse).