heating GMC ACADIA 2010 User Guide

Climate Controls 8-7
indicator will change. The
passenger temperature will not be
displayed.
When returning to bi-level, vent,
or floor mode, the previous
temperature settings displays in
place of any change made while in
defrost mode.
Air Conditioning
#(Air Conditioning):Press to
turn the air conditioning (A/C) on
and off. An indicator light comes on
when A/C is on.
The A/C does not work when the
outside temperature is below 4°C
(40°F). If
#is pressed the indicator
flashes three times and turns off to
show that the A/C mode is not
available. If the A/C is on and the
outside temperature drops below a
temperature which is too cool for air
conditioning to be effective, the A/C
indicator turns off to show that the
A/C mode has been canceled. On hot days, open the windows
briefly to let hot inside air escape.
This helps reduce the time it takes
for the interior of the vehicle to
cool down.
The air conditioning system
removes moisture from the air, so
water might drip under the vehicle
while idling or after turning off the
engine. This is normal.
@(Recirculation):
Press to turn
the recirculation mode on or off. An
indicator light comes on when
recirculation is on. When the engine
is turned off, the recirculation mode
automatically turns off and must be
re-selected when the engine is
turned on again.
This mode recirculates and helps to
quickly cool the air inside the
vehicle. It can be used to prevent
outside air and odors from entering
the vehicle. The recirculation mode cannot be
used with floor, defog, or defrosting
modes. If recirculation is selected in
these modes, the indicator flashes
three times and turns off. The air
conditioning compressor also comes
on when this mode is activated.
While in recirculation mode the
windows can fog when the weather
is cold and damp. To clear the fog,
select either the defog or defrost
mode and increase the fan speed.
REAR:
Press to turn the rear
heating and air conditioning on or
off. See Rear Climate Control
System (Rear Climate Control Only)
on page 8‑9or Rear Climate
Control System (Rear Climate with
Rear Seat Audio) on page 8‑10.

9-48 Driving and Operating
The vehicle can tow in D (Drive).
Use a lower gear if the transmission
shifts too often.
When towing at high altitude on
steep uphill grades, engine coolant
will boil at a lower temperature than
at normal altitudes. If the engine is
turned off immediately after towing
at high altitude on steep uphill
grades, the vehicle may show
signs similar to engine overheating.
To avoid this, let the engine run
while parked, preferably on level
ground, with the transmission in
P (Park) for a few minutes before
turning the engine off. If the
overheat warning comes on, see
Engine Overheating on page 10‑19.
On a long uphill grade, shift down
and reduce the vehicle speed to
around 88 km/h (55 mph) to reduce
the possibility of the engine and the
transmission overheating.Parking on Hills
{WARNING
Parking the vehicle on a hill with
the trailer attached can be
dangerous. If something goes
wrong, the rig could start to move.
People can be injured, and both
the vehicle and the trailer can be
damaged. When possible, always
park the rig on a flat surface.
If parking the rig on a hill:
1. Press the brake pedal, but do not shift into P (Park) yet. Turn
the wheels into the curb if facing
downhill or into traffic if facing
uphill.
2. Have someone place chocks under the trailer wheels. 3. When the wheel chocks are in
place, release the brake pedal
until the chocks absorb the load.
4. Reapply the brake pedal. Then apply the parking brake and shift
into P (Park).
5. Release the brake pedal.
Leaving After Parking on a Hill
1. Apply and hold the brake pedal while you:
.Start the engine.
.Shift into a gear.
.Release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.

Driving and Operating 9-49
Maintenance When Trailer
Towing
The vehicle needs service more
often when pulling a trailer. See this
manual's Maintenance Schedule or
Index for more information. Things
that are especially important in
trailer operation are automatic
transmission fluid, engine oil, axle
lubricant, belts, cooling system and
brake system. Inspect these before
and during the trip.
Check periodically to see that all
hitch nuts and bolts are tight.
Engine Cooling When Trailer
Towing
The cooling system may temporarily
overheat during severe operating
conditions. SeeEngine Overheating
on page 10‑19.
Trailer Towing
Three important considerations
have to do with weight:
.The weight of the trailer
.The weight of the trailer tongue
.The total weight on the vehicle's
tires
Weight of the Trailer
How heavy can a trailer safely be?
Speed, altitude, road grades,
outside temperature, special
equipment, and the amount of
tongue weight the vehicle can carry
must be considered. See “Weight of
the Trailer Tongue” later in this
section for more information.
Maximum trailer weight is calculated
assuming only the driver is in the
tow vehicle and it has all the
required trailering equipment. The
weight of additional optional
equipment, passengers and cargo in
the tow vehicle must be subtracted
from the maximum trailer weight.

