Treadwear Indicators:Narrow bands, sometimes
called “wear bars,” that show across the tread of a tire
when only 2/32 inch of tread remains. SeeWhen It
Is Time for New Tires on page 5-69.
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 testing procedures. The ratings are molded
into the sidewall of the tire. SeeUniform Tire Quality
Grading on page 5-71.
Vehicle Capacity Weight:The number of designated
seating positions multiplied by 150 lbs. (68 kg) plus
the rated cargo load. SeeLoading Your Vehicle
on page 4-33.
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 original equipment tire size
and recommended in ation pressure. SeeLoading Your
Vehicle on page 4-33.In ation - Tire Pressure
The tire and loading information label, shows the correct
in ation pressures for your tires when they’re cold.
“Cold” means your vehicle has been sitting for at least
three hours or driven no more than 1 mile (1.6 km). See
Loading Your Vehicle on page 4-33, for the location
of your vehicle’s tire and loading information label.
Notice:Don’t let anyone tell you that underin ation
or overin ation is all right. It’s not. If your tires
don’t have enough air (underin ation), you can get
the following:
Too much exing
Too much heat
Tire overloading
Bad wear
Bad handling
Bad fuel economy
If your tires have too much air (overin ation), you
can get the following:
Unusual wear
Bad handling
Rough ride
Needless damage from road hazards
5-66
Temperature – A, B, C
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 speci ed 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 the Federal Motor Vehicle 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 in ated and not
overloaded. Excessive speed, underin ation, or
excessive loading, either separately or in combination,
can cause heat buildup and possible tire failure.
Wheel Alignment and Tire Balance
The wheels on your vehicle were aligned and balanced
carefully at the factory to give you the longest tire life
and best overall performance.
Scheduled wheel alignment and wheel balancing are
not needed. However, if you notice unusual tire wear or
your vehicle pulling one way or the other, the alignment
may need to be reset. If you notice your vehicle
vibrating when driving on a smooth road, your wheels
may need to be rebalanced.
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 (except some
aluminum wheels, which can sometimes be repaired).
See your dealer if any of these conditions exist.
Your dealer will know the kind of wheel you need.
Each new wheel should have the same load-carrying
capacity, diameter, width, offset and be mounted
the same way as the one it replaces.
5-72
Capacities and Speci cations
Please refer toRecommended Fluids and Lubricants on page 6-12. All capacities are approximate. When adding, be
sure to ll to the appropriate level or as recommended in this manual.
See refrigerant charge label under the hood for charge capacity information and requirements.
Wheels and Tires
Model Description Torque
G/H 1500 6 Bolts (14 mm) 140 lb ft (190Y)
G/H 2500 & G/H 3500 8 bolts (14 mm) 140 lb ft (190Y)
Tire PressureSee the “Certi cation/Tire Label” underLoading Your Vehicle
on page 4-33This label is located on the rear edge of the
driver’s door.
Capacities
ApplicationCapacities
QTY Without Rear
Heater QTY With Rear Heater
Cooling System
After re ll, the level must be rechecked. See “Cooling System” in the Index.
VORTEC™ 4300 V6 11.0 quarts (10.4 L) 14.0 quarts (13.2 L)
VORTEC™ 4800 V8 13.4 quarts (12.7 L) 16.4 quarts (15.5 L)
VORTEC™ 5300 V8 13.4 quarts (12.7 L) 16.4 quarts (15.5 L)
VORTEC™ 6000 V8 14.8 quarts (14.0 L) 17.8 quarts (17.0 L)
5-106
