2008 GMC ACADIA ECO mode

Audio Steering Wheel Controls
Vehicles with audio
steering wheel controls
could differ depending on
your vehicle’s options.
Some audio controls
can be adjusted at the
steering wheel. They
include the following:
xw(Next/Previous):Press the down or up arrow
to go to the next or to the previous radio station stored
as a favorite.
When a CD/DVD is playing, press either arrow to go
to the next or previous track or chapter.
g(Mute/Voice Recognition):Press and release
this button to silence the vehicle speakers only.
The audio of the wireless and wired headphones,
if your vehicle has these features, does not mute.
Press and release this button again, to turn the sound on.If your vehicle has the navigation system, press and hold
this button for longer than one second to initiate voice
recognition. See “Voice Recognition” in the Navigation
System manual for more information.
If your vehicle has OnStar
®, press and hold this button
for longer than one second to interact with the OnStar®
system. If your vehicle also has the navigation system,
press and hold this button for longer than one second
to initiate voice recognition and say “OnStar” to enter
OnStar
®mode. See theOnStar®System on page 2-47
in this manual for more information.
SRCE (Source):Press this button to switch between
the radio (AM, FM), XM™ (if equipped), CD, and if your
vehicle has these features, DVD, front auxiliary, and
rear auxiliary.
+
e−e(Volume):Press the plus or minus volume
button to increase or to decrease the radio volume.
¨(Seek):Press the seek arrow to go to the next
radio station while in AM, FM, or XM™ (if equipped).
Press the seek arrow to go to the next track or chapter
while sourced to the CD or DVD slot.
3-128

Trailer Wiring Harness
Your vehicle is equipped with the following wiring
harness for towing a trailer.
Basic Trailer Wiring
If your vehicle is equipped for heavy duty trailering, the
trailer wiring harness, with a seven-pin connector, is
located at the rear of the vehicle and is tied to the
vehicle’s frame. The harness connector can be plugged
into a seven-pin universal heavy-duty trailer connector
available through your dealer/retailer.
The seven-wire harness contains the following trailer
circuits:
Yellow: Left Stop/Turn Signal
Dark Green: Right Stop/Turn Signal
Brown: Taillamps
Black: Ground
Light Green: Back-up Lamps
Red/Black: Battery Feed
Dark Blue: Trailer Brake**The fuse for this circuit is installed in the underhood
electrical center, but the wires are not connected. They
should be connected by your dealer/retailer or a
qualied service center.
If the back-up lamp circuit is not functional, contact your
dealer/retailer.
If you are charging a remote (non-vehicle) battery, press
the Tow/Haul mode switch located on the center
console near the climate controls. This will boost the
vehicle system voltage and properly charge the battery.
If the trailer is too light for Tow/Haul mode, you can
turn on the headlamps (Non-HID only) as a second way
to boost the vehicle system and charge the battery.
Engine Cooling When Trailer Towing
Your cooling system may temporarily overheat during
severe operating conditions. SeeEngine Overheating on
page 5-25.
4-41

Outward Facing Sidewall:The side of an
asymmetrical tire that has a particular side that
faces outward when mounted on a vehicle.
The side of the tire that contains a whitewall, bears
white lettering, or bears manufacturer, brand,
and/or model name molding that is higher
or deeper than the same moldings on the other
sidewall of the tire.
Passenger (P-Metric) Tire
:A tire used on
passenger cars and some light duty trucks and
multipurpose vehicles.
Recommended Ination Pressure
:Vehicle
manufacturer’s recommended tire ination
pressure as shown on the tire placard. See
Inflation - Tire Pressure on page 5-55andLoading
Your Vehicle on page 4-21.
Radial Ply Tire
:A pneumatic tire in which the
ply cords that extend to the beads are laid at
90 degrees to the centerline of the tread.
Rim
:A metal support for a tire and upon which
the tire beads are seated.Sidewall
:The portion of a tire between the tread
and the bead.
Speed Rating
:An alphanumeric code assigned to
a tire indicating the maximum speed at which a
tire can operate.
Traction
:The friction between the tire and the
road surface. The amount of grip provided.
Tread
:The portion of a tire that comes into
contact with the road.
Treadwear Indicators
:Narrow bands, sometimes
called wear bars, that show across the tread of
a tire when only 1/16 inch (1.6 mm) of tread
remains. SeeWhen It Is Time for New Tires on
page 5-63.
UTQGS (Uniform Tire Quality Grading
Standards)
:A tire information system that
provides consumers with ratings for a tire’s
traction, temperature, and treadwear. Ratings are
determined by tire manufacturers using
government testing procedures. The ratings are
molded into the sidewall of the tire. SeeUniform
Tire Quality Grading on page 5-67.
5-54

