towing GMC ACADIA 2012 Owner's Guide

Black plate (49,1)GMC Acadia/Acadia Denali Owner Manual - 2012
Driving and Operating 9-49
If parking the rig on a hill:
1. Press the brake pedal, butdo 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:
1.1. Start the engine.
1.2. Shift into a gear.
1.3. 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.
Maintenance When Trailer
Towing
The vehicle needs service more
often when pulling a trailer.
See Maintenance Schedule on
page 11‑3. 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. See Engine Overheating
on page 10‑18.
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.

Black plate (50,1)GMC Acadia/Acadia Denali Owner Manual - 2012
9-50 Driving and Operating
Use the following chart to determine how much the vehicle can weigh, based upon the vehicle model and options.Vehicle Maximum Trailer Weight *GCWR
Front‐Wheel Drive 2,000 lbs (907 kg)7,500 lbs (3 402 kg)
Front‐Wheel Drive, V92 Trailer Towing Package 5,200 lbs (2 359 kg) 10,250 lbs (4 649 kg)
All‐Wheel Drive 2,000 lbs (907 kg)7,700 lbs (3 493 kg)
All‐Wheel Drive, V92 Trailer Towing Package 5,200 lbs (2 359 kg)10,450 lbs (4 740 kg)
*The Gross Combination Weight Rating (GCWR) is the total allowable weight of the completely loaded vehicle and
trailer including any passengers, cargo, equipment and conversions. The GCWR for the vehicle should not be
exceeded.
Ask your dealer for our
trailering information or advice.
See Customer Assistance Offices
(U.S. and Canada) on page 13‑5 or
Customer Assistance Offices
(Mexico) on page 13‑6 for more
information.
Weight of the Trailer Tongue
The tongue load (A) of any trailer is
an important weight to measure
because it affects the total gross
weight of the vehicle. The Gross
Vehicle Weight (GVW) includes the
curb weight of the vehicle, any
cargo carried in it, and the people
who will be riding in the vehicle. If there are a lot of options,
equipment, passengers or cargo in
the vehicle, it will reduce the tongue
weight the vehicle can carry, which
will also reduce the trailer weight the
vehicle can tow. If towing a trailer,
the tongue load must be added to
the GVW because the vehicle will
be carrying that weight, too. See
Vehicle Load Limits on page 9‑10.

Black plate (51,1)GMC Acadia/Acadia Denali Owner Manual - 2012
Driving and Operating 9-51
If a weight-carrying hitch or a
weight-distributing hitch is being
used, the trailer tongue (A) should
weigh 10‐15 percent of the total
loaded trailer weight (B).
After loading the trailer, weigh the
trailer and then the tongue,
separately, to see if the weights are
proper. If they are not, adjustments
might be made by moving some
items around in the trailer.
Trailering may be limited by the
vehicle's ability to carry tongue
weight. Tongue weight cannot cause
the vehicle to exceed the GVWR
(Gross Vehicle Weight Rating) orthe RGAWR (Rear Gross Axle
Weight Rating). The effect of
additional weight may reduce the
trailering capacity more than the
total of the additional weight.
It is important that the vehicle
does not exceed any of its
ratings
—GCWR, GVWR, RGAWR,
Maximum Trailer Rating or Tongue
Weight. The only way to be sure it is
not exceeding any of these ratings
is to weigh the vehicle and trailer.
Total Weight on the
Vehicle's Tires
Inflate the vehicle's tires to the
upper limit for cold tires. These
numbers can be found on the
Certification label or see Vehicle
Load Limits on page 9‑10 for more
information. Do not go over the
GVW limit for the vehicle, or the
GAWR, including the weight of the
trailer tongue. If using a weight
distributing hitch, do not go over the
rear axle limit before applying the
weight distribution spring bars.
Towing Equipment
Hitches
It is important to have the correct
hitch equipment. Crosswinds, large
trucks going by, and rough roads
are a few reasons why the right
hitch is needed.
.The rear bumper on the vehicle
is not intended for hitches.
Do not attach rental hitches or
other bumper-type hitches to it.
Use only a frame-mounted
hitch that does not attach to the
bumper.
.Will any holes be made in the
body of the vehicle when the
trailer hitch is installed? If so,
then be sure to seal the holes
when the hitch is removed. If the
holes are not sealed, dirt, water,
and deadly carbon monoxide
(CO) from the exhaust may get
into the vehicle. See Engine
Exhaust on page 9‑22.

