2012 GMC ACADIA sensor

Black plate (44,1)GMC Acadia/Acadia Denali Owner Manual - 2012
5-44 Instruments and Controls
The DIC also shows the tire
pressure values. SeeDriver
Information Center (DIC)
(Without DIC Buttons) on page 5‑30
or Driver Information Center (DIC)
(With DIC Buttons) on page 5‑25.
SERVICE TIRE MONITOR
SYSTEM
On vehicles with the Tire Pressure
Monitor System (TPMS), this
message displays if a part on the
TPMS is not working properly.
The tire pressure light also flashes
and then remains on during the
same ignition cycle. See Tire
Pressure Light on page 5‑23.
Several conditions may cause this
message to appear. See Tire
Pressure Monitor Operation on
page 10‑46 for more information.
If the warning comes on and stays
on, there may be a problem with
the TPMS. See your dealer.
TIRE LEARNING ACTIVE
This message displays when the
Tire Pressure Monitor System
(TPMS) is relearning the tire
positions on your vehicle. The tire
positions must be relearned after
rotating the tires or after replacing a
tire or sensor. See Tire Rotation on
page 10‑50, Tire Pressure Monitor
System on page 10‑45, and Tire
Pressure on page 10‑44 for more
information.
Transmission Messages
ALL WHEEL DRIVE OFF
If your vehicle has the All-Wheel
Drive (AWD) system, this message
displays when there is a compact
spare tire on the vehicle, when the
Antilock Brake System (ABS)
warning light comes on, or when the
rear differential fluid is overheating.
This message turns off when the
differential fluid cools. The AWD system is disabled until
the compact spare tire is replaced
by a full-size tire. If the warning
message is still on after putting on
the full-size tire, you need to reset
the warning message. To reset the
warning message, turn the ignition
off and then back on again after
30 seconds. If the message stays
on, see your dealer right away.
See
All-Wheel Drive on page 9‑27
for more information.
SERVICE ALL WHEEL DRIVE
If your vehicle has the All-Wheel
Drive (AWD) system, this message
displays if there is a problem
with this system. If this message
appears, stop as soon as possible
and turn off the vehicle. Restart the
vehicle after 30 seconds and check
for the message on the DIC display.
If the message is still displayed or
appears again when you begin
driving, the AWD system needs
service. See your dealer.

Black plate (3,1)GMC Acadia/Acadia Denali Owner Manual - 2012
Lighting 6-3
Daytime Running
Lamps (DRL)/Automatic
Headlamp System
Daytime Running Lamps (DRL) can
make it easier for others to see the
front of your vehicle during the day.
Fully functional daytime running
lamps are required on all vehicles
first sold in Canada.
The DRL system makes the
low-beam headlamps come on at a
reduced brightness when the
following conditions are met:
.The ignition is in the ON/RUN
position.
.The exterior lamps control is
in AUTO.
.The engine is running.When the DRL are on, the regular
headlamps, taillamps, sidemarker,
and other lamps will not be on.
The instrument panel and cluster
will also not be lit.
The headlamps automatically
change from DRL to the regular
headlamps depending on the
darkness of the surroundings.
The other lamps that come on with
the headlamps will also come on.
When it is bright enough outside,
the headlamps will go off and the
DRL will come on.
The regular headlamp system
should be turned on when needed.
Do not cover the light sensor on top
of the instrument panel because it
works with the DRL.
Delayed Headlamps
Delayed headlamps provide a
period of exterior lighting as you
leave the area around the vehicle.
This feature is activated when
the headlamps are on due to the
automatic headlamps control
feature, and when the ignition is
turned off. The headlamps remain
on until the exterior lamps control is
moved to the parking lamps position
or until the pre-selected delayed
headlamp lighting period has ended.
If the ignition is turned off with the
exterior lamp control in the parking
lamps or headlamps position, the
delayed headlamps cycle will not
occur.
To disable the delayed headlamps
feature or change the time of
delay, see
Vehicle Personalization
(With DIC Buttons) on page 5‑46.

Black plate (9,1)GMC Acadia/Acadia Denali Owner Manual - 2012
Climate Controls 8-9
Sensors
The solar sensor, located in the
defrost grille in the middle of the
instrument panel, monitors the solar
heat. Do not cover the solar sensor
or the system will not work properly.The interior temperature sensor
located on the instrument panel to
the right of the steering column,
measures the temperature of the
air inside the vehicle.There is also an exterior
temperature sensor located behind
the front grille. This sensor reads
the outside air temperature and
helps maintain the temperature
inside the vehicle. Any cover on the
front of the vehicle could cause a
false reading in the displayed
temperature.
The climate control system uses the
information from these sensors to
maintain comfort settings by
adjusting the temperature, fan
speed, and air delivery mode.
The system may also supply cooler
air to the side of the vehicle facing
the sun. The recirculation mode will
also be used as needed to maintain
cool outlet temperatures.

Black plate (34,1)GMC Acadia/Acadia Denali Owner Manual - 2012
9-34 Driving and Operating
Object Detection
Systems
Ultrasonic Parking Assist
If available, the Ultrasonic Rear
Parking Assist (URPA) system
assists the driver with parking
and avoiding objects while in
R (Reverse). URPA operates at
speeds less than 8 km/h (5 mph).
The sensors on the rear bumper
are used to detect objects up to
2.5 m (8 ft) behind the vehicle, and
at least 25 cm (10 in) off the ground.
{WARNING
The URPA system does not
detect pedestrians, bicyclists,
animals, or any other objects
located below the bumper or that
are too close or too far from the(Continued)
WARNING (Continued)
vehicle. To prevent injury, death,
or vehicle damage, even with
URPA, always check behind the
vehicle and check all mirrors
before backing.
How the System Works
URPA comes on automatically
when the shift lever is moved into
R (Reverse). A single tone sounds
to indicate the system is working.
URPA operates only at speeds less
than 8 km/h (5 mph).
An obstacle is indicated by audible
beeps. The interval between the
beeps becomes shorter as the
vehicle gets closer to the obstacle.
When the distance is less than
30 cm (12 in) the beeping is a
continuous tone for five seconds. To be detected, objects must be at
least 25 cm (10 in) off the ground
and below liftgate level. Objects
must also be within 2.5 m (8 ft) from
the rear bumper. This distance may
be less during warmer or humid
weather.
Turning the System On and Off
The system can be disabled through
the Driver Information Center (DIC).
See
“Park Assist” underVehicle
Personalization (With DIC Buttons)
on page 5‑46 for more information.
URPA defaults to the on setting
each time the vehicle is started.
When the System Does Not
Seem to Work Properly
The following messages may be
displayed on the DIC:
SERVICE PARK ASSIST: If this
message occurs, take the vehicle to
your dealer to repair the system.

Black plate (35,1)GMC Acadia/Acadia Denali Owner Manual - 2012
Driving and Operating 9-35
PARK ASST BLOCKED SEE
OWNERS MANUAL:This
message 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 10‑86.
.The park assist sensors are
covered by frost or ice. Frost or
ice can form around and behind
the sensors and may not always
be seen; this can occur after
washing the vehicle in cold
weather. The message may not
clear until the frost or ice has
melted.
.A trailer was attached to the
vehicle, or an object was
hanging out of the liftgate during
the last drive cycle. Once the
object is removed, URPA will
return to normal operation.
.A tow bar is attached to the
vehicle.
.The bumper is damaged.
Take the vehicle to your dealer
to repair the system.
.Other conditions, such as
vibrations from a jackhammer or
the compression of air brakes on
a very large truck, are affecting
system performance.
Rear Vision
Camera (RVC)
The vehicle may have a rear vision
camera system. Read this entire
section before using it.
{WARNING
The RVC system does not display
pedestrians, bicyclists, animals,
or any other object located
outside the camera's field of view,
below the bumper, or under the
vehicle.
(Continued)
WARNING (Continued)
Do not back the vehicle using
only the RVC screen or by
using the screen during longer,
higher speed backing maneuvers,
or where there could be
cross-traffic. Perceived distances
may be different from actual
distances.
Failure to use proper care before
backing may result in injury,
death, or vehicle damage. Always
check before backing by checking
behind and around the vehicle.
Vehicles without Navigation
System
The rear vision camera system is
designed to help the driver when
backing up by displaying a view
of the area behind the vehicle.

Black plate (13,1)GMC Acadia/Acadia Denali Owner Manual - 2012
Vehicle Care 10-13
To inspect or replace the engine air
cleaner/filter, do the following:
1. Remove the engine cover.See Engine Cover on page 10‑8.
A. Ventilation Tube
B. Sensor
2. Disconnect the cover fitting from the ventilation tube (A).
3. Disconnect the wiring harness connector from the sensor (B).
A. Clamp
B. Screws
C. Housing Cover
D. Filter
E. Base
4. Loosen the outlet duct clamp (A).
5. Loosen the six housing cover (C) screws (B).
6. Remove the housing cover (C) with outlet duct.
7. Remove the filter (D) and any loose debris that may be found
in the base (E). 8. Inspect or replace the filter (D).
9. Reverse Steps 2 through 6 to
reinstall the housing cover
and reconnect the electrical
connector to the sensor.
10. Reinstall the engine cover. SeeEngine Cover on
page 10‑8.
{WARNING
Operating the engine with the air
cleaner/filter off can cause you
or others to be burned. The air
cleaner not only cleans the air; it
helps to stop flames if the engine
backfires. Use caution when
working on the engine and do not
drive with the air cleaner/filter off.
Notice: If the air cleaner/filter is
off, dirt can easily get into the
engine, which could damage it.
Always have the air cleaner/filter
in place when you are driving.

Black plate (33,1)GMC Acadia/Acadia Denali Owner Manual - 2012
Vehicle Care 10-33
FusesUsage
ECM 1 Engine Control
Module 1
EMISSION 1 Emission 1
EMISSION 2 Emission 2
EVEN COILS Even Injector Coils
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
FOG LAMP Fog Lamps
FSCM Fuel System
Control Module
HORN Horn
HTD MIR Heated Outside
Rearview Mirror
HUMIDITY/ MAF Humidity Sensor/
MAF Sensor
HVAC BLWR Heating,
Ventilation, and
Air Conditioning
Blower Fuses
Usage
LT HI BEAM Left High-Beam
Headlamp
LT LO BEAM Left Low‐Beam
Headlamp
LT PRK Left Parking Lamp
LT TRLR
STOP/TRN Trailer Left
Stoplamp and
Turn Signal
ODD COILS Odd Injector Coils
PCM IGN Powertrain Control
Module Ignition
PWR L/GATE Power Liftgate PWR
OUTLET Power Outlet
REAR
CAMERA Rear Vision
Camera
RR APO Rear Accessory
Power Outlet
RR DEFOG Rear Defogger Fuses
Usage
RR HVAC Rear Climate
Control System
RT HI BEAM Right High‐Beam
Headlamp
RT LO BEAM Right Low‐Beam
Headlamp
RT PRK Right
Parking Lamp
RT TRLR
STOP/TRN Trailer Right
Stoplamp and
Turn Signal
RVC SNSR Regulated Voltage
Control Sensor
S/ROOF/
SUNSHADE Sunroof
SERVICE Service Repair SPARE SpareSTOP
LAMPS
(China Only) Stoplamps
(China Only)

Black plate (45,1)GMC Acadia/Acadia Denali Owner Manual - 2012
Vehicle Care 10-45
the vehicle has not been driven
for at least three hours or no
more than 1.6 km (1 mi).
Remove the valve cap from the
tire valve stem. Press the tire
gauge firmly onto the valve to
get a pressure measurement.
If the cold tire inflation pressure
matches the recommended
pressure on the Tire and
Loading Information label, no
further adjustment is necessary.
If the inflation pressure is low,
add air until the recommended
pressure is reached. If the
inflation pressure is high, press
on the metal stem in the center
of the tire valve to release air.
Recheck the tire pressure with
the tire gauge.
Return the valve caps on the
valve stems to prevent leaks
and keep out dirt and moisture.Tire Pressure Monitor
System
The Tire Pressure Monitor System
(TPMS) uses radio and sensor
technology to check tire pressure
levels. The TPMS sensors monitor
the air pressure in your tires and
transmit tire pressure readings to a
receiver located in the vehicle.
Each tire, including the spare
(if provided), should be checked
monthly when cold and inflated to
the inflation pressure recommended
by the vehicle manufacturer on the
vehicle placard or tire inflation
pressure label. (If your vehicle has
tires of a different size than the size
indicated on the vehicle placard or
tire inflation pressure label, you
should determine the proper tire
inflation pressure for those tires.)
As an added safety feature, your
vehicle has been equipped with a
tire pressure monitoring system
(TPMS) that illuminates a low tirepressure telltale when one or
more of your tires is significantly
under‐inflated.
Accordingly, when the low tire
pressure telltale illuminates, you
should stop and check your tires as
soon as possible, and inflate them
to the proper pressure. Driving on a
significantly under‐inflated tire
causes the tire to overheat and can
lead to tire failure. Under‐inflation
also reduces fuel efficiency and tire
tread life, and may affect the
vehicle's handling and stopping
ability.
Please note that the TPMS is
not a substitute for proper tire
maintenance, and it is the driver's
responsibility to maintain correct tire
pressure, even if under‐inflation has
not reached the level to trigger
illumination of the TPMS low tire
pressure telltale.