TPMS Sensor Matching Process
Each TPMS sensor has a unique identication code.
Any time you rotate your vehicle’s tires or replace one or
more of the TPMS sensors, the identication codes
will need to be matched to the new tire/wheel position.
The sensors are matched to the tire/wheel positions
in the following order: driver side front tire, passenger
side front tire, passenger side rear tire, and driver
side rear tire using a TPMS diagnostic tool. See your
dealer/retailer for service.
The TPMS sensors can also be matched to each
tire/wheel position by increasing or decreasing the tire’s
air pressure. If increasing the tire’s air pressure, do
not exceed the maximum ination pressure indicated on
the tire’s sidewall.
To decrease air-pressure out of a tire you can use the
pointed end of the valve cap, a pencil-style air pressure
gage, or a key.
You have two minutes to match the rst tire/wheel
position, and ve minutes overall to match all four
tire/wheel positions. If it takes longer than two minutes,
to match the rst tire and wheel, or more than ve
minutes to match all four tire and wheel positions the
matching process stops and you need to start over.The TPMS sensor matching process is outlined below:
1. Set the parking brake.
2. Turn the ignition switch to ON/RUN with the
engine off.
3. Press the Remote Keyless Entry (RKE) transmitter’s
LOCK and UNLOCK buttons at the same time for
approximately ve seconds. The horn sounds twice
to signal the receiver is in relearn mode and
TIRE LEARNING ACTIVE message displays on the
DIC screen.
4. Start with the driver side front tire.
5. Remove the valve cap from the valve cap stem.
Activate the TPMS sensor by increasing or
decreasing the tire’s air pressure for ve seconds,
or until a horn chirp sounds. The horn chirp,
which may take up to 30 seconds to sound,
conrms that the sensor identication code has
been matched to this tire and wheel position.
6. Proceed to the passenger side front tire, and repeat
the procedure in Step 5.
7. Proceed to the passenger side rear tire, and repeat
the procedure in Step 5.
5-61

Alternative Service (Canada only):There may be
times, when Roadside Assistance cannot provide
timely assistance. Your advisor may authorize
you to secure local emergency road service, and
you will be reimbursed up to $100 (Canadian) upon
submission of the original receipt to Roadside
Assistance.
In many instances, mechanical failures may be covered.
However, when other services are utilized, our
Roadside Assistance Representatives will explain any
payment obligations you might incur.
GMC and General Motors of Canada Limited reserve
the right to limit services or reimbursement to an owner
or driver when, in their sole discretion, the claims
become excessive in frequency or type of occurrence.
Calling For Assistance
For prompt and efficient assistance when calling, please
provide the following to the Roadside Assistance
Representative:
Your name, home address, and home telephone
number
Telephone number of your location
Location of the vehicle.
Model, year, color, and license plate number of the
vehicle
Odometer reading, Vehicle Identication Number
(VIN), and delivery date of the vehicle
Description of the problem
Towing and Road Service Exclusions
Specically excluded from Roadside Assistance
coverage are towing or services for vehicles operated
on a non-public roadway or highway, nes, impound
towing caused by a violation of local, Municipal, State,
Provincial, or Federal law, and mounting, dismounting or
changing of snow tires, chains, or other traction
devices.
Roadside Assistance is not part of or included in the
coverage provided by the New Vehicle Limited Warranty.
GMC and General Motors of Canada Limited reserve
the right to make any changes or discontinue the
Roadside Assistance program at any time without
notication.
Scheduling Service Appointments
When your vehicle requires warranty service, contact
your dealer/retailer and request an appointment.
By scheduling a service appointment and advising your
service consultant of your transportation needs, your
dealer/retailer can help minimize your inconvenience.
7-8