Vehicle Care 10-1
Vehicle Care
General Information
General Information . . . . . . . . . . 10-3
California Proposition 65Warning . . . . . . . . . . . . . . . . . . . . 10-3
California Perchlorate Materials Requirements . . . . 10-3
Accessories and Modifications . . . . . . . . . . . . . . . 10-3
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 10-4
Hood . . . . . . . . . . . . . . . . . . . . . . . . 10-5
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . 10-6
Engine Cover . . . . . . . . . . . . . . . . 10-7 Engine Oil . . . . . . . . . . . . . . . . . . . 10-8
Engine Oil Life System . . . . . 10-10
Automatic Transmission
Fluid . . . . . . . . . . . . . . . . . . . . . . 10-11
Engine Air Cleaner/Filter . . . . 10-12
Cooling System . . . . . . . . . . . . 10-14
Engine Coolant . . . . . . . . . . . . . 10-14
Engine Overheating . . . . . . . . 10-19
Overheated Engine
Protection
Operating Mode . . . . . . . . . . . 10-21
Power Steering Fluid . . . . . . . 10-21
Washer Fluid . . . . . . . . . . . . . . . 10-22
Brakes . . . . . . . . . . . . . . . . . . . . . 10-23
Brake Fluid . . . . . . . . . . . . . . . . . 10-24
Battery . . . . . . . . . . . . . . . . . . . . . 10-25
All-Wheel Drive . . . . . . . . . . . . . 10-26
Starter Switch Check . . . . . . . 10-26
Automatic Transmission Shift Lock Control System
Check . . . . . . . . . . . . . . . . . . . . . 10-26 Ignition Transmission Lock
Check . . . . . . . . . . . . . . . . . . . . . 10-27
Park Brake and P (Park) Mechanism Check . . . . . . . . 10-27
Wiper Blade
Replacement . . . . . . . . . . . . . . 10-27
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . 10-28
Bulb Replacement
Bulb Replacement . . . . . . . . . . 10-29
Halogen Bulbs . . . . . . . . . . . . . . 10-29
License Plate Lamp . . . . . . . . 10-29
Replacement Bulbs . . . . . . . . . 10-29
Electrical System
High Voltage Devices andWiring . . . . . . . . . . . . . . . . . . . . . 10-30
Electrical System Overload . . . . . . . . . . . . . . . . . . 10-30

Vehicle Care 10-15
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 10‑19.
What to Use
{WARNING
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
(Continued)
WARNING (Continued)
fire 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 −37°C (−34°F), outside
temperature.
.Gives boiling protection up to
129°C (265°F), 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. See
Recommended Fluids and
Lubricants
on page 11‑8for more
information.

Vehicle Care 10-19
9. If the coolant level inside theradiator filler neck is low, add
more of the proper DEX-COOL
coolant mixture through the filler
neck until the level is back up to
the base of the filler neck.
Replace the pressure cap. Be
sure to secure it tightly.
Notice: If the pressure cap is not
tightly installed, coolant loss and
possible engine damage may
occur. Be sure the cap is properly
and tightly secured.
Engine Overheating
The vehicle has several indicators
to warn of engine overheating.
There is an engine coolant
temperature gage on the instrument
panel cluster. See Engine Coolant
Temperature Gage on page 5‑13. The vehicle may also display an
ENGINE OVERHEATED IDLE
ENGINE and ENGINE
OVERHEATED STOP ENGINE
message in the Driver Information
Center (DIC). See
Warning Lights,
Gages, and Indicators
on
page 5‑10.
You may decide not to lift the hood
when this warning appears, but
instead get service help right away.
See Roadside Assistance Program
on page 13‑5.
If you do decide to lift the hood ,
make sure the vehicle is parked on
a level surface.
Then check to see if the engine
cooling fans are running. If the
engine is overheating, both fans
should be running. If they are not,
do not continue to run the engine
and have the vehicle serviced. Notice:
Engine damage from
running the engine without
coolant is not covered by the
warranty.
Notice: If the engine catches fire
while driving with no coolant, the
vehicle can be badly damaged.
The costly repairs would not be
covered by the vehicle warranty.
See Overheated Engine
Protection Operating Mode
on
page 10‑21for information on
driving to a safe place in an
emergency.

