2008 GMC ACADIA brake

Torque Lock
If you are parking on a hill and you do not shift your
transmission into PARK (P) properly, the weight of the
vehicle may put too much force on the parking pawl
in the transmission. You may nd it difficult to pull the
shift lever out of PARK (P). This is called torque lock. To
prevent torque lock, set the parking brake and then
shift into PARK (P) properly before you leave the driver’s
seat. To nd out how, seeShifting Into PARK (P) on
page 2-36.
When you are ready to drive, move the shift lever out of
PARK (P)beforeyou release the parking brake.
If torque lock does occur, you may need to have another
vehicle push your vehicle a little uphill to take some of
the pressure from the parking pawl in the transmission,
so you can pull the shift lever out of PARK (P).
Shifting Out of PARK (P)
This vehicle is equipped with an electronic shift lock
release system. The shift lock release is designed to:
Prevent ignition key removal unless the shift lever is
in PARK (P) with the shift lever button fully released,
and
Prevent movement of the shift lever out of
PARK (P), unless the ignition is in ON/RUN or
ACC/ACCESSORY and the regular brake pedal is
applied.The shift lock release is always functional except in the
case of an uncharged or low voltage (less than 9 volt)
battery.
If your vehicle has an uncharged battery or a battery
with low voltage, try charging or jump starting the
battery. SeeJump Starting on page 5-39for more
information.
To shift out of PARK (P) use the following:
1. Apply the brake pedal.
2. Then press the shift lever button.
3. Move the shift lever to the desired position.
If you still are unable to shift out of PARK (P):
1. Fully release the shift lever button.
2. While holding down the brake pedal, press the shift
lever button again.
3. Move the shift lever to the desired position.
If you still cannot move the shift lever from PARK (P),
consult your dealer/retailer or a professional towing
service.
2-37

Running the Engine While Parked
It is better not to park with the engine running. But if you
ever have to, here are some things to know.
{CAUTION:
Idling the engine with the climate control
system off could allow dangerous exhaust into
your vehicle. See the earlier caution under
Engine Exhaust on page 2-38.
Also, idling in a closed-in place can let deadly
carbon monoxide (CO) into your vehicle even if
the climate control fan is at the highest setting.
One place this can happen is a garage.
Exhaust — with CO — can come in easily.
NEVER park in a garage with the engine
running.
Another closed-in place can be a blizzard. See
Winter Driving on page 4-17.
{CAUTION:
It can be dangerous to get out of your vehicle
if the shift lever is not fully in PARK (P) with
the parking brake rmly set. Your vehicle can
roll. Do not leave your vehicle when the engine
is running unless you have to. If you have left
the engine running, the vehicle can move
suddenly. You or others could be injured. To
be sure your vehicle will not move, even when
you are on fairly level ground, always set the
parking brake and move the shift lever to
PARK (P).
Follow the proper steps to be sure your vehicle will not
move. SeeShifting Into PARK (P) on page 2-36.
If you are pulling a trailer, seeTowing a Trailer on
page 4-30.
2-39

When the System Does Not Seem to
Work Properly
The driver disables the system.
The parking brake pedal is depressed.
The ultrasonic sensors are not clean. Keep your
vehicle’s rear bumper free of mud, dirt, snow,
ice and slush. For cleaning instructions, see
Washing Your Vehicle on page 5-92.
A trailer was attached to your vehicle, or a bicycle
or an object was hanging out of your liftgate
during your last drive cycle, the red light may
illuminate in the rear display. Once the attached
object is removed, URPA will return to normal
operation.
A tow bar is attached to your 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 15 mph (25 km/h), take your vehicle to your
dealer/retailer.
Rear Vision Camera
Your vehicle may have a Rear Vision Camera system.
Read the entire section before using the system.
The rear vision camera system is designed to help the
driver when backing up. See “Rear Vision Camera”
in the Index of the navigation manual.
OnStar®System
OnStar uses several innovative technologies and live
advisors to provide you with a wide range of safety,
security, information, and convenience services. If your
airbags deploy, the system is designed to make an
automatic call to OnStar Emergency advisors who can
request emergency services be sent to your location.
If you lock your keys in the vehicle, call OnStar at
1-888-4-ONSTAR and they can send a signal to unlock
your doors. If you need roadside assistance, press
the OnStar button and they can contact Roadside
Service for you.
2-47

Instrument Panel Overview...............................3-4
Hazard Warning Flashers................................3-6
Other Warning Devices...................................3-6
Horn.............................................................3-6
Tilt and Telescopic Steering Wheel...................3-6
Power Tilt Wheel and Telescopic Steering
Column......................................................3-7
Turn Signal/Multifunction Lever.........................3-8
Turn and Lane-Change Signals........................3-8
Headlamp High/Low-Beam Changer..................3-9
Flash-to-Pass.................................................3-9
Windshield Wipers..........................................3-9
Windshield Washer.......................................3-10
Rear Window Wiper/Washer...........................3-11
Cruise Control..............................................3-12
Exterior Lamps.............................................3-14
Delayed Headlamps......................................3-15
Daytime Running Lamps (DRL)/
Automatic Headlamp System.......................3-16
Fog Lamps..................................................3-16
Instrument Panel Brightness...........................3-17
Courtesy Lamps...........................................3-17
Dome Lamps...............................................3-17
Dome Lamp Override....................................3-17
Entry Lighting...............................................3-17
Delayed Entry Lighting...................................3-18
Delayed Exit Lighting.....................................3-18Parade Dimming...........................................3-18
Reading Lamps............................................3-19
Electric Power Management...........................3-19
Battery Run-Down Protection..........................3-20
Head-Up Display (HUD).................................3-20
Accessory Power Outlet(s).............................3-24
Power Outlet 115 Volt Alternating Current........3-25
Climate Controls............................................3-26
Climate Control System.................................3-26
Dual Automatic Climate Control System...........3-29
Outlet Adjustment.........................................3-36
Rear Air Conditioning and
Heating System.........................................3-36
Rear Air Conditioning and Heating System and
Electronic Climate Controls.........................3-38
Warning Lights, Gages,
and Indicators.............................................3-39
Instrument Panel Cluster................................3-40
Speedometer and Odometer...........................3-41
Tachometer.................................................3-41
Safety Belt Reminders...................................3-41
Airbag Readiness Light..................................3-42
Passenger Airbag Status Indicator...................3-43
Charging System Light..................................3-45
Voltmeter Gage............................................3-46
Brake System Warning Light..........................3-47
Section 3 Instrument Panel
3-1

Antilock Brake System
Warning Light...........................................3-48
StabiliTrak
®Indicator Light..............................3-48
Engine Coolant Temperature Warning Light......3-49
Engine Coolant Temperature Gage..................3-49
Tire Pressure Light.......................................3-50
Malfunction Indicator Lamp.............................3-50
Oil Pressure Light.........................................3-54
Security Light...............................................3-54
Fog Lamp Light............................................3-55
Cruise Control Light......................................3-55
Highbeam On Light.......................................3-55
Tow/Haul Mode Light....................................3-55
Fuel Gage...................................................3-56
Driver Information Center (DIC).......................3-57
DIC Operation and Displays
(With DIC Buttons)....................................3-57
DIC Operation and Displays (Without DIC
Buttons)...................................................3-63DIC Warnings and Messages.........................3-66
DIC Vehicle Customization (With DIC Buttons). . . .3-75
Audio System(s).............................................3-84
Setting the Time...........................................3-85
Radio(s) (MP3).............................................3-87
Using an MP3 (Radio with CD and Six-Disc
CD Player).............................................3-104
Using an MP3 (Radio with CD and DVD
Player)...................................................3-108
XM Radio Messages...................................3-113
Navigation/Radio System..............................3-115
Rear Seat Entertainment (RSE) System.........3-115
Rear Seat Audio (RSA)................................3-125
Rear Audio Controller (RAC).........................3-127
Theft-Deterrent Feature................................3-127
Audio Steering Wheel Controls......................3-128
Radio Reception.........................................3-129
Multi-Band Antenna.....................................3-129
Section 3 Instrument Panel
3-2

Cruise Control
With cruise control, you can maintain a speed of
about 25 mph (40 km/h) or more without keeping
your foot on the accelerator. This can really help on
long trips. Cruise control does not work at speeds
below about 25 mph (40 km/h).
When you apply your brakes, cruise control is turned off.
{CAUTION:
Cruise control can be dangerous where
you cannot drive safely at a steady speed.
So, do not use your cruise control on winding
roads or in heavy traffic.
Cruise control can be dangerous on slippery
roads. On such roads, fast changes in tire
traction can cause excessive wheel slip, and
you could lose control. Do not use cruise
control on slippery roads.The cruise control
buttons are located
on left side of the
steering wheel.T(On/Off):Press this button to turn cruise control
on and off. The indicator comes on when cruise control
is on.
+ RES (Resume/Accelerate):Press this button to
make the vehicle accelerate or resume to a previously
set speed.
SET–:Press this button to set the speed or make the
vehicle decelerate.
[(Cancel):Press this button to cancel cruise control.
3-12

Setting Cruise Control
Cruise control will not work if your parking brake is set,
or if the master cylinder brake uid level is low.
The cruise control light on the instrument panel cluster
comes on after the cruise control has been set to
the desired speed.
{CAUTION:
If you leave your cruise control on when you
are not using cruise, you might hit a button
and go into cruise when you do not want to.
You could be startled and even lose control.
Keep the cruise control switch off until you
want to use cruise control.
1. Press the cruise control on/off button.
2. Get up to the speed desired.
3. Press and release the SET– button located
on the steering wheel.
4. Take your foot off the accelerator.
Resuming a Set Speed
Suppose you set your cruise control at a desired
speed and then you apply the brake. This shuts off
the cruise control. But you do not need to reset it.Once you are driving about 25 mph (40 km/h) or
more, press the +RES button on your steering wheel.
The vehicle will go back to the previously chosen
speed and stay there.
Increasing Speed While Using
Cruise Control
To increase the cruise speed while using cruise control:
Press and hold the +RES button on the steering
wheel until you reach the desired speed, then
release it.
To increase vehicle speed in small increments,
press the +RES button.
Reducing Speed While Using
Cruise Control
To reduce your speed while using cruise control:
Press and hold the SET– button on the steering
wheel until you reach the lower speed desired,
then release it.
To slow down in very small amounts, press
the SET– button on the steering wheel briey.
Each time this is done, the vehicle will go
about 1 mph (1.6 km/h) slower.
3-13

Passing Another Vehicle While Using
Cruise Control
Use the accelerator pedal to increase vehicle speed.
When you take your foot off the pedal, your vehicle
will slow down to the previously set cruise speed.
Using Cruise Control on Hills
How well your cruise control will work on hills depends
upon the vehicle speed, load, and the steepness of
the hills. When going up steep hills, you might have to
step on the accelerator pedal to maintain the vehicle
speed. When going downhill, you might have to brake or
shift to a lower gear to keep the vehicle speed down.
Of course, applying the brake turns off the cruise control.
Many drivers nd this to be too much trouble and do
not use cruise control on steep hills.
Ending Cruise Control
There are three ways to end cruise control:
Step lightly on the brake pedal.
Press the[(cancel) button on the steering wheel.
Press theT(on/off) button on the steering wheel.
Erasing Speed Memory
The cruise control set speed memory is erased by
turning off the cruise control or the ignition.
Exterior Lamps
The exterior lamps
control is located on
the instrument panel
to the left of the
steering wheel.
It controls the following systems:
Headlamps
Taillamps
Parking Lamps
License Plate Lamps
Instrument Panel Lights
Fog Lamps
The exterior lamps control has four positions:
9(Off):Briey turn the control to this position to
turn off the automatic light control. Briey turn to this
position again to turn automatic light control on again.
3-14