2009 GMC ACADIA heater

Notice:Using coolant other
than DEX-COOL®can cause
premature engine, heater core,
or radiator corrosion. In addition,
the engine coolant could require
changing sooner, at 30,000 miles
(50 000 km) or 24 months,
whichever occurs rst. Any
repairs would not be covered by
the vehicle warranty. Always use
DEX-COOL
®(silicate-free) coolant
in the vehicle.
Engine Coolant
The cooling system in the vehicle
is lled with DEX-COOL®engine
coolant. The coolant is designed to
remain in the vehicle for ve years
or 150,000 miles (240 000 km),
whichever occurs rst.
The following explains the cooling
system and how to check and add
coolant when it is low. If there is a
problem with engine overheating,
seeEngine Overheating on
page 5-21.
What to Use
{CAUTION
Adding only plain water to the
cooling system can be dangerous.
Plain water, or some other liquid
such as alcohol, can boil before
the proper coolant mixture will.
The vehicle’s coolant warning
system is set for the proper
coolant mixture. With plain water
or the wrong mixture, the engine
could get too hot but you would
not get the overheat warning. The
engine could catch re and you or
others could be burned. Use a
50/50 mixture of clean, drinkable
water and DEX-COOL
®coolant.
Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
coolant. If using this mixture,
nothing else needs to be added.
This mixture:
Gives freezing protection down to
−34°F (−37°C), outside
temperature.
Gives boiling protection up to
265°F (129°C), engine
temperature.
Protects against rust and
corrosion.
Will not damage aluminum parts.
Helps keep the proper engine
temperature.
Notice:If an improper coolant
mixture is used, the engine could
overheat and be badly damaged.
The repair cost would not be
covered by the vehicle warranty.
Too much water in the mixture
can freeze and crack the engine,
radiator, heater core, and other
parts.
Notice:If extra inhibitors
and/or additives are used in the
vehicle’s cooling system, the
vehicle could be damaged.
Use only the proper mixture
of the engine coolant listed in this
manual for the cooling system.
SeeRecommended Fluids
and Lubricants on page 6-12
for more information.
Service and Appearance Care 5-17

If Steam Is Coming From The
Engine Compartment
{CAUTION
Steam from an overheated engine
can burn you badly, even if you
just open the hood. Stay away
from the engine if you see or hear
steam coming from it. Turn it off
and get everyone away from the
vehicle until it cools down. Wait
until there is no sign of steam or
coolant before you open the hood.
If you keep driving when the
vehicles engine is overheated, the
liquids in it can catch re. You or
others could be badly burned.
Stop the engine if it overheats,
and get out of the vehicle until the
engine is cool.
SeeOverheated Engine
Protection Operating Mode on
page 5-23for information on
driving to a safe place in an
emergency.
If No Steam Is Coming From
The Engine Compartment
If an engine overheat warning is
displayed but no steam can be seen
or heard, the problem may not be too
serious. Sometimes the engine can
get a little too hot when the vehicle:
Climbs a long hill on a hot day.
Stops after high-speed driving.
Idles for long periods in traffic.
Tows a trailer.
If the overheat warning is displayed
with no sign of steam:
1. Turn the air conditioning off.
2. Turn the heater on to the highest
temperature and to the highest
fan speed. Open the windows as
necessary.
3. If in a traffic jam, shift to
N (Neutral), otherwise, shift
to the highest gear while
driving—D(Drive) or L (Low).If the temperature overheat gage is
no longer in the overheat zone or an
overheat warning no longer displays,
the vehicle can be driven. Continue
to drive the vehicle slow for about
10 minutes. Keep a safe vehicle
distance from the car in front of you.
If the warning does not come back
on, continue to drive normally.
If the warning continues, pull
over, stop, and park the vehicle
right away.
If there is no sign of steam, idle
the engine for three minutes while
parked. If the warning is still
displayed, turn off the engine until it
cools down. Also, see “Overheated
Engine Protection Operating Mode”
next in this section.
5-22 Service and Appearance Care

