traction control GMC TERRAIN 2010 Owner's Guide

9-60 Vehicle Care
The vehicle needs new tires if any
of the following statements are true:
.You can see the indicators at
three or more places around
the tire.
.You can see cord or fabric
showing through the tire's
rubber.
.The tread or sidewall is cracked,
cut, or snagged deep enough to
show cord or fabric.
.The tire has a bump, bulge,
or split.
.The tire has a puncture, cut,
or other damage that cannot be
repaired well because of the size
or location of the damage.
The rubber in tires degrades over
time. This is also true for the spare
tire, if the vehicle has one, even
if it is not being used. Multiple
conditions affect how fast this aging
takes place, including temperatures,
loading conditions, and inflation
pressure maintenance. With proper
care and maintenance tires typically wear out before they degrade due to
age. If you are unsure about the
need to replace the tires as they get
older, consult the tire manufacturer
for more information.
Buying New Tires
GM has developed and matched
specific tires for your vehicle.
The original equipment tires
installed on your vehicle,
when it was new, were designed
to meet General Motors Tire
Performance Criteria
Specification (TPC Spec)
system rating. If you need
replacement tires, GM strongly
recommends that you get tires
with the same TPC Spec rating.
This way, your vehicle will
continue to have tires that are
designed to give the same
performance and vehicle safety,
during normal use, as the
original tires.
GM's exclusive TPC Spec
system considers over a dozen
critical specifications that impact
the overall performance of your
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 an MS for
mud and snow. See
Tire
Sidewall Labeling
on page 9‑46
for additional information.
GM recommends replacing tires
in sets of four. This is because
uniform tread depth on all tires
will help keep your vehicle
performing most like it did when
the tires were new. Replacing
less than a full set of tires can
affect the braking and handling
performance of your vehicle.

9-62 Vehicle Care
Different Size Tires and
Wheels
If you add wheels or tires that are a
different size than your original
equipment wheels and tires, this
could affect the way your vehicle
performs, including its braking, ride
and handling characteristics,
stability, and resistance to rollover.
Additionally, if your vehicle has
electronic systems such as anti‐lock
brakes, rollover airbags, traction
control, and electronic stability
control, the performance of these
systems can be affected.
{WARNING
If you add different sized wheels,
your vehicle may not provide an
acceptable level of performance
and safety if tires not
recommended for those wheels
are selected. You may increase
the chance that you will crash and
suffer serious injury. Only use GM
specific wheel and tire systems
developed for your vehicle, and
have them properly installed by a
GM certified technician.
See Buying New Tires
on
page 9‑60and Accessories and
Modificationson page 9‑3for
additional information.
Uniform Tire Quality
Grading
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
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.

Vehicle Care 9-63
The Uniform Tire Quality
Grading (UTQG) system does
not apply to deep tread,
winter-type snow tires,
space-saver, or temporary use
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.
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
a 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
–AA, A, B, C
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.

9-66 Vehicle Care
Used Replacement Wheels
{WARNING
Putting a used wheel on the
vehicle is dangerous. You cannot
know how it has been used or
how far it has been driven.
It could fail suddenly and cause a
crash. If you have to replace a
wheel, use a new GM original
equipment wheel.
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 you to lose
control of the vehicle and you or
others may be injured in a crash.(Continued)
WARNING (Continued)
Use another type of traction
device only if its manufacturer
recommends it for use on the
vehicle and tire size combination
and road conditions. Follow that
manufacturer's instructions. To
help avoid damage to the vehicle,
drive slowly, readjust or remove
the device if it is contacting the
vehicle, and do not spin the
vehicle's wheels. If you do find
traction devices that will fit, install
them on the front tires.

INDEX i-7
Lights (cont.)Fog Lamps . . . . . . . . . . . . . . . . . . . 4-25
Fuel Economy . . . . . . . . . . . . . . . . 4-23
High-Beam On . . . . . . . . . . . . . . . . 4-24
High/Low Beam Changer . . . . . . 5-2
Low Fuel Warning . . . . . . . . . . . . 4-24
Safety Belt Reminders . . . . . . . . 4-14
Security . . . . . . . . . . . . . . . . . . . . . . 4-24
Tire Pressure . . . . . . . . . . . . . . . . . 4-22
Traction Control System
(TCS)/StabiliTrak
®. . . . . . . . . . 4-21
Traction Off . . . . . . . . . . . . . . . . . . . 4-21
Locks Door . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Power Door . . . . . . . . . . . . . . . . . . . . 1-7
Safety . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Loss of Control . . . . . . . . . . . . . . . . . 8-7
Low Fuel Warning Light . . . . . . . . 4-24
Lower Anchors and Tethers for Children (LATCH
SYSTEM) . . . . . . . . . . . . . . . . . . . . 2-49
Lumbar Adjustment . . . . . . . . . . . . . 2-5 Front Seats . . . . . . . . . . . . . . . . . . . . 2-5
M
Maintenance
Records . . . . . . . . . . . . . . . . . . . . 10-10
Maintenance Schedule Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . 10-7
Scheduled Maintenance . . . . . . 10-2
Malfunction Indicator Lamp . . . . 4-17
Manual Mode . . . . . . . . . . . . . . . . . . 8-37
Mass Storage Media (MEM) . . . 6-24
Messages Airbag System . . . . . . . . . . . . . . . . 4-34
Anti-Theft Alarm System . . . . . . 4-34
Battery Voltage andCharging . . . . . . . . . . . . . . . . . . . . 4-29
Brake System . . . . . . . . . . . . . . . . 4-30
Compass . . . . . . . . . . . . . . . . . . . . . 4-30
Door Ajar . . . . . . . . . . . . . . . . . . . . . 4-30
Engine Cooling System . . . . . . . 4-31
Engine Oil . . . . . . . . . . . . . . . . . . . . 4-31
Engine Power . . . . . . . . . . . . . . . . 4-32
Fuel System . . . . . . . . . . . . . . . . . . 4-32 Messages (cont.)
Key and Lock . . . . . . . . . . . . . . . . . 4-33
Object Detection System . . . . . 4-33
Ride Control System . . . . . . . . . . 4-33
Safety Belt . . . . . . . . . . . . . . . . . . . . 4-34
Service Vehicle . . . . . . . . . . . . . . . 4-34
Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-35
Transmission . . . . . . . . . . . . . . . . . 4-35
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 4-29
Vehicle Reminder . . . . . . . . . . . . . 4-36
Washer Fluid . . . . . . . . . . . . . . . . . 4-36
Mirrors Automatic DimmingRearview . . . . . . . . . . . . . . . . . . . . 1-16
Convex . . . . . . . . . . . . . . . . . . . . . . . 1-14
Heated . . . . . . . . . . . . . . . . . . . . . . . 1-15
Park Tilt . . . . . . . . . . . . . . . . . . . . . . 1-15
Power . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Monitor System, Tire Pressure . . . . . . . . . . . . . . . . . . . . . 9-53
Multi-Band Antenna . . . . . . . . . . . . 6-18

INDEX i-11
Starter Switch Check . . . . . . . . . . 9-26
Starting the Engine . . . . . . . . . . . . 8-29
Steering . . . . . . . . . . . . . . . . . . . . . . . . 8-5Fluid, Power . . . . . . . . . . . . . . . . . . 9-21
Wheel Adjustment . . . . . . . . . . . . . 4-6
Wheel Controls . . . . . . . . . . . . . . . . 4-6
Stoplamps and Back-Up Lamps
Bulb Replacement . . . . . . . . . . . . 9-34
Storage Mass Media (MEM) . . . . . . . . . . . 6-24
Storage Areas
Center Console . . . . . . . . . . . . . . . . 3-1
Convenience Net . . . . . . . . . . . . . . 3-2
Glove Box . . . . . . . . . . . . . . . . . . . . . 3-1
Instrument Panel . . . . . . . . . . . . . . 3-1
Roof Rack System . . . . . . . . . . . . . 3-2
Stuck Vehicle . . . . . . . . . . . . . . . . . . 8-22
Sun Visors . . . . . . . . . . . . . . . . . . . . . 1-18
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 1-19
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . iv
System Roof Rack . . . . . . . . . . . . . . . . . . . . . 3-2
System Check Automatic TransmissionShiftlock Control . . . . . . . . . . . . 9-27T
Tachometer . . . . . . . . . . . . . . . . . . . . 4-13
Taillamps
Bulb Replacement . . . . . . . . . . . . 9-34
Text Telephone (TTY) Users . . . 12-4
Theft-Deterrent Systems . . . . . . . 1-13 Immobilizer . . . . . . . . . . . . . . . . . . . 1-13
Time . . . . . . . . . . . . . . . . . . . . . . 4-9, 4-10
Tires Buying New Tires . . . . . . . . . . . . . 9-60
Chains . . . . . . . . . . . . . . . . . . . . . . . . 9-66
Changing . . . . . . . . . . . . . . . . . . . . . 9-69
Compact Spare . . . . . . . . . . . . . . . 9-76
Designations . . . . . . . . . . . . . . . . . 9-48
Different Size . . . . . . . . . . . . . . . . . 9-62
If a Tire Goes Flat . . . . . . . . . . . . 9-67
Inflation Monitor System . . . . . . 9-55
Inspection . . . . . . . . . . . . . . . . . . . . 9-58
Messages . . . . . . . . . . . . . . . . . . . . 4-35
Pressure Light . . . . . . . . . . . . . . . . 4-22
Pressure Monitor System . . . . . 9-53
Rotation . . . . . . . . . . . . . . . . . . . . . . 9-58
Sidewall Labeling . . . . . . . . . . . . . 9-46
Terminology andDefinitions . . . . . . . . . . . . . . . . . . . 9-49 Tires (cont.)
Uniform Tire Quality
Grading . . . . . . . . . . . . . . . . . . . . . 9-62
Wheel Alignment and Tire
Balance . . . . . . . . . . . . . . . . . . . . . 9-64
Wheel Replacement . . . . . . . . . . 9-65
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 9-59
Towing
Driving Characteristics . . . . . . . . 8-58
Equipment . . . . . . . . . . . . . . . . . . . . 8-65
General Information . . . . . . . . . . 8-58
Recreational Vehicle . . . . . . . . . . 9-81
Trailer . . . . . . . . . . . . . . . . . . . . . . . . 8-62
Trailer Sway Control (TSC) . . . 8-66
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 9-81
Traction Control System (TCS) . . . . . . . . 8-41
Control System (TCS)/
StabiliTrak
®Light . . . . . . . . . . . . 4-21
Off Light . . . . . . . . . . . . . . . . . . . . . . 4-21
Trailer Sway Control (TSC) . . . . . . . . . . 8-66
Trailer Towing . . . . . . . . . . . . . . . . . 8-62