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The rubber in tires ages over time.
This also applies to the spare tire,
if the vehicle has one, even if it is
never used. Multiple factors including
temperatures, loading conditions, and
inflation pressure maintenance affect
how fast aging takes place. GM
recommends that tires, including the
spare if equipped, be replaced after six
years, regardless of tread wear. The
tire manufacture date is the last four
digits of the DOT Tire Identification
Number (TIN) which is molded into
one side of the tire sidewall. The first
two digits represent the week (01–52)
and the last two digits, the year. For
example, the third week of the year
2010 would have a four-digit DOT
date of 0310.
Vehicle Storage
Tires age when stored normally
mounted on a parked vehicle. Park a
vehicle that will be stored for at least
a month in a cool, dry, clean area
away from direct sunlight to slow
aging. This area should be free of
grease, gasoline, or other substances
that can deteriorate rubber.Parking for an extended period can
cause flat spots on the tires that may
result in vibrations while driving.
When storing a vehicle for at least a
month, remove the tires or raise the
vehicle to reduce the weight from the
tires.
Buying New Tires
GM has developed and matched
specific tires for the vehicle. The
original equipment tires installed
were designed to meet General
Motors Tire Performance Criteria
Specification (TPC Spec) system
rating. When replacement tires are
needed, 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. See
Tire Sidewall
Labeling 0281.
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 0293. 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,
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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, 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. See Tire Pressure Monitor
System 0288. The Tire and Loading Information
label indicates the original
equipment tires on the vehicle.
See
Vehicle Load Limits 0184.
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, 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
(Continued)
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Warning (Continued)
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 0295 and
Accessories and Modifications 0251.
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.
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 the norm
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
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298 VEHICLE CARE
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 resistance to 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 theFederal 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.
Wheel Alignment and Tire
Balance
The tires and wheels were aligned and
balanced at the factory to provide the
longest tire life and best overall
performance. Adjustments to wheel
alignment and tire balancing are not
necessary on a regular basis. Consider
an alignment check if there is unusual
tire wear or the vehicle is significantly
pulling to one side or the other. Some
slight pull to the left or right,
depending on the crown of the road
and/or other road surface variations such as troughs or ruts, is normal.
If the vehicle is vibrating when driving
on a smooth road, the tires and
wheels may need to be rebalanced.
See your dealer for proper diagnosis.
Wheel Replacement
Replace any wheel that is bent,
cracked, or badly rusted or corroded.
If wheel nuts keep coming loose, the
wheel, wheel bolts, and wheel nuts
should be replaced. If the wheel leaks
air, replace it. Some aluminum wheels
can be repaired. See your dealer if any
of these conditions exist.
Your dealer will know the kind of
wheel that is needed.
Each new wheel should have the same
load-carrying capacity, diameter,
width, offset, and be mounted the
same way as the one it replaces.
Replace wheels, wheel bolts, wheel
nuts, or Tire Pressure Monitor System
(TPMS) sensors with new GM original
equipment parts.
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{Warning
Using the wrong replacement
wheels, wheel bolts, or wheel nuts
can be dangerous. It could affect
the braking and handling of the
vehicle. Tires can lose air, and
cause loss of control, causing a
crash. Always use the correct wheel,
wheel bolts, and wheel nuts for
replacement.
Caution
The wrong wheel can also cause
problems with bearing life, brake
cooling, speedometer or odometer
calibration, headlamp aim, bumper
height, vehicle ground clearance,
and tire or tire chain clearance to
the body and chassis.
Used Replacement Wheels
{Warning
Replacing a wheel with a used one
is dangerous. How it has been used
or how far it has been driven may
be unknown. It could fail suddenly
and cause a crash. When replacing
wheels, use a new GM original
equipment wheel.
Tire Chains
{Warning
If the vehicle has a tire size other
than 235/65R18, 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(Continued)
Warning (Continued)
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.
Caution
If the vehicle is equipped with 235/
65R18 size tires, use tire chains
only where legal and only when
necessary. Use low profile chains
that add no more than 12 mm
thickness to the tire tread and inner
sidewall. Use chains that are the
proper size for the tires. Install
them on the tires of the front axle.
(Continued)
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6. Route the strap hook through thewheel, as shown.
7. Attach the strap to the other cargo tie-down in the rear of the
vehicle.
8. Tighten the strap and secure it using the buckle.
The compact spare is for temporary
use only. Replace the compact spare
tire with a full-size tire as soon as
you can.
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
AWD (if equipped), 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.
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.
