GMC CHEVROLET Silverado 6500HD 2019 Owner's Manual page 339

338 Vehicle Care
Label Example
1. Gross Weight Rating of the
Front Axle
2. Tire Size for Front Axle
3. Tire Size for Rear Axle
4. Gross Weight Rating of the
Rear Axle
The Tire/Certification Label is
typically found on the driver-side
door frame of the vehicle.
It indicates the size of the original
equipment tires installed on each
axle of the vehicle.
The load rating of the tires installed
on your vehicle at the time of
production is at or in excess of the
Gross Axle Weight Rating (GAWR)
on the Tire/Certification Label.
When replacing the tires be sure the
replacement tire load rating (listed
separately in pounds and kilograms
on the tire sidewall for single or dual
applications) multiplied by the
number of tires on that axle is equal
to or higher than the specified listed
Steer Axle or Drive Axle GAWR.
Failure to do so will adversely affect
maximum load-carrying capacity.
Tires with the same size
specifications do not always have
the same load specification. See
Vehicle Load Limits 0 205.
Dual Tires Matching
Dual tires should be matched using
tires of equivalent size. Tires which
differ more than 6 mm (1/4 in) in
diameter or 19 mm (3/4 in) in
circumference should not be
mounted on the same dual wheel
assembly.
Wear
Radial tires can exhibit three types
of normal wear patterns: even,
erosion, or chamfer.
Even wear is a sign that the tire is
being properly used and maintained.
Erosion wear has also been called
rolling wear, channel, or river wear.
Erosion wear is found more often at
free rolling tires. This is an
indication that the tire is being used
in a slow wearing operation. What
happens is that the belt plies are
held very rigid and the tread is not
allowed to distort as it passes
through the contact area. Wear will
only occur at the edge of the tread.
No corrective action is required.
If erosion gets to be 2 mm (1/16 in)
or more, the tire may be rotated to a
drive axle.
Chamfer or shoulder wear with tires
inflated properly, is a normal
tendency of most radial tire designs.
If both inside and outside shoulders
are wearing evenly around the tire,
no further action is required.
Overinflation is not effective in
correcting this effect.
Irregular Wear
If irregular wