2008 GMC ACADIA lights

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 Identication
.................................5-98
Electrical System
......................................5-99
Capacities and Specications
...................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

Power Lumbar
If the seats have power lumbar, the controls used to
operate this feature are located on the outboard side of
the seats. SeePower Seats on page 1-3for more
information.
To increase lumbar support, press and hold the
front of the control.
To decrease lumbar support, press and hold the
rear of the control.
To raise the height of the lumbar support, press
and hold the top of the control.
To lower the height of the lumbar support, press
and hold the bottom of the control.
Release the control when the lower seatback reaches
the desired level of lumbar support.
You may need to adjust the lumbar support whenever
you change your seating position.
Heated Seats
On vehicles with heated front seats the controls are
located on the center console. To operate the heated
seats the engine must be running.
I(Heated Seatback):Press this button to turn on the
heated seatback.
J(Heated Seat and Seatback):Press this button to
turn on the heated seat and seatback.
The light on the button will come on to indicate that the
feature is working. Press the button to cycle through
the temperature settings of high, medium, and low and
to turn the heat to the seat off. Indicator lights above
the button will show the level of heat selected: three for
high, two for medium, and one for low.
The passenger seat may take longer to heat up.
If your vehicle has remote vehicle start and is started
using the remote keyless entry transmitter, the front
heated seats will be turned on to the high setting if it is
cold outside. See “Remote Vehicle Start” under
Remote Keyless Entry (RKE) System Operation on
page 2-5. When the key is inserted into the ignition and
the ignition is turned on, the heated seat feature will
turn off. To turn the heated seat feature back on, press
the desired button.
1-5

The RKE transmitter with the remote start button,
provides an increased range of operation. However, the
range may be less while the vehicle is running. As a
result, you may need to be closer to your vehicle to turn
it off, than you were to turn it on.
There are other conditions which can affect the
performance of the transmitter, seeRemote Keyless
Entry (RKE) System on page 2-4for additional
information.
/(Remote Start):This button will be on the RKE
transmitter if you have remote start.
To start the vehicle:
1. Aim the transmitter at the vehicle.
2. Press and release the transmitter’s lock button, then
immediately press and hold the transmitter’s remote
start button until the turn signal lights ash. If you
cannot see the vehicle’s lights, press and hold the
remote start button for at least four seconds. The
vehicle’s doors will lock. Pressing the remote start
button again, after the vehicle has started, will shut
the vehicle off.
When the vehicle starts, the parking lamps will turn
on and remain on while the vehicle is running.3. If it is the rst remote start since the vehicle has
been driven, repeat these steps while the engine
is still running, to extend the time by 10 minutes for
the engine to continue to run. Remote start can
be extended one time.
After entering the vehicle during a remote start, insert
and turn the key to the ON/RUN position to drive
the vehicle.
If the vehicle is left running it will automatically shut off
after 10 minutes unless a time extension has been done.
To manually shut off a remote start:
Aim the RKE transmitter at the vehicle and press
the remote start button until the parking lamps
turn off.
Turn on the hazard warning ashers.
Turn the ignition switch on and then off.
The vehicle can be started using the remote start
feature two separate times between driving sequences.
The engine will run for 10 minutes after each remote
start.
Or, you can extend the engine run time by another
10 minutes within the rst 10 minute remote start time
frame, and before the engine stops.
2-8

The liftgate can also be closed by pressing the power
liftgate button next to the liftgate latch. Press the button
a second time during liftgate operation to reverse that
operation.
The power liftgate may be temporarily disabled under
extreme temperatures, or under low battery conditions. If
this occurs, the liftgate can still be operated manually.If you shift the transmission out of PARK (P) while the
power function is in progress, the liftgate power function
will continue to completion. If you shift the transmission
out of PARK (P) and accelerate before the power
liftgate latches closed, the liftgate may reverse to the
open position. Cargo could fall out of the vehicle. Always
make sure the power liftgate is closed and latched
before you drive away.
If you power open the liftgate and the liftgate support
struts have lost pressure, the lights will ash and a
chime will sound. The liftgate will stay open temporarily,
then slowly close. See your dealer/retailer for service
before using the liftgate.
Obstacle Detection Features
If the liftgate encounters an obstacle during a power
open or close cycle, a warning chime will sound and the
liftgate will automatically reverse direction to the full
closed or open position. After removing the obstruction,
the power liftgate operation can be used again. If the
liftgate encounters multiple obstacles on the same power
cycle, the power function will deactivate, and you
must manually open or close the liftgate. The LIFTGATE
OPEN warning message in the Driver Information
Center (DIC) will indicate that the liftgate is open. After
removing the obstructions, manually open the liftgate
to the full open position or close the liftgate to the fully
closed and latched position. The liftgate will now
resume normal power operation. Power Liftgate Button Near Liftgate Latch
2-16

