Seats and Restraint Systems........................... 1-1
Front Seats
............................................... 1-2
Rear Seats
..............................................1-11
Safety Belts
.............................................1-16
Child Restraints
.......................................1-36
Airbag System
.........................................1-61
Restraint System Check
............................1-77
Features and Controls..................................... 2-1
Keys
........................................................ 2-3
Doors and Locks
......................................2-10
Windows
.................................................2-18
Theft-Deterrent Systems............................2-21
Starting and Operating Your Vehicle
...........2-25
Mirrors
....................................................2-40
Object Detection Systems
..........................2-45
OnStar
®System
......................................2-47
Universal Home Remote System
................2-50
Storage Areas
.........................................2-55
Sunroof
..................................................2-60
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-4
Climate Controls
......................................3-26
Warning Lights, Gages, and Indicators
........3-39
Driver Information Center (DIC)
..................3-57
Audio System(s)
.......................................3-84Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-26
Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-6
Checking Things Under the Hood
...............5-12
All-Wheel Drive
........................................5-43
Headlamp Aiming
.....................................5-45
Bulb Replacement
....................................5-45
Windshield Wiper Blade Replacement
.........5-47
Tires
......................................................5-48
Appearance Care
.....................................5-89
Vehicle Identi cation
.................................5-98
Electrical System
......................................5-99
Capacities and Speci cations
...................5-107
Maintenance Schedule..................................... 6-1
Maintenance Schedule
................................ 6-2
Customer Assistance Information.................... 7-1
Customer Assistance and Information
........... 7-2
Reporting Safety Defects
...........................7-13
Vehicle Data Recording and Privacy
...........7-15
Index................................................................ 1
2008 GMC Acadia Owner ManualM
Using the Remote Keyless Entry (RKE) transmitter to
enter your vehicle with the remote recall memory feature
on causes automatic seat and mirror adjustment.
There is no adjustment when the position has not been
changed by another seating position or the easy exit
feature. See “MEMORY SEAT RECALL” under
DIC Vehicle Customization (With DIC Buttons) on
page 3-75for more information.
To stop recall movement of the memory feature at any
time, press one of the power seat controls, memory
buttons, or power mirror buttons.
If something has blocked the driver’s seat while recalling
a memory position, the driver’s seat recall may stop
working. If this happens, press the appropriate control
for the area that is not recalling for two seconds,
after the obstruction is removed. Then try recalling the
memory position again by pressing the appropriate
memory button. If the memory position is still not being
recalled, see your dealer/retailer for service.Easy Exit Seat
The control for this feature is located on the driver’s
door panel between buttons 1 and 2.
With the vehicle in PARK (P), the exit position can be
recalled by pressing the exit button. You will hear
a single beep. The driver’s seat will move back.
If the easy exit seat feature is on in the Driver
Information Center (DIC), automatic seat movement will
occur when the key is removed from the ignition.
See “EASY EXIT SEAT” underDIC Vehicle
Customization (With DIC Buttons) on page 3-75for
more information.
Further programming for the memory seat feature can
be done using the DIC. You can select or cancel
the following:
The automatic easy exit seat feature.
The remote memory seat recall feature.
For programming information, seeDIC Vehicle
Customization (With DIC Buttons) on page 3-75.
1-7
6. To make the lap part tight, pull up on the
shoulder belt.
It may be necessary to pull the stitching on the
safety belt through the latch plate to fully tighten the
lap belt on smaller occupants.
To unlatch the belt, push the button on the buckle. The
belt should go back out of the way. When the safety
belt is not in use, slide the latch plate up the safety belt
webbing. The latch plate should rest on the stitching
on the safety belt, near the guide loop on the side wall.
Before you close a door, be sure the belt is out of
the way. If you slam the door on it, you can damage
both the belt and your vehicle.
Shoulder Belt Height Adjustment
Your vehicle has shoulder belt height adjusters for the
driver and right front passenger.
Adjust the height so that the shoulder portion of the belt
is centered on your shoulder. The belt should be
away from your face and neck, but not falling off your
shoulder. Incorrect positioning of the shoulder belt
can reduce the effectiveness of the safety belt.
To move it down, push
down on the button (A)
and move the height
adjuster to the desired
position. You can move the
height adjuster up by
pushing up on the shoulder
belt guide.
After you move the height adjuster to where you want it,
try to move it down without pushing the button down
to make sure it has locked into position.
1-31
The roof-rail airbags for the driver, right front passenger,
passengers behind the driver and right front passenger,
and the third row outboard passengers are in the
ceiling above the side windows.
{CAUTION:
If something is between an occupant and an
airbag, the airbag might not in ate properly or
it might force the object into that person
causing severe injury or even death. The path
of an in ating airbag must be kept clear. Do
not put anything between an occupant and an
airbag, and do not attach or put anything on
the steering wheel hub or on or near any other
airbag covering.
Do not use seat accessories that block the
in ation path of a seat-mounted side impact
airbag.
If your vehicle has roof-rail airbags, never
secure anything to the roof of your vehicle by
routing the rope or tie down through any door
or window opening. If you do, the path of an
in ating roof-rail airbag will be blocked. Driver Side shown, Passenger Side similar
1-66
But airbags would not help in many types of collisions,
primarily because the occupant’s motion is not
toward those airbags. SeeWhen Should an Airbag
Inflate? on page 1-67for more information.
Airbags should never be regarded as anything more
than a supplement to safety belts.
What Will You See After an Airbag
In ates?
