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GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
10-58
Vehicle Care
Treadwear Indicators
:
Narrow
bands, sometimes called wear
bars, that show across the tread
of a tire when only 1.6 mm
(1/16 in) of tread remains. See
When It Is Time for New Tires
on page 10
‑
68
.
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. See
Uniform Tire Quality Grading on
page 10
‑
70
.
Vehicle Capacity Weight
:
The number of designated
seating positions multiplied by
68 kg (150 lbs) plus the rated
cargo load. See
Vehicle Load
Limits on page 9
‑
16
.
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
capacity weight and the
original equipment tire size
and recommended inflation
pressure. See
“
Tire and Loading
Information Label
”
under
Vehicle
Load Limits on page 9
‑
16
.
Tire Pressure
Tires need the correct amount
of air pressure to operate
effectively.
Notice:
Neither tire
underinflation nor
overinflation is good.
Underinflated tires, or tires
that do not have enough air,
can result in:
.
Tire overloading and
overheating which could
lead to a blowout.
.
Premature or
irregular wear.
.
Poor handling.
.
Reduced fuel economy.