Current and Past Model Order Forms
Technical Service Bulletins and Manuals are available
for current and past model GM vehicles. To request
an order form, specify year and model name of
the vehicle.
ORDER TOLL FREE: 1-800-551-4123
Monday-Friday 8:00 AM - 6:00 PM
Eastern Time
For Credit Card Orders Only
(VISA-MasterCard-Discover), visit Helm, Inc.
on the World Wide Web at: www.helminc.com
Or you can write to:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207
Prices are subject to change without notice and without
incurring obligation. Allow ample time for delivery.
Note to Canadian Customers: All listed prices are
quoted in U.S. funds. Canadian residents are to make
checks payable in U.S. funds.
Vehicle Data Recording and
Privacy
Your GM vehicle has a number of sophisticated
computers that record information about the vehicle’s
performance and how it is driven. For example,
your vehicle uses computer modules to monitor and
control engine and transmission performance, to monitor
the conditions for airbag deployment and deploy
airbags in a crash and, if so equipped, to provide
antilock braking to help the driver control the vehicle.
These modules may store data to help your
dealer/retailer technician service your vehicle. Some
modules may also store data about how you operate
the vehicle, such as rate of fuel consumption or average
speed. These modules may also retain the owner’s
personal preferences, such as radio pre-sets, seat
positions, and temperature settings.
7-15

Engine
Air Cleaner/Filter.........................................5-20
Check and Service Engine Soon Light............3-50
Coolant......................................................5-22
Coolant Heater............................................2-29
Coolant Temperature Gage...........................3-49
Coolant Temperature Warning Light................3-49
Drive Belt Routing.......................................6-15
Engine Compartment Overview......................5-14
Exhaust.....................................................2-38
Oil .............................................................5-15
Oil Life System...........................................5-18
Overheated Protection Operating Mode...........5-26
Overheating................................................5-25
Running While Parked..................................2-39
Starting......................................................2-27
Entry Lighting.................................................3-17
Event Data Recorders.....................................7-16
Extender, Safety Belt.......................................1-36
Exterior Lamps...............................................3-14
F
Filter
Engine Air Cleaner......................................5-20
Finish Damage...............................................5-95
Flashers, Hazard Warning.................................. 3-6Flash-to-Pass................................................... 3-9
Flat Tire........................................................5-71
Flat Tire, Changing.........................................5-72
Flat Tire, Storing.............................................5-84
Floor Mats.....................................................2-57
Fluid.............................................................5-21
Power Steering...........................................5-33
Windshield Washer......................................5-34
Fog Lamp
Fog ...........................................................3-16
Fog Lamp Light..............................................3-55
Fuel............................................................... 5-6
Additives...................................................... 5-7
California Fuel.............................................. 5-7
Filling a Portable Fuel Container....................5-12
Filling the Tank............................................. 5-9
Fuels in Foreign Countries.............................. 5-8
Gage.........................................................3-56
Gasoline Octane........................................... 5-6
Gasoline Specications.................................. 5-6
Fuses
Fuses and Circuit Breakers.........................5-100
Instrument Panel Fuse Block.......................5-100
Underhood Fuse Block...............................5-103
Windshield Wiper.......................................5-100
5

O
Odometer......................................................3-41
Off-Road Recovery..........................................4-11
Oil
Engine.......................................................5-15
Pressure Light.............................................3-54
Oil, Engine Oil Life System..............................5-18
Older Children, Restraints................................1-36
Online Owner Center........................................ 7-4
OnStar, Privacy..............................................7-17
OnStar
®System, see OnStar®Manual...............2-47
Operation, Universal Home Remote System........2-51
Orange Covered Wiring...................................5-99
Other Warning Devices...................................... 3-6
Outlet Adjustment............................................3-36
Outlets
Accessory Power.........................................3-24
Outside
Convex Mirror.............................................2-44
Heated Mirrors............................................2-44
Power Foldaway Mirrors...............................2-43
Power Mirrors.............................................2-42
Overheated Engine Protection Operating Mode . . . 5-26
Owner Checks and Services.............................. 6-8
Owners, Canadian............................................... ii
P
Paint, Damage...............................................5-95
Parade Dimming.............................................3-18
Park Aid................................................2-45, 2-47
Park Brake....................................................2-35
Park (P)
Shifting Into................................................2-36
Shifting Out of............................................2-37
Parking
Assist........................................................2-45
Over Things That Burn.................................2-38
Passenger Airbag Status Indicator.....................3-43
Passenger Sensing System..............................1-70
Passing.........................................................4-11
PASS-Key
®III+..............................................2-23
PASS-Key®III+ Operation................................2-23
Perchlorate Materials Requirements, California...... 5-4
Power
Door Locks.................................................2-11
Electrical System.......................................5-100
Liftgate......................................................2-14
Lumbar Controls........................................... 1-5
Outlet 115 Volt Alternating Current.................3-25
Retained Accessory (RAP)............................2-27
Seat............................................................ 1-3
9