If you must replace your vehicle’s tires with those
that do not have a TPC Spec number, make
sure they are the same size, load range, speed
rating, and construction type (radial and
bias-belted tires) as your vehicle’s original tires.
Your vehicle’s original equipment tires are listed
on the Tire and Loading Information label.
This label is attached to the vehicle’s center pillar
(B-pillar). SeeLoading Your Vehicle on page 226,
for more information about the Tire and Loading
Information label.
Different Size Tires and Wheels
If you add wheels or tires that are a different size
than your original equipment wheels and tires, this
may 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, traction control, and electronic
stability control, the performance of these systems
can be affected.
{CAUTION:
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 speci c wheel and
tire systems developed for your vehicle,
and have them properly installed by a
GM certi ed technician.
SeeBuying New Tires on page 296and
Accessories and Modi cations on page 235
for additional information.
297
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. 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.
Treadwear
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a speci ed
government test course. For example, a tire
graded 150 would wear one and a half (1.5) 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 signi cantly 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 speci ed
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.
298
Tire Chains
{CAUTION:
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 your vehicle
and you or others may be injured in a
crash. Use another type of traction device
only if its manufacturer recommends
it for use on your vehicle and tire size
combination and road conditions. Follow
that manufacturer’s instructions. To help
avoid damage to your vehicle, drive slowly,
re-adjust or remove the device if it is
contacting your vehicle, and do not spin
your wheels. If you do nd traction devices
that will t, install them on the rear tires.
If a Tire Goes Flat
Your vehicle has a tire in ator kit. There is no
spare tire, no tire changing equipment, and
no place to store a tire.
It is unusual for a tire to blow out while you are
driving, especially if you maintain your tires
properly. SeeTires on page 284. If air goes out
of a tire, it is much more likely to leak out slowly.
But, if you should ever have a blow out, 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 blow out, particularly on a curve, acts much
like a skid and may require the same correction
you would use in a skid. In any rear blow out,
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.
302
Instrument Panel
Overview.................................................. 108
Instrument Panel (I/P)
Brightness................................................ 120
Cluster..................................................... 128
J
Jump Starting.............................................. 274
K
Keyless Entry System................................... 61
Keys............................................................. 60
L
Labeling, Tire Sidewall................................. 286
Lamps
Battery Run-Down Protection................... 121
Fog .......................................................... 120
Mirror Reading......................................... 120
LATCH System
Child Restraints......................................... 37
Latches, Seatback......................................... 11License Plate Lamps................................... 282
Lift Seat, Power............................................ 12
Light
Airbag Readiness..................................... 131
Anti-Lock Brake System Warning............. 135
Brake System Warning............................. 134
Charging System..................................... 134
Electronic Stability Control........................ 136
Engine Coolant Temperature Warning....... 137
Highbeam On.......................................... 143
Low Coolant Warning............................... 138
Low Fuel Warning.................................... 145
Malfunction Indicator................................ 138
Oil Pressure............................................. 142
Passenger Airbag Status Indicator............ 132
Passenger Safety Belt Reminder.............. 130
Reduced Engine Power............................ 143
Safety Belt Reminder............................... 130
Security................................................... 143
Service Vehicle Soon............................... 144
Traction Control System........................... 136
Trunk Ajar................................................ 144
Lighting
Entry/Exit................................................. 120
Limited-Slip Rear Axle................................. 200
389