GMC Acadia Limited Owner Manual (GMNA-Localizing-U.S.-10283134) -
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Vehicle Care 257
GM strongly recommends
buying tires with the same TPC
Spec rating.
GM's exclusive TPC Spec
system considers over a dozen
critical specifications that impact
the overall performance of the
vehicle, including brake system
performance, ride and handling,
traction control, and tire
pressure monitoring
performance. GM's TPC Spec
number is molded onto the tire's
sidewall near the tire size. If the
tires have an all-season tread
design, the TPC Spec number
will be followed by MS for mud
and snow. SeeTire Sidewall
Labeling 0244.
GM recommends replacing worn
tires in complete sets of four.
Uniform tread depth on all tires
will help to maintain the
performance of the vehicle.
Braking and handling
performance may be adversely
affected if all the tires are not replaced at the same time.
If proper rotation and
maintenance have been done,
all four tires should wear out at
about the same time. See
Tire
Rotation 0255. However, if it is
necessary to replace only one
axle set of worn tires, place the
new tires on the rear axle.
Winter tires with the same speed
rating as the original equipment
tires may not be available for H,
V, W, Y and ZR speed rated
tires. Never exceed the winter
tires’ maximum speed capability
when using winter tires with a
lower speed rating.
{Warning
Tires could explode during
improper service. Attempting
to mount or dismount a tire
could cause injury or death.
Only your dealer or authorized
tire service center should
mount or dismount the tires.
{Warning
Mixing tires of different sizes,
brands, or types may cause
loss of control of the vehicle,
resulting in a crash or other
vehicle damage. Use the
correct size, brand, and type
of tires on all wheels.
{Warning
Using bias-ply tires on the
vehicle may cause the wheel
rim flanges to develop cracks
after many miles of driving.
A tire and/or wheel could fail
suddenly and cause a crash.
Use only radial-ply tires with
the wheels on the vehicle.
If the vehicle tires must be
replaced with a tire that does not
have a TPC Spec number, make
sure they are the same size,
GMC Acadia Limited Owner Manual (GMNA-Localizing-U.S.-10283134) -
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258 Vehicle Care
load range, speed rating, and
construction (radial) as the
original tires.
Vehicles that have a tire
pressure monitoring system
could give an inaccurate
low-pressure warning if non-TPC
Spec rated tires are installed.
SeeTire Pressure Monitor
System 0250.
The Tire and Loading
Information label indicates the
original equipment tires on the
vehicle. See Vehicle Load
Limits 0167.
Different Size Tires and
Wheels
If wheels or tires are installed that
are a different size than the original
equipment wheels and tires, vehicle
performance, including its braking,
ride and handling characteristics,
stability, and resistance to rollover
may be affected. If the vehicle has
electronic systems such as antilock
brakes, rollover airbags, roll bars, traction control, electronic stability
control, or All-Wheel Drive, the
performance of these systems can
also be affected.
{Warning
If different sized wheels are used,
there may not be an acceptable
level of performance and safety if
tires not recommended for those
wheels are selected. This
increases the chance of a crash
and serious injury. Only use GM
specific wheel and tire systems
developed for the vehicle, and
have them properly installed by a
GM certified technician.
See Buying New Tires 0256 and
Accessories and
Modifications 0209.
Uniform Tire Quality
Grading
The following information relates
to the system developed by the
United States National Highway Traffic Safety Administration
(NHTSA), which grades tires by
treadwear, traction, and
temperature performance. This
applies only to vehicles sold in
the United States. The grades
are molded on the sidewalls of
most passenger car tires. The
Uniform Tire Quality Grading
(UTQG) system does not apply
to deep tread, winter tires,
compact spare tires, tires with
nominal rim diameters of
10 to 12 inches (25 to 30 cm),
or to some limited-production
tires.
While the tires available on
General Motors passenger cars
and light trucks may vary with
respect to these grades, they
must also conform to federal
safety requirements and
additional General Motors Tire
Performance Criteria (TPC)
standards.
GMC Acadia Limited Owner Manual (GMNA-Localizing-U.S.-10283134) -
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Vehicle Care 259
Quality grades can be found
where applicable on the tire
sidewall between tread shoulder
and maximum section width. For
example:
Treadwear 200 Traction AA
Temperature A
All Passenger Car Tires Must
Conform to Federal Safety
Requirements In Addition To
These Grades.