Vehicle Care 10-33
FusesUsage
EMISSION 2 Emission 2
EVEN COILS Even Injector Coils
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
FOG LAMP Fog Lamps
FSCM Fuel System
Control Module
HORN Horn
HTD MIR Heated Outside
Rearview Mirror
HVAC BLWR Heating, Ventilation
and Air
Conditioning
Blower
LT HI BEAM Left High-Beam
Headlamp
LT LO BEAM Left Low-Beam
Headlamp
LT PRK Left Parking Lamp Fuses
Usage
LT TRLR
STOP/TRN Trailer Left
Stoplamp and Turn
Signal
ODD COILS Odd Injector Coils
PCM IGN Powertrain Control
Module Ignition
PWR L/GATE Power Liftgate PWR
OUTLET Power Outlet
REAR
CAMERA Rear Camera
RR APO Rear Accessory
Power Outlet
RR DEFOG Rear Defogger
RR HVAC Rear Climate
Control System
RT HI BEAM Right High-Beam
Headlamp
RT LO BEAM Right Low-Beam
Headlamp Fuses
Usage
RT PRK Right
Parking Lamp
RT TRLR
STOP/TRN Trailer Right
Stoplamp and Turn
Signal
RVC SNSR Regulated Voltage
Control Sensor
S/ROOF/
SUNSHADE Sunroof
SERVICE Service Repair SPARE Spare
Stop Lamps
(China Only) Stop Lamps
(China Only)
STRTR Starter
TCM Transmission
Control Module
TRANS Transmission TRLR
BCK/UP Trailer Back-up
Lamps
TRLR BRK Trailer Brake

Vehicle Care 10-35
Fuse SideFuses
Usage
AIRBAG Airbag AMP Amplifier
BCK/
UP/STOP Back-up Lamp/
Stoplamp
BCM Body Control
Module
CNSTR/ VENT Canister Vent
CTSY Courtesy
DR/LCK Door Locks
DRL Daytime Running
Lamps
DRL 2 GMC HID Only/
Rear Fog
Lamps-China Only
DSPLY Display
FRT/WSW Front Windshield
Washer
HTD/
COOL SEAT Heated/Cooling
Seats Fuses
Usage
HVAC Heating, Ventilation
and Air
Conditioning
INADV/
PWR/LED Inadvertent
Power LED
INFOTMNT Infotainment
LT/TRN/SIG Driver Side Turn
Signal
MSM Memory Seat
Module
PDM Power Mirrors,
Liftgate Release
PWR MODE Power Mode
PWR/MIR Power Mirrors RDO Radio
REAR WPR Rear Wiper
RT/TRN/SIG Passenger Side
Turn Signal
SPARE Spare
STR/WHL/ ILLUM Steering Wheel
Illumination