Your vehicle has pinch sensors located on the side
edges of the liftgate. If an object is caught between the
liftgate and the body and presses against this sensor,
the liftgate will reverse direction and open fully.
The liftgate will remain open until it is activated again or
closed manually. Do not force the liftgate open or
closed during a power cycle.
Manual Operation of Power Liftgate
To change the liftgate to
manual operation, press
the switch on the
center console to the OFF
position.
With the power liftgate disabled and all of the doors
unlocked, the liftgate can be manually opened and
closed.To open the liftgate, press the touchpad on the handle
on the outside of the liftgate, and lift the gate open.
To close the liftgate, use the pull cup to lower the liftgate
and close. The liftgate latch will power close. Always
close the liftgate before driving.
If the RKE button or the power close button on the liftgate
is pressed while power operation is disabled, the lights
will ash three times, but the liftgate will not move.
It is not recommended that you drive with the liftgate
open, however, if you must drive with the liftgate open,
the liftgate should be set to manual operation by
pressing the OFF switch on the center console.
The liftgate has an electric latch. If the battery is
disconnected or has low voltage, the liftgate will not
open. The liftgate will resume operation when the battery
is reconnected and charged.
If the battery is properly connected with adequate
voltage, the switch is not disabled, and the liftgate still
will not function, your vehicle should be taken to a
dealer/retailer for service.
2-17

If a locked door is opened without using the key in the
driver’s door key cylinder or the RKE transmitter, a
ten second pre-alarm will occur. The horn will chirp and
the lights will ash. If the key is not placed in the
ignition and turned to START or the door is not unlocked
by pressing the unlock button on the RKE transmitter
during the ten second pre-alarm, the alarm will go
off. Your vehicle’s headlamps will ash and the horn will
sound for about two minutes, then will turn off to save
the battery power.
The theft-deterrent system will not activate if the doors
are locked with the vehicle’s key or the manual door
lock. It activates only if you use the power door
lock switch with the door open or the RKE transmitter.
You should also remember that you can start your
vehicle with the correct ignition key if the alarm has been
set off.
Here is how to avoid setting off the alarm by accident:
If you do not want to activate the theft-deterrent
system, the vehicle should be locked with the
door key after the doors are closed.
Always unlock a door with the RKE transmitter.
Unlocking a door any other way will set off the alarm
if the system has been armed.If you set off the alarm by accident, turn off the alarm by
pressing unlock on the RKE transmitter or by placing
the key in the ignition and turning it to START.
Testing the Alarm
To test the alarm:
1. From inside the vehicle, lower the driver’s window
and open the driver’s door.
2. Activate the system by locking the doors with the
RKE transmitter.
3. Get out of the vehicle, close the door and wait for
the security light to go out.
4. Then reach in through the window, unlock the door
with the manual door lock and open the door. This
should set off the alarm.
If the alarm does not sound when it should, but the
vehicle’s headlamps ash, check to see if the horn
works. The horn fuse may be blown. To replace the
fuse, seeFuses and Circuit Breakers on page 5-100.
If the alarm does not sound or the vehicle’s headlamps
do not ash, see your dealer/retailer for service.
2-22

Ignition Positions
With the key in the ignition,
you can turn it to four
different positions.
In order to shift out of PARK (P), ignition must be in
ON/RUN or ACC/ACCESSORY and the regular brake
pedal must be applied.
Notice:Using a tool to force the key from the
ignition switch could cause damage or break the key.
Use the correct key and turn the key only with your
hand. Make sure the key is all the way in. If none of
this works, then your vehicle needs service.
A (LOCK/OFF):This is the only position in which you
can remove the key. This position locks the ignition and
transmission. If the steering wheel is locked, move it from
right to left and turn the key to ACC/ACCESSORY. If
none of this works, then your vehicle needs service.B (ACC/ACCESSORY):This position allows you to use
things like the radio and the windshield wipers while
the engine is off. This position will also allow you to turn
off the engine.
C (ON/RUN):This is the position that the switch returns
to after you start your engine and release the key.
The switch stays in ON/RUN when the engine is
running. But even when the engine is not running, you
can use ON/RUN to operate your electrical power
accessories, and to display some instrument panel
warning lights.
The battery could be drained if you leave the key in the
ACC/ACCESSORY or ON/RUN position with the
engine off. You may not be able to start your vehicle if
the battery is allowed to drain for an extended period
of time.
D (START):This position starts the engine. When the
engine starts, release the key. The ignition switch
will return to ON/RUN for normal driving.
2-26

The display is located in
the headliner and can be
seen by looking over
your right shoulder.
URPA uses three color-coded lights to provide distance
and system information.
How the System Works
URPA comes on automatically when the shift lever is
moved into REVERSE (R). The rear display will
then briey illuminate to let you know the system is
working.
URPA operates only at speeds less than 5 mph
(8 km/h). If you are above this speed, the red light on
the rear display will ash.To be detected, objects must be at least 10 inches
(25.4 cm) off the ground and below liftgate level. Objects
must also be within 8 feet (2.5 m) from your rear
bumper. This distance may be less during warmer or
humid weather.
A single beep will sound the rst time an object is
detected between 20 inches (0.5 m) and 8 feet (2.5 m)
away. Beeping will occur for three seconds when
you are closer than 1 foot (0.3 m) from the object.
The following describes what will occur with the URPA
display as you get closer to a detected object:
Description English Metric
amber light 8 ft 2.5 m
amber/amber lights 40 in 1.0 m
amber/amber/red lights 23 in 0.6 m
amber/amber/red lights
ashing and beep for
three seconds1 ft 0.3 m
The system can be disabled through the Driver
Information Center (DIC). See “Park Assist” underDIC
Operation and Displays (With DIC Buttons) on
page 3-57orDIC Operation and Displays (Without DIC
Buttons) on page 3-63for more information.
2-46