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370 INDEX
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Cluster, Instrument . . . . . . . . . . . .123, 125
Collision Damage Repair . . . . . . . . . . . 350
Compact Spare Tire . . . . . . . . . . . . . . . . . 313
CompartmentsStorage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Compressor Kit, Tire Sealant . . . . . . . 301
Connections
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360
Control
Traction and ElectronicStability . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Control of a Vehicle . . . . . . . . . . . . . . . . 179
Convenience Net . . . . . . . . . . . . . . . . . . . . 111
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . 49
Coolant Engine Temperature Gauge . . . . . . 129
Engine Temperature WarningLight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Cooling . . . . . . . . . . . . . . . . . . . . . . . . .168, 173
Cooling System . . . . . . . . . . . . . . . . . . . . . 258
Cornering Lamps . . . . . . . . . . . . . . . . . . . 164
Courtesy Lamps . . . . . . . . . . . . . . . . . . . . . 164
Courtesy Transportation
Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349
Cover Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Cruise Control . . . . . . . . . . . . . . . . . . . . . . . 208
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Cruise Control, Adaptive . . . . . . . . . . . 210
Cupholders . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Customer Assistance . . . . . . . . . . . . . . . 345 Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345
Text Telephone (TTY) Users . . . . . 345
Customer Information Service Publications OrderingInformation . . . . . . . . . . . . . . . . . . . . . . 352
Customer Satisfaction
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 343
D
Damage Repair, Collision . . . . . . . . . . . 350
Danger, Warning, and Caution . . . . . . . . 3
Data CollectionInfotainment System . . . . . . . . . . . . . 356
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Data Recorders, Event . . . . . . . . . . . . . . 355
Daytime Running Lamps (DRL) . . . 162
Defensive Driving . . . . . . . . . . . . . . . . . . . 179
Delayed Locking . . . . . . . . . . . . . . . . . . . . . 39
Diagnostics OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362
Distracted Driving . . . . . . . . . . . . . . . . . . 178
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . 164 Door
Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . 141
Delayed Locking . . . . . . . . . . . . . . . . . . . . 39
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . 39
Drive Belt Routing, Engine . . . . . . . . . 342
Drive Systems All-Wheel Drive . . . . . . . . . . . . . . 201, 266
Driver Assistance Systems . . . . . . . . . 219
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . . . . . . 141
Driver Mode Control . . . . . . . . . . . . . . . . 207
Driving Assistance Systems . . . . . . . . . . . . . . . 226
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . . . . . 240
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
For Better Fuel Economy . . . . . . . . . . . 25
Hill and Mountain Roads . . . . . . . . 182
If the Vehicle is Stuck . . . . . . . . . . . . 184
Loss of Control . . . . . . . . . . . . . . . . . . . . 181
Off-Road Recovery . . . . . . . . . . . . . . . . 180
Vehicle Load Limits . . . . . . . . . . . . . . 184
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . 181
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . . . . . 168
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INDEX 373
L
Labeling, Tire Sidewall . . . . . . . . . . . . . 281
LampsCornering . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Daytime Running (DRL) . . . . . . . . . . 162
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Exterior Controls . . . . . . . . . . . . . . . . . . 160
Exterior Lamps Off Reminder . . . . 162
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Malfunction Indicator (Check Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . 133
On Reminder . . . . . . . . . . . . . . . . . . . . . . 140
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Lane Change Alert (LCA) . . . . . . . . . . . 232
Lane Departure Warning (LDW) . . . . . . . . . . . . . . . . . . . 234
Lane Keep Assist (LKA) . . . . . . . . . . . . 234
Lane Keep Assist Light . . . . . . . . . . . . . 136
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . 71
LATCH System
Replacing Parts after a Crash . . . . 101
LATCH, Lower Anchors and
Tethers for Children . . . . . . . . . . . . . . . 96
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . 270
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Lighter, Cigarette . . . . . . . . . . . . . . . . . . . 121 Lighting
Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Illumination Control . . . . . . . . . . . . . . 164
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Lights Airbag Readiness . . . . . . . . . . . . . . . . . 131
Antilock Brake System (ABS)
Warning . . . . . . . . . . . . . . . . . . . . . . . . . 136
Brake System Warning . . . . . . . . . . . 135
Charging System . . . . . . . . . . . . . . . . . . 133
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 133
Cruise Control . . . . . . . . . . . . . . . . . . . . . 141
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Electric Parking Brake . . . . . . . . . . . . 135
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . 138
Engine Oil Pressure . . . . . . . . . . . . . . . 139
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 162
High-Beam On . . . . . . . . . . . . . . . . . . . . 140
High/Low Beam Changer . . . . . . . . . 162
Lane Keep Assist . . . . . . . . . . . . . . . . . . 136
Low Fuel Warning . . . . . . . . . . . . . . . . 140
Seat Belt Reminders . . . . . . . . . . . . . . 131
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Service Electric Parking Brake . . . 136
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . 138 Lights (cont'd)
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 139
Traction Control System
(TCS)/StabiliTrak . . . . . . . . . . . . . . . . 138
Traction Off . . . . . . . . . . . . . . . . . . . . . . . 137
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . . 39
Delayed Locking . . . . . . . . . . . . . . . . . . . . 39
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Lockout Protection . . . . . . . . . . . . . . . . . 39
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Loss of Control . . . . . . . . . . . . . . . . . . . . . . 181
Low Fuel Warning Light . . . . . . . . . . . 140
Lower Anchors and Tethers for Children (LATCH System) . . . . . . . . . 96
Lumbar Adjustment . . . . . . . . . . . . . . . . . 61 Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 61
M
Maintenance
Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339
Maintenance and Care Additional . . . . . . . . . . . . . . . . . . . . . . . . . 334
Maintenance Schedule . . . . . . . . . . . . . 330 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . . . . . 337
Malfunction Indicator Lamp . . . . . . . 133