After the frontal airbags and seat-mounted side impact
airbags in ate, they quickly de ate, so quickly that
some people may not even realize an airbag in ated.
Roof-rail airbags may still be at least partially in ated for
some time after they deploy. Some components of
the airbag module may be hot for several minutes. For
location of the airbag modules, seeWhat Makes an
Airbag Inflate? on page 1-68.
The parts of the airbag that come into contact with you
may be warm, but not too hot to touch. There may
be some smoke and dust coming from the vents in the
de ated airbags. Airbag in ation does not prevent
the driver from seeing out of the windshield or being
able to steer the vehicle, nor does it prevent people from
leaving the vehicle.
{CAUTION:
When an airbag in ates, there may be dust in
the air. This dust could cause breathing
problems for people with a history of asthma
or other breathing trouble. To avoid this,
everyone in the vehicle should get out as soon
as it is safe to do so. If you have breathing
problems but cannot get out of the vehicle
after an airbag in ates, then get fresh air by
opening a window or a door. If you experience
breathing problems following an airbag
deployment, you should seek medical
attention.
Your vehicle has a feature that may automatically
unlock the doors, turn the interior lamps on, and turn
the hazard warning ashers on when the airbags in ate.
You can lock the doors, turn the interior lamps off,
and turn the hazard warning ashers off by using the
controls for those features.
1-69
Keys...............................................................2-3
Remote Keyless Entry (RKE) System................2-4
Remote Keyless Entry (RKE) System
Operation...................................................2-5
Remote Vehicle Start......................................2-7
Doors and Locks............................................2-10
Door Locks..................................................2-10
Power Door Locks........................................2-11
Delayed Locking...........................................2-11
Programmable Automatic Door Locks..............2-11
Rear Door Security Locks..............................2-11
Lockout Protection........................................2-12
Liftgate........................................................2-13
Power Liftgate..............................................2-14
Windows........................................................2-18
Power Windows............................................2-19
Sun Visors...................................................2-21
Theft-Deterrent Systems..................................2-21
Content Theft-Deterrent.................................2-21
PASS-Key
®III+............................................2-23
PASS-Key®III+ Operation..............................2-23
Starting and Operating Your Vehicle................2-25
New Vehicle Break-In....................................2-25
Ignition Positions..........................................2-26Retained Accessory Power (RAP)...................2-27
Starting the Engine.......................................2-27
Engine Coolant Heater..................................2-29
Automatic Transmission Operation...................2-30
Tow/Haul Mode............................................2-34
Parking Brake..............................................2-35
Shifting Into PARK (P)...................................2-36
Shifting Out of PARK (P)...............................2-37
Parking Over Things That Burn.......................2-38
Engine Exhaust............................................2-38
Running the Engine While Parked...................2-39
Mirrors...........................................................2-40
Manual Rearview Mirror with OnStar
®..............2-40
Automatic Dimming Rearview Mirror with
OnStar
®and Compass...............................2-40
Outside Power Mirrors...................................2-42
Outside Power Foldaway Mirrors.....................2-43
Outside Convex Mirror...................................2-44
Outside Heated Mirrors..................................2-44
Object Detection Systems...............................2-45
Ultrasonic Rear Parking
Assist (URPA)...........................................2-45
Rear Vision Camera......................................2-47
OnStar
®System.............................................2-47
Section 2 Features and Controls
2-1
Keys
{CAUTION:
Leaving children in a vehicle with the ignition
key is dangerous for many reasons, children
or others could be badly injured or even killed.
They could operate the power windows or
other controls or even make the vehicle move.
The windows will function with the keys in the
ignition and they could be seriously injured or
killed if caught in the path of a closing
window. Do not leave the keys in a vehicle
with children.
The key can be used for the ignition and all door locks.
The key has a bar-coded key tag that the dealer/retailer
or quali ed locksmith can use to make new keys.
Store this information in a safe place, not in your vehicle.
2-3
Remote Keyless Entry (RKE)
System Operation
The Remote Keyless Entry (RKE) transmitter functions
will work up to 195 feet (60 m) away. However, the
operating range may be less while the vehicle is running.
There are other conditions which can affect the
performance of the transmitter. SeeRemote Keyless
Entry (RKE) System on page 2-4.
/(Remote Vehicle Start):If your vehicle has this
feature, press
/to start the engine from outside the
vehicle using the RKE transmitter. SeeRemote
Vehicle Start on page 2-7for additional information.
Q(Lock):PressQto lock all the doors. If enabled
through the Driver Information Center (DIC), the parking
lamps will ash once to indicate locking has occurred.
If enabled through the DIC, the horn will chirp when
Q
is pressed again within ve seconds of the previous
press of the lock button. SeeDIC Vehicle Customization
(With DIC Buttons) on page 3-75for additional
information. Pressing
Qmay arm the content
theft-deterrent system. SeeContent Theft-Deterrent on
page 2-21.
"(Unlock):Press"to unlock the driver’s door. If"is
pressed again within ve seconds, all remaining
doors will unlock. The interior lamps will come on and
stay on for 20 seconds or until the ignition is turned on. If
enabled through the DIC, the parking lamps will ash
twice to indicate unlocking has occurred. SeeDIC
Vehicle Customization (With DIC Buttons) on page 3-75.
Pressing
"on the RKE transmitter will disarm the
content theft-deterrent system. SeeContent
Theft-Deterrent on page 2-21. With Remote Start and
Liftgate (Without
Remote Start or Liftgate
Similar)
2-5