Doing Your Own
Service Work..................... 5-4
Dome Lamp Override...........3-14
Dome Lamps .......................3-14
Door
Delayed Locking................. 2-8
Locks............................... 2-8
Power Door Locks.............. 2-8
Programmable Automatic
Door Locks.................... 2-9
Rear Door Security Locks.... 2-9
Driver
Seat Height Adjuster........... 1-3
Driver Information
Center (DIC)....................3-46
DIC Operation
and Displays........3-46, 3-51
DIC Vehicle
Customization...............3-64
DIC Warnings and
Messages....................3-56
Driving
At Night..........................4-10
Before a Long Trip............4-12
Defensive.......................... 4-2
Drunken............................ 4-2
Highway Hypnosis............4-12
Hill and Mountain Roads....4-12Driving (cont.)
In Rain and on
Wet Roads...................4-11
Rocking Your Vehicle to
Get it Out ....................4-15
Winter.............................4-13
Driving for Better Fuel
Economy........................... 4-1
Dual Automatic Climate
Control System.................3-25
DVD
Rear Seat Entertainment
System......................3-109
E
EDR ..................................7-16
Electrical System
Add-On Equipment............5-89
Fuses and Circuit
Breakers......................5-90
Instrument Panel
Fuse Block...................5-90
Power Windows and Other
Power Options..............5-90
Underhood Fuse Block......5-92
Windshield Wiper Fuses....5-90
Electronic Immobilizer
PASS-Key
®III+................2-17Electronic Immobilizer
Operation
PASS-Key
®III+................2-18
Engine
Air Cleaner/Filter...............5-15
Check and Service Engine
Soon Lamp..................3-41
Coolant...........................5-17
Coolant Heater.................2-23
Coolant
Temperature Gage.........3-40
Coolant Temperature
Warning Light...............3-40
Drive Belt Routing.............6-15
Engine Compartment
Overview......................5-10
Exhaust...........................2-30
Oil ..................................5-11
Oil Life System.................5-13
Overheated Protection
Operating Mode............5-23
Overheating.....................5-21
Starting...........................2-22
Entry Lighting......................3-14
Event Data Recorders..........7-16
Extender, Safety Belt............1-28
Exterior Lamps....................3-11
i-4 INDEX

F
Filter
Engine Air Cleaner............5-15
Finish Damage....................5-88
Flashers, Hazard Warning....... 3-5
Flash-to-Pass........................ 3-7
Flat Tire..............................5-55
Flat Tire, Changing...............5-69
Flat Tire, Storing..................5-78
Floor Mats..........................2-50
Fluid
Automatic Transmission.....5-16
Power Steering.................5-23
Windshield Washer...........5-24
Fog Lamp
Fog ................................3-13
Fog Lamp Light...................3-44
Fuel..................................... 5-5
Additives........................... 5-5
California Fuel................... 5-5
Driving for Better Economy . . . 4-1
Filling a Portable Fuel
Container....................... 5-8
Filling the Tank.................. 5-7
Fuels in Foreign Countries . . . 5-6
Gage ..............................3-45Fuel (cont.)
Gasoline Octane................ 5-5
Gasoline Specications........ 5-5
Fuses
Fuses and Circuit
Breakers......................5-90
Instrument Panel
Fuse Block...................5-90
Underhood Fuse Block......5-92
Windshield Wiper..............5-90
G
Gage
Engine Coolant
Temperature.................3-40
Fuel................................3-45
Speedometer...................3-35
Tachometer......................3-35
Voltmeter Gage................3-38
Garage Door Opener............2-44
Gasoline
Octane............................. 5-5
Specications..................... 5-5
Glove Box...........................2-49
GM Mobility Reimbursement
Program............................ 7-5
H
Hazard Warning Flashers........ 3-5
Head Restraints..................... 1-2
Headlamp
Aiming ............................5-33
Headlamps
Bulb Replacement.............5-33
Daytime Running Lamps/
Automatic Headlamp
System........................3-13
Delayed..........................3-12
Exterior Lamps.................3-11
Flash-to-Pass..................... 3-7
Halogen Bulbs..................5-33
High/Low Beam Changer..... 3-7
Head-Up Display (HUD)........3-17
Heated Seats.................1-5, 1-6
Heater................................3-22
Engine Coolant.................2-23
Heater................................3-25
Height Adjuster, Driver Seat.... 1-3
High Voltage Devices and
Wiring.............................5-89
Highbeam On Light..............3-45
Highway Hypnosis................4-12
Hill and Mountain Roads.......4-12
INDEX i-5