Black plate (2,1)GMC Acadia/Acadia Denali Owner Manual - 2012
10-2 Vehicle Care
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . 10-37
Tire Sidewall Labeling . . . . . . 10-38
Tire Designations . . . . . . . . . . . 10-40
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . 10-40
Tire Pressure . . . . . . . . . . . . . . . 10-44
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . 10-45
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . 10-46
Tire Inspection . . . . . . . . . . . . . . 10-50
Tire Rotation . . . . . . . . . . . . . . . 10-50
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . 10-51
Buying New Tires . . . . . . . . . . . 10-52
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . 10-54
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . 10-54
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . 10-56 Wheel Replacement . . . . . . . . 10-56
Tire Chains . . . . . . . . . . . . . . . . . 10-57
If a Tire Goes Flat . . . . . . . . . . 10-58
Tire Sealant and
Compressor Kit . . . . . . . . . . . 10-60
Storing the Tire Sealant and Compressor Kit . . . . . . . . . . . 10-68
Tire Changing . . . . . . . . . . . . . . 10-68
Compact Spare Tire . . . . . . . . 10-77
Jump Starting
Jump Starting . . . . . . . . . . . . . . 10-78
Towing
Towing the Vehicle . . . . . . . . . 10-82
Recreational Vehicle Towing . . . . . . . . . . . . . . . . . . . . 10-82
Appearance Care
Exterior Care . . . . . . . . . . . . . . . 10-86
Interior Care . . . . . . . . . . . . . . . . 10-89
Floor Mats . . . . . . . . . . . . . . . . . . 10-92
General Information
For service and parts needs,
visit your dealer. You will receive
genuine GM parts and GM-trained
and supported service people.
Genuine GM parts have one of
these marks:

Black plate (20,1)GMC Acadia/Acadia Denali Owner Manual - 2012
10-20 Vehicle Care
If the overheat warning is displayed
with no sign of steam:
1. Turn the air conditioning off.
2. Turn the heater on to the highesttemperature 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 gauge
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.
Overheated Engine
Protection
Operating Mode
This emergency operating mode lets
the vehicle be driven to a safe place
in an emergency situation. If an
overheated engine condition exists,
an overheat protection mode which
alternates firing groups of cylinders
helps prevent engine damage. In this mode, there is a significant
loss in power and engine
performance. The temperature
gauge indicates an overheat
condition exists. Driving extended
distances and/or towing a trailer in
the overheat protection mode
should be avoided.
Notice:
After driving in the
overheated engine protection
operating mode, to avoid engine
damage, allow the engine to cool
before attempting any repair.
The engine oil will be severely
degraded. Repair the cause of
coolant loss, change the oil
and reset the oil life system.
See Engine Oil on page 10‑8.

Black plate (82,1)GMC Acadia/Acadia Denali Owner Manual - 2012
10-82 Vehicle Care
Towing
Towing the Vehicle
Notice:To avoid damage, the
disabled vehicle should be towed
with all four wheels off the
ground. Care must be taken with
vehicles that have low ground
clearance and/or special
equipment. Always flatbed on
a car carrier.
Consult your dealer or a
professional towing service if the
disabled vehicle must be towed.
See Roadside Assistance Program
(U.S. and Canada) on page 13‑8 or
Roadside Assistance Program
(Mexico) on page 13‑10.
To tow the vehicle behind another
vehicle for recreational purposes,
such as behind a motor home, see
“Recreational Vehicle Towing” in
this section.
Recreational Vehicle
Towing
Recreational vehicle towing means
towing the vehicle behind another
vehicle –such as behind a
motorhome. The two most common
types of recreational vehicle towing
are known as dinghy towing and
dolly towing. Dinghy towing is
towing the vehicle with all four
wheels on the ground. Dolly towing
is towing the vehicle with two
wheels on the ground and two
wheels up on a device known as
a dolly. Here are some important things to
consider before recreational vehicle
towing:.What is the towing capacity
of the towing vehicle?
Be sure to read the tow
vehicle manufacturer's
recommendations.
.What is the distance that will
be travelled? Some vehicles
have restrictions on how far and
how long they can tow.
.Is the proper towing equipment
going to be used? See your
dealer or trailering professional
for additional advice and
equipment recommendations.
.Is the vehicle ready to be
towed? Just as preparing the
vehicle for a long trip, make sure
the vehicle is prepared to be
towed.

Black plate (83,1)GMC Acadia/Acadia Denali Owner Manual - 2012
Vehicle Care 10-83
Dinghy Towing
If the vehicle is front-wheel‐drive, it
can be dinghy towed from the front.
These vehicles may also be towed
by putting the front wheels on a
dolly. See“Dolly Towing” later in this
section. If the vehicle is all‐wheel‐drive, it
can be dinghy towed from the front.
These vehicles can also be towed
by placing them on a platform trailer
with all four wheels off of the
ground. These vehicles cannot be
towed using a dolly.
For vehicles being dinghy towed,
the vehicle should be run at the
beginning of each day and at each
RV fuel stop for about five minutes.
This will ensure proper lubrication of
transmission components. Reinstall
the fuse to start the vehicle.
To tow the vehicle from the front
with all four wheels on the ground:
1. Position the vehicle to be
towed, shift the transmission to
P (Park), and turn the ignition
to LOCK/OFF.
2. Secure the vehicle to the towing vehicle.
3. Set the parking brake.
4. Turn the ignition to ACC/ACCESSORY.
5. Shift the transmission to N (Neutral).

Black plate (84,1)GMC Acadia/Acadia Denali Owner Manual - 2012
10-84 Vehicle Care
6. To prevent the battery fromdraining while the vehicle is
being towed, remove the
20 amp ECM1 fuse and the
50 amp BATT1 fuse from the
underhood fuse block and store
in a safe location. See Engine
Compartment Fuse Block on
page 10‑31.
7. Release the parking brake.
Notice: If the vehicle is towed
without performing each of the
steps listed under “Dinghy
Towing,” the automatic
transmission could be damaged.
Be sure to follow all steps of the
dinghy towing procedure prior to
and after towing the vehicle.
Notice: If 105 km/h (65 mph) is
exceeded while towing the
vehicle, it could be damaged.
Never exceed 105 km/h (65 mph)
while towing the vehicle. Once the destination is reached:
1. Set the parking brake.
2. Reinstall the fuses in the
underhood fuse block.
3. Shift the transmission to P (Park), turn the ignition to
LOCK/OFF and remove the key
from the ignition.
4. Disconnect the vehicle from the towing vehicle.
Notice: Do not tow a vehicle with
the front drive wheels on the
ground if one of the front tires is
a compact spare tire. Towing with
two different tire sizes on the
front of the vehicle can cause
severe damage to the
transmission.Dolly Towing (All-Wheel‐Drive
Vehicles)
All-wheel‐drive vehicles must not be
towed with two wheels on the
ground. To properly tow these
vehicles, they should be placed on
a platform trailer with all four wheels
off of the ground or dinghy towed
from the front.

Black plate (85,1)GMC Acadia/Acadia Denali Owner Manual - 2012
Vehicle Care 10-85
Dolly Towing (Front-Wheel‐
Drive Vehicles Only)
To tow a front-wheel‐drive vehicle
from the front with two wheels on
the ground:
1. Put the front wheels on a dolly.
2. Move the shift lever to P (Park).
3. Set the parking brake.4. Clamp the steering wheel in a
straight-ahead position with a
clamping device designed for
towing.
5. Remove the key from the ignition.
6. Secure the vehicle to the dolly.
7. Release the parking brake.
Towing the Vehicle From
the Rear
Notice: Towing the vehicle from
the rear could damage it. Also,
repairs would not be covered by
the vehicle warranty. Never have
the vehicle towed from the rear.
Do not tow the vehicle from the rear.

Black plate (2,1)GMC Acadia/Acadia Denali Owner Manual - 2012
11-2 Service and Maintenance
Proper vehicle maintenance helps to
keep the vehicle in good working
condition, improves fuel economy,
and reduces vehicle emissions.
Because of the way people use
vehicles, maintenance needs vary.
There may need to be more
frequent checks and services.
The Additional Required Services‐
Normal are for vehicles that:
.Carry passengers and cargo
within recommended limits on
the Tire and Loading Information
label. See Vehicle Load Limits
on page 9‑10.
.Are driven on reasonable road
surfaces within legal driving
limits.
.Use the recommended fuel.
See Recommended Fuel on
page 9‑40.
Refer to the information in the
Maintenance Schedule Additional
Required Services ‐Normal chart. The Additional Required Services
‐
Severe are for vehicles that are:
.Mainly driven in heavy city traffic
in hot weather.
.Mainly driven in hilly or
mountainous terrain.
.Frequently towing a trailer.
.Used for high speed or
competitive driving.
.Used for taxi, police, or delivery
service.
Refer to the information in the
Maintenance Schedule Additional
Required Services ‐Severe chart.
{WARNING
Performing maintenance work
can be dangerous and can
cause serious injury. Perform
maintenance work only if the
required information, proper tools,
and equipment are available.
If they are not, see your dealer to
have a trained technician do the
work. See Doing Your Own
Service Work on page 10‑4.