Vehicle Care 10-37
Wheels and Tires
Tires
Your new vehicle comes with
high-quality tires made by a
leading tire manufacturer. If you
ever have questions about your
tire warranty and where to
obtain service, see your vehicle
Warranty booklet for details. For
additional information refer to
the tire manufacturer.
{WARNING
Poorly maintained and improperly
used tires are dangerous.
.Overloading your tires can
cause overheating as a result
of too much flexing. You
could have an air-out and a
serious accident. SeeVehicle
Load Limits on page 9‑10.
(Continued)
WARNING (Continued)
.Underinflated tires pose the
same danger as overloaded
tires. The resulting accident
could cause serious injury.
Check all tires frequently to
maintain the recommended
pressure. Tire pressure
should be checked when your
tires are cold. See Tire
Pressure on page 10‑43.
.Overinflated tires are more
likely to be cut, punctured or
broken by a sudden
impact —such as when you
hit a pothole. Keep tires at
the recommended pressure.
.Worn, old tires can cause
accidents. If your tread is
badly worn, or if your tires
have been damaged,
replace them.
Tire Sidewall Labeling
Useful information about a tire is
molded into its sidewall. The
examples below show a typical
passenger vehicle tire and a
compact spare tire sidewall.
Passenger (P-Metric) Tire Example
(A) Tire Size:The tire size is a
combination of letters and
numbers used to define a
particular tire's width, height,
aspect ratio, construction type,

i-4 INDEX
Driving for Better FuelEconomy . . . . . . . . . . . . . . . . . . . . . 1-20
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . 8-4
DVD Rear Seat EntertainmentSystem . . . . . . . . . . . . . . . . . . . . . . 7-36
DVD/CD Player . . . . . . . . . . . . . . . . 7-14
E
Electrical Equipment, Add-On . . . . . . . . . . . . . . . . . . . . . . 9-55
Electrical System
Engine CompartmentFuse Block . . . . . . . . . . . . . . . . 10-31
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . 10-31
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . . . . 10-34
Overload . . . . . . . . . . . . . . . . . . . 10-30
Engine Air Cleaner/Filter . . . . . . . . . . . 10-12
Check and Service EngineSoon Lamp . . . . . . . . . . . . . . . . . . 5-16
Compartment Overview . . . . . . . 10-6
Coolant . . . . . . . . . . . . . . . . . . . . . 10-14 Engine (cont.)
Coolant Temperature Gage . . . 5-13
Coolant Temperature
Warning Light . . . . . . . . . . . . . . . 5-20
Cooling System . . . . . . . . . . . . . 10-14
Cooling System Messages . . . 5-36
Cover . . . . . . . . . . . . . . . . . . . . . . . . . 10-7
Drive Belt Routing . . . . . . . . . . . . 12-3
Exhaust . . . . . . . . . . . . . . . . . . . . . . 9-21
Overheated Protection Operating Mode . . . . . . . . . . . 10-21
Overheating . . . . . . . . . . . . . . . . 10-19
Power Messages . . . . . . . . . . . . . 5-38
Pressure Light . . . . . . . . . . . . . . . . 5-21
Running While Parked . . . . . . . . 9-22
Starting . . . . . . . . . . . . . . . . . . . . . . . 9-17
Engine Oil Life System . . . . . . . . . . . . . . . . . 10-10
Messages . . . . . . . . . . . . . . . . . . . . 5-37
Entry Lighting . . . . . . . . . . . . . . . . . . . 6-6
Equipment, Towing . . . . . . . . . . . . 9-53
Event Data Recorders . . . . . . . . 13-14
Extender, Safety Belt . . . . . . . . . . 3-28
Exterior Lamp Controls . . . . . . . . . 6-1
F
Filter Engine Air Cleaner . . . . . . . . . 10-12
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 6-2
Flashers, Hazard Warning . . . . . . 6-3
Flat Tire . . . . . . . . . . . . . . . . . . . . . . 10-56
Flat Tire, Changing . . . . . . . . . . . 10-66
Floor Console Storage . . . . . . . . . . 4-2
Floor Mats . . . . . . . . . . . . . . . . . . . . 10-91
Fluid Automatic Transmission . . . . .10-11
Brakes . . . . . . . . . . . . . . . . . . . . . . 10-24
Power Steering . . . . . . . . . . . . . 10-21
Washer . . . . . . . . . . . . . . . . . . . . . 10-22
Fog Lamps Bulb Replacement . . . . . . . . . . . . . 6-4
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22
Folding Mirrors . . . . . . . . . . . . . . . . 2-16
Front Seats Adjustment . . . . . . . . . . . . . . . . . . . . 3-3
Heated . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Heated and Ventilated . . . . . . . . . 3-9