Speed Rating:An alphanumeric
code assigned to a tire indicating
the maximum speed at which a
tire can operate.
Traction
:The friction between
the tire and the road surface.
The amount of grip provided.
Tread
:The portion of a tire that
comes into contact with the road.
Treadwear Indicators
:Narrow
bands, sometimes called wear
bars, that show across the tread
of a tire when only 1/16 inch
(1.6 mm) of tread remains.
SeeWhen It Is Time for New
Tires on page 9-62.
UTQGS (Uniform Tire Quality
Grading Standards)
:A tire
information system that provides
consumers with ratings for a
tire’s traction, temperature,
and treadwear. Ratings are
determined by tire manufacturers
using government testingprocedures. The ratings are
molded into the sidewall of the
tire. SeeUniform Tire Quality
Grading on page 9-65.
Vehicle Capacity Weight
:The number of designated
seating positions multiplied by
150 lbs (68 kg) plus the rated
cargo load. SeeVehicle Load
Limits on page 8-12.
Vehicle Maximum Load on the
Tire
:Load on an individual tire
due to curb weight, accessory
weight, occupant weight, and
cargo weight.
Vehicle Placard
:A label
permanently attached to a
vehicle showing the vehicle’s
capacity weight and the original
equipment tire size and
recommended inflation pressure.
See “Tire and Loading
Information Label” underVehicle
Load Limits on page 8-12.
Tire Pressure
Tires need the correct amount
of air pressure to operate
effectively.
Notice:Do not let anyone
tell you that under-in ation or
over-in ation is all right. It is
not. If your tires do not have
enough air (under-in ation),
you can get the following:
Too much exing
Too much heat
Tire overloading
Premature or irregular wear
Poor handling
Reduced fuel economy
If your tires have too much air
(over-in ation), you can get
the following:
Unusual wear
Poor handling
Rough ride
Needless damage from road
hazards
9-54 Vehicle Care
Tire Pressure for
High-Speed Operation
{WARNING
Driving at high speeds, 100 mph
(160 km/h) or higher, puts an
additional strain on tires. Sustained
high-speed driving causes
excessive heat build up and
can cause sudden tire failure.
You could have a crash and you
or others could be killed. Some
high-speed rated tires require
inflation pressure adjustment for
high speed operation. When speed
limits and road conditions are such
that a vehicle can be driven at high
speeds, make sure the tires are
rated for high speed operation, in
excellent condition, and set to the
correct cold tire inflation pressure
for the vehicle load.Vehicles with 245/45ZR20 103Y,
P245/50ZR19 104W and
275/40ZR20 106Y size tires,
have tires capable of high speed
use. Make sure the tires are inflated
to the recommended cold inflation
pressures before operating the
vehicle at speeds over 100 mph
(160 km/h). SeeVehicle Load Limits
on page 8-12andTire Pressure on
page 9-54.
Tire Pressure Monitor
System
The Tire Pressure Monitor System
(TPMS) uses radio and sensor
technology to check tire pressure
levels. The TPMS sensors monitor
the air pressure in your vehicle’s tires
and transmit tire pressure readings
to a receiver located in the vehicle.
Each tire, including the spare
(if provided), should be checked
monthly when cold and inflated to
the inflation pressure recommended
by the vehicle manufacturer on thevehicle placard or tire inflation
pressure label. (If your vehicle has
tires of a different size than the size
indicated on the vehicle placard or
tire inflation pressure label, you
should determine the proper tire
inflation pressure for those tires.)
As an added safety feature, your
vehicle has been equipped with a
tire pressure monitoring system
(TPMS) that illuminates a low tire
pressure telltale when one or
more of your tires is significantly
under-inflated.
Accordingly, when the low tire
pressure telltale illuminates, you
should stop and check your tires as
soon as possible, and inflate them
to the proper pressure. Driving on
a significantly under-inflated tire
causes the tire to overheat and can
lead to tire failure. Under-inflation
also reduces fuel efficiency and
tire tread life, and may affect the
vehicle’s handling and stopping
ability.
9-56 Vehicle Care
•Restraint system component
check. SeeSafety System Check
on page 2-20.
•Automatic transmission fluid level
check and adding fluid, if needed.
SeeAutomatic Transmission
Fluid on page 9-14.
•Rear axle fluid level check and
adding fluid, if needed. SeeRear
Axle on page 9-30.
•Engine air cleaner filter
inspection. SeeEngine Air
Cleaner/Filter on page 9-16.
•Passenger compartment air filter
replacement (or every 12 months,
whichever occurs first). More
frequent replacement may be
required if vehicle is driven
regularly under dusty conditions.
Additional Required Services
At Each Fuel Stop
•Engine oil level check.
SeeEngine Oil on page 9-10.
•Engine coolant level check.
SeeEngine Coolant on
page 9-19.
•Windshield washer fluid level
check. SeeWasher Fluid on
page 9-26.
Once a Month
•Tire inflation check. SeeTire
Pressure on page 9-54.
•Tire wear inspection. SeeTire
Inspection on page 9-61.Once a Year
•SeeStarter Switch Check on
page 9-31.
•SeeAutomatic Transmission
Shift Lock Control System
Check on page 9-32.
•SeeIgnition Transmission Lock
Check on page 9-32.
•SeePark Brake and P (Park)
Mechanism Check on page 9-32.
•Engine cooling system and
pressure cap pressure check.
Radiator and air conditioning
condenser outside cleaning.
SeeCooling System on
page 9-17.
•If the vehicle has a Tire Sealant
and Compressor Kit, check the
sealant expiration date printed
on the instruction label of the
kit. SeeTire Sealant and
Compressor Kit on page 9-71.
10-4 Service and Maintenance
First Engine Oil Change After
Every 40 000 km/25,000 Miles
•Fuel system inspection for
damage or leaks.
•Exhaust system inspection for
loose or damaged components.
First Engine Oil Change After
Every 80 000 km/50,000 Miles
•Engine air cleaner filter
replacement. SeeEngine Air
Cleaner/Filter on page 9-16.
•Automatic transmission fluid
change (severe service) for
vehicles mainly driven in heavy
city traffic in hot weather, in hilly
or mountainous terrain, when
frequently towing a trailer, or used
for taxi, police, or delivery service.
SeeAutomatic Transmission
Fluid on page 9-14.
•Rear axle fluid change (severe
service) for vehicles mainly driven
in hilly or mountainous terrain,
when frequently towing a
trailer, used for high speed or
competitive driving, or used for
taxi, police, or delivery service.
SeeRear Axle on page 9-30.
First Engine Oil Change After
Every 160 000 km/100,000 Miles
•Automatic transmission fluid
change (normal service).
SeeAutomatic Transmission
Fluid on page 9-14.
•Rear axle fluid change (normal
service). SeeRear Axle on
page 9-30.
•Spark plug replacement.
An Emission Control Service.First Engine Oil Change After
Every 240 000 km/150,000 Miles
•Engine cooling system drain,
flush, and refill, cooling system
and cap pressure check,
and cleaning of outside of
radiator and air conditioning
condenser (or every 5 years,
whichever occurs first). See
Cooling System on page 9-17.
An Emission Control Service.
•Engine accessory drive belt
inspection for fraying, excessive
cracks, or obvious damage
and replacement, if needed.
An Emission Control Service.
Service and Maintenance 10-5