Treadwear
The treadwear grade is a
comparative rating based on the
wear rate of the tire when tested
under controlled conditions on a
specified government test
course. For example, a tire
graded 150 would wear one and
one-half (1½) times as well on
the government course as a tire
graded 100. The relative
performance of tires depends
upon the actual conditions of
their use, however, and may
depart significantly from thenorm due to variations in driving
habits, service practices and
differences in road
characteristics and climate.
Traction
The traction grades, from
highest to lowest, are AA, A, B,
and C. Those grades represent
the tire's ability to stop on wet
pavement as measured under
controlled conditions on
specified government test
surfaces of asphalt and
concrete. A tire marked C may
have poor traction performance.
Warning: The traction grade
assigned to this tire is based on
straight-ahead braking traction
tests, and does not include
acceleration, cornering,
hydroplaning, or peak traction
characteristics.
Temperature
The temperature grades are A
(the highest), B, and C,
representing the tire's resistanceto the generation of heat and its
ability to dissipate heat when
tested under controlled
conditions on a specified indoor
laboratory test wheel. Sustained
high temperature can cause the
material of the tire to degenerate
and reduce tire life, and
excessive temperature can lead
to sudden tire failure. The grade
C corresponds to a level of
performance which all
passenger car tires must meet
under the Federal Motor Safety
Standard No. 109. Grades B and
A represent higher levels of
performance on the laboratory
test wheel than the minimum
required by law. Warning: The
temperature grade for this tire is
established for a tire that is
properly inflated and not
overloaded. Excessive speed,
underinflation, or excessive
loading, either separately or in
combination, can cause heat
buildup and possible tire failure.
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Vehicle Care 261
Tire Chains
{Warning
Do not use tire chains. There is
not enough clearance. Tire chains
used on a vehicle without the
proper amount of clearance can
cause damage to the brakes,
suspension, or other vehicle
parts. The area damaged by the
tire chains could cause loss of
control and a crash.
Use another type of traction
device only if its manufacturer
recommends it for the vehicle's
tire size combination and road
conditions. Follow that
manufacturer's instructions. To
avoid vehicle damage, drive slow
and readjust or remove the
traction device if it contacts the
vehicle. Do not spin the wheels.
If traction devices are used, install
them on the front tires.
If a Tire Goes Flat
It is unusual for a tire to blow out
while driving, especially if the tires
are maintained properly. SeeTires
0 242. If air goes out of a tire, it is
much more likely to leak out slowly.
But if there ever is a blowout, here
are a few tips about what to expect
and what to do:
If a front tire fails, the flat tire
creates a drag that pulls the vehicle
toward that side. Take your foot off
the accelerator pedal and grip the
steering wheel firmly. Steer to
maintain lane position, and then
gently brake to a stop, well off the
road, if possible.
A rear blowout, particularly on a
curve, acts much like a skid and
may require the same correction as
used in a skid. Stop pressing the
accelerator pedal and steer to
straighten the vehicle. It may be
very bumpy and noisy. Gently brake
to a stop, well off the road,
if possible.{Warning
Driving on a flat tire will cause
permanent damage to the tire.
Re-inflating a tire after it has been
driven on while severely
underinflated or flat may cause a
blowout and a serious crash.
Never attempt to re-inflate a tire
that has been driven on while
severely underinflated or flat.
Have your dealer or an authorized
tire service center repair or
replace the flat tire as soon as
possible.
{Warning
Lifting a vehicle and getting under
it to do maintenance or repairs is
dangerous without the
appropriate safety equipment and
training. If a jack is provided with
the vehicle, it is designed only for
changing a flat tire. If it is used for
anything else, you or others could
(Continued)
GMC Acadia Limited Owner Manual (GMNA-Localizing-U.S.-10283134) -
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270 Vehicle Care
4. Reinstall the wing bolt (2) byturning clockwise.
5. To replace the cover, line up the tab at the front of the cover
with the notch in the cover
opening. Push the cover in
place and make sure that the
rear clips are in the slots and
push the cover closed.
Store the center cap or the plastic
bolt-on wheel covers until a full size
tire is put back on the vehicle. When
you replace the compact spare with
a full-size tire, reinstall the bolt-on
wheel covers or the center cap.
Hand-tighten them over the wheel
nuts, using the wrench.
Compact Spare Tire
{Warning
Driving with more than one
compact spare tire at a time could
result in loss of braking and
handling. This could lead to a
crash and you or others could be
injured. Use only one compact
spare tire at a time. If this vehicle has a compact spare
tire, it was fully inflated when new;
however, it can lose air over time.
Check the inflation pressure
regularly. It should be 420 kPa
(60 psi).
Stop as soon as possible and check
that the spare tire is correctly
inflated after being installed on the
vehicle. The compact spare tire is
designed for temporary use only.
The vehicle will perform differently
with the spare tire installed and it is
recommended that the vehicle
speed be limited to 80 km/h (50
mph). To conserve the tread of the
spare tire, have the standard tire
repaired or replaced as soon as
convenient and return the spare tire
to the storage area.
When using a compact spare tire,
the ABS and Traction Control
systems may engage until the spare
tire is recognized by the vehicle,
especially on slippery roads. Adjust
driving to reduce possible
wheel slip.
Performance of the All-Wheel
Drive (AWD) system will be
automatically reduced to protect the
system when using the compact
spare. To restore the AWD and
prevent excessive wear on the
clutch in the AWD, replace the
compact spare tire with a full-size
tire as soon as possible.
Caution
When the compact spare is
installed, do not take the vehicle
through an automatic car wash
with guide rails. The compact
spare can get caught on the rails
which can damage the tire, wheel,
and other parts of the vehicle.
Do not use the compact spare on
other vehicles.
Do not mix the compact spare tire or
wheel with other wheels or tires.
They will not fit. Keep the spare tire
and its wheel together.
GMC Acadia Limited Owner Manual (GMNA-Localizing-U.S.-10283134) -
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330 Index
ControlTraction and Electronic
Stability . . . . . . . . . . . . . . . . . . . . . 184
Control of a Vehicle . . . . . . . . . . . . . 162
Convenience Net . . . . . . . . . . . . . . . . 95
Convex Mirrors . . . . . . . . . . . . . . . . . . 36
Coolant Engine . . . . . . . . . . . . . . . . . . . . . . . . 219
Engine Temperature Gauge . . 106
Engine TemperatureWarning Light . . . . . . . . . . . . . . . .113
Cooling System . . . . . . . . . . . . . . . . . 218 Engine Messages . . . . . . . . . . . . 125
Courtesy Lamps . . . . . . . . . . . . . . . . 146
Courtesy Transportation Program . . . . . . . . . . . . . . . . . . . . . . . 310
Cover Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Engine . . . . . . . . . . . . . . . . . . . . . . . . 213
Cruise Control . . . . . . . . . . . . . . . . . . 186 Light . . . . . . . . . . . . . . . . . . . . . . . . . . .115
Messages . . . . . . . . . . . . . . . . . . . . 124
Cupholders . . . . . . . . . . . . . . . . . . . . . . 92
Customer Assistance . . . . . . . . . . . 307 Offices . . . . . . . . . . . . . . . . . . . . . . . . 306
Text Telephone (TTY)
Users . . . . . . . . . . . . . . . . . . . . . . . 307 Customer Information
Service Publications
Ordering Information . . . . . . . . 313
Customer Satisfaction Procedure . . . . . . . . . . . . . . . . . . . . . 304
D
Damage Repair, Collision . . . . . . . 311
Danger, Warning, and Caution . . . . 2
Data CollectionInfotainment System . . . . . . . . . . 317
OnStar . . . . . . . . . . . . . . . . . . . . . . . 317
Data Recorders, Event . . . . . . . . . 316
Daytime Running Lamps/ Automatic Headlamp
System . . . . . . . . . . . . . . . . . . . . . . . . 144
Defensive Driving . . . . . . . . . . . . . . . 161
Delayed Entry Lighting . . . . . . . . . 148
Delayed Exit Lighting . . . . . . . . . . . 148
Delayed Headlamps . . . . . . . . . . . . 144
Delayed Locking . . . . . . . . . . . . . . . . . 29
Diagnostics
OnStar
®. . . . . . . . . . . . . . . . . . . . . . 322
Distracted Driving . . . . . . . . . . . . . . . 161
Dome Lamps . . . . . . . . . . . . . . . . . . . 146
Door Ajar Messages . . . . . . . . . . . . . . . 124
Delayed Locking . . . . . . . . . . . . . . . . 29
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Door (cont'd)
Power Locks . . . . . . . . . . . . . . . . . . . . 29
Drive Belt Routing, Engine . . . . . . 303
Drive Systems All-Wheel Drive . . . . . . . . . . 182, 228
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . 116
Driving Characteristics and
Towing Tips . . . . . . . . . . . . . . . . . 200
Defensive . . . . . . . . . . . . . . . . . . . . . 161
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . 161
For Better Fuel Economy . . . . . . . 22
Hill and Mountain Roads . . . . . . 165
If the Vehicle is Stuck . . . . . . . . . 167
Loss of Control . . . . . . . . . . . . . . . 163
Off-Road Recovery . . . . . . . . . . . 163
Vehicle Load Limits . . . . . . . . . . . 167
Wet Roads . . . . . . . . . . . . . . . . . . . 164
Winter . . . . . . . . . . . . . . . . . . . . . . . . 165
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . 151
E
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . . 207
Electrical System Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 233
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Index 337
T
Tachometer . . . . . . . . . . . . . . . . . . . . . 105
Text Telephone (TTY) Users . . . . 307
Theft-Deterrent Systems . . . . . . . . . 35Immobilizer . . . . . . . . . . . . . . . . . . . . . 35
Third-Row Seats . . . . . . . . . . . . . . . . . 51
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242 All-Season . . . . . . . . . . . . . . . . . . . . 243
Buying New Tires . . . . . . . . . . . . . 256
Chains . . . . . . . . . . . . . . . . . . . . . . . . 261
Changing . . . . . . . . . . . . . . . . . . . . . 262
Compact Spare . . . . . . . . . . . . . . . 270
Designations . . . . . . . . . . . . . . . . . 246
Different Size . . . . . . . . . . . . . . . . . 258
If a Tire Goes Flat . . . . . . . . . . . . 261
Inspection . . . . . . . . . . . . . . . . . . . . 254
Messages . . . . . . . . . . . . . . . . . . . . 130
Pressure Light . . . . . . . . . . . . . . . . .114
Pressure Monitor Operation . . 251
Pressure Monitor System . . . . . 250
Rotation . . . . . . . . . . . . . . . . . . . . . . 255
Sidewall Labeling . . . . . . . . . . . . . 244
Terminology and Definitions . . 247
Uniform Tire QualityGrading . . . . . . . . . . . . . . . . . . . . . 258
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . 260 Tires (cont'd)
Wheel Replacement . . . . . . . . . . 260
When It Is Time for New
Tires . . . . . . . . . . . . . . . . . . . . . . . . 256
Winter . . . . . . . . . . . . . . . . . . . . . . . . 243
Tow/Haul Mode . . . . . . . . . . . . . . . . . 181
Tow/Haul Mode Light . . . . . . . . . . . 112
Towing Driving Characteristics . . . . . . . . 200
Equipment . . . . . . . . . . . . . . . . . . . . 205
General Information . . . . . . . . . . 200
Recreational Vehicle . . . . . . . . . . 275
Trailer . . . . . . . . . . . . . . . . . . . . . . . . 203
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 274
Traction Control/Electronic Stability Control . . . . . . . . . . . . . . . 184
Trailer Towing . . . . . . . . . . . . . . . . . . . . . . . . 203
Transmission Automatic . . . . . . . . . . . . . . . . . . . . . 179
Fluid, Automatic . . . . . . . . . . . . . . 216
Messages . . . . . . . . . . . . . . . . . . . . 131
Transportation Program,
Courtesy . . . . . . . . . . . . . . . . . . . . . . 310
Turn and Lane-Change Signals . . . . . . . . . . . . . . . . . . . . . . . . 145
U
Uniform Tire Quality Grading . . . 258
Universal Remote System . . . . . . 139Operation . . . . . . . . . . . . . . . . . . . . . 141
Programming . . . . . . . . . . . . . . . . . 139
Using This Manual . . . . . . . . . . . . . . . . 2
V
Vehicle Alarm System . . . . . . . . . . . . . . . . . . 34
Canadian Owners . . . . . . . . . . . . . . . 2
Control . . . . . . . . . . . . . . . . . . . . . . . 162
Identification Number (VIN) . . . 301
Load Limits . . . . . . . . . . . . . . . . . . . 167
Messages . . . . . . . . . . . . . . . . . . . . 123
Personalization . . . . . . . . . . . . . . . 132
Reminder Messages . . . . . . . . . . 132
Remote Start . . . . . . . . . . . . . . . . . . . 27
Security . . . . . . . . . . . . . . . . . . . . . . . . 34
Speed Messages . . . . . . . . . . . . . 132
Towing . . . . . . . . . . . . . . . . . . . . . . . . 274
Vehicle Ahead Indicator . . . . . . . . 113
Vehicle Care Tire Pressure . . . . . . . . . . . . . . . . . 249
Vehicle Data Recording and Privacy . . . . . . . . . . . . . . . . . . . . . . . . 316
Ventilation, Air . . . . . . . . . . . . . . . . . . 158
Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . 40