(B) Tire Width:The three-digit number indicates
the tire section width in millimeters from sidewall
to sidewall.
(C) Aspect Ratio:A two-digit number that
indicates the tire height-to-width measurements.
For example, if the tire size aspect ratio is
60, as shown in item C of the illustration, it would
mean that the tire’s sidewall is 60 percent as
high as it is wide.
(D) Construction Code:A letter code is used to
indicate the type of ply construction in the tire.
The letter R means radial ply construction;
the letter D means diagonal or bias ply
construction; and the letter B means belted-bias
ply construction.
(E) Rim Diameter:Diameter of the wheel in
inches.
(F) Service Description:These characters
represent the load range and speed rating of the
tire. The load index represents the load carry
capacity a tire is certi ed to carry. The load index
can range from 1 to 279. The speed rating is
the maximum speed a tire is certi ed to carry a
load. Speed ratings range from A to Z.Tire Terminology and De nitions
Air Pressure:The amount of air inside the tire
pressing outward on each square inch of the
tire. Air pressure is expressed in pounds
per square inch (psi) or kilopascal (kPa).
Accessory Weight:This means the combined
weight of optional accessories. Some examples of
optional accessories are, automatic
transmission/transaxle, power steering, power
brakes, power windows, power seats, and
air conditioning.
Aspect Ratio:The relationship of a tire’s height
to its width.
Belt:A rubber coated layer of cords that is
located between the plies and the tread. Cords
may be made from steel or other reinforcing
materials.
Bead:The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the rim.
Bias Ply Tire:A pneumatic tire in which the plies
are laid at alternate angles less than 90 degrees
to the centerline of the tread.
404
Notice:If your vehicle has a tire size other
than P255/50R20 use tire chains only where
legal and only when you must. Use chains that
are the proper size for your tires. Install
them on the tires of the rear axle. Do not use
chains on the tires of the front axle. Tighten
them as tightly as possible with the ends
securely fastened. Drive slowly and follow the
chain manufacturer’s instructions. If you
can hear the chains contacting your vehicle,
stop and retighten them. If the contact
continues, slow down until it stops. Driving
too fast or spinning the wheels with chains on
will damage your vehicle.If a Tire Goes Flat
It is unusual for a tire to blowout while you are
driving, especially if you maintain your vehicle’s
tires properly. If air goes out of a tire, it is
much more likely to leak out slowly. But if you
should ever have a blowout, here are a few tips
about what to expect and what to do:
If a front tire fails, the at tire will create a drag
that pulls the vehicle toward that side. Take your
foot off the accelerator pedal and grip the
steering wheel rmly. Steer to maintain lane
position, and then gently brake to a stop well out
of the traffic lane.
A rear blowout, particularly on a curve, acts much
like a skid and may require the same correction
you would use in a skid. In any rear blowout
remove your foot from the accelerator pedal. Get
the vehicle under control by steering the way
you want the vehicle to go. It may be very bumpy
and noisy, but you can still steer. Gently brake
to a stop, well off the road if possible.
423
Rear Underseat Fuse Block
(Left Side)
The left side rear fuse block is located under the
rear seat on the left side of the vehicle. The carpet
must be lifted up to access the rear fuse block.
To access the fuse block, push in the two tabs
located at each end of the fuse block cover.
Then lift the cover off.
Relays Usage
STOP RELAY
MININot Used
ELC RELAY
MINIElectronic Level Control (ELC)
Compressor Motor
PRK LAMP
RELAY MICROLicense Lamps
REAR FOG
LAMP RLY
MICRONot Used
SPARE Spare
R POSITION
RELAY MICRONot Used
LH POS PRK
LAMP RELAY
MICROFront & Rear Park Lamps
SPARE Not Used
Mini Fuses Usage
SWC Steering Wheel Controls
RSA/RSERear Seat Entertainment, Rear Seat
Audio
ONSTAR
TV/XMOnStar
®Module, XM Radio
3RD ROW
SW/RFAFlip Fold Seat Switches, Remote
Keyless Entry System Module
AMP Audio Ampli er
460
If your vehicle is equipped with StabiliTrak®,
steering performance, including yaw rate, steering
wheel angle, and lateral acceleration, is also
recorded. This information has been used
to improve vehicle crash performance and may be
used to improve crash performance of future
vehicles and driving safety. Unlike the data
recorders on many airplanes, these on-board
systems do not record sounds, such as
conversation of vehicle occupants.
To read this information, special equipment is
needed and access to the vehicle or the device
that stores the data is required. GM will not access
information about a crash event or share it with
others other than:
with the consent of the vehicle owner or, if the
vehicle is leased, with the consent of the
lessee,
in response to an official request of police or
similar government office,
as part of GM’s defense of litigation through
the discovery process, or
as required by law.In addition, once GM collects or receives data,
GM may:
use the data for GM research needs,
make it available for research where
appropriate con dentiality is to be maintained
and need is shown, or
share summary data which is not tied to a
speci c vehicle with non-GM organizations
for research purposes.
Others, such as law enforcement, may have
access to the special equipment that can read the
information if they have access to the vehicle
or the device that stores the data.
If your vehicle has OnStar
®, please check the
OnStar®subscription service agreement or manual
for information on its operations and data
collection.
499
Appearance Care (cont.)
Tires........................................................ 450
Underbody Maintenance........................... 451
Vehicle Care/Appearance Materials.......... 452
Washing Your Vehicle.............................. 447
Weatherstrips........................................... 447
Windshield and Wiper Blades................... 449
Wood Panels........................................... 447
Ashtray(s).................................................... 187
Audio System(s).......................................... 240
Audio Steering Wheel Controls................. 269
Care of Your CD Player........................... 271
Care of Your CDs.................................... 271
Diversity Antenna System......................... 272
Navigation/Radio System,
see Navigation Manual......................... 266
Radio with CD......................................... 246
Rear Seat Audio (RSA)............................ 266
Setting the Time..............................242, 244
Theft-Deterrent Feature............................ 268
Understanding Radio Reception............... 270
XM™ Satellite Radio Antenna System...... 272
Automatic Transmission
Fluid........................................................ 367
Operation................................................. 122B
Battery........................................................ 385
Electric Power Management..................... 183
Exterior Lighting Battery Saver................. 181
Before Leaving on a Long Trip.................... 313
Brake
Anti-Lock Brake System (ABS)................. 279
Emergencies............................................ 281
Panic Assist............................................. 284
Parking.................................................... 127
System Warning Light.............................. 204
Brake Pedal, Throttle................................... 120
Brakes........................................................ 381
Braking....................................................... 278
Braking in Emergencies............................... 281
Break-In, New Vehicle................................. 116
Bulb Replacement....................................... 396
Halogen Bulbs......................................... 396
High Intensity Discharge (HID)
Lighting................................................ 396
Buying New Tires........................................ 416
508
Steering Wheel Controls, Audio................... 269
Steering Wheel, Tilt Wheel.......................... 166
Storage Areas
Cargo Management System..................... 155
Cell Phone Storage Area......................... 154
Center Console Storage Area................... 154
Cupholder(s)............................................ 154
Glove Box................................................ 153
Luggage Carrier....................................... 154
Stowable Seat............................................... 20
Stuck in Sand, Mud, Ice, or Snow............... 321
Sun Visors.................................................. 112
Sunroof..............................................156, 158
T
Tachometer................................................. 199
TCS Warning Light...................................... 206
Theft-Deterrent, Radio................................. 268
Theft-Deterrent System................................ 112
Theft-Deterrent Systems.............................. 112
PASS-Key
®III+........................................ 114
PASS-Key®III+ Operation........................ 114
Throttle, Adjustable...................................... 120Tilt Wheel.................................................... 166
Time, Setting......................................242, 244
Tire
Pressure Light.......................................... 207
Tires........................................................... 398
Aluminum or Chrome-Plated
Wheels, Cleaning.................................. 449
Buying New Tires..................................... 416
Chains..................................................... 422
Changing a Flat Tire................................ 424
Cleaning.................................................. 450
Compact Spare Tire................................. 442
Different Size........................................... 418
High-Speed Operation.............................. 409
If a Tire Goes Flat................................... 423
In ation - Tire Pressure............................ 407
Inspection and Rotation............................ 414
Installing the Spare Tire........................... 429
Pressure Monitor System ......................... 410
Removing the Flat Tire............................. 429
Removing the Spare Tire and Tools......... 426
Secondary Latch System ......................... 436
Storing a Flat or Spare Tire and Tools..... 439
Tire Sidewall Labeling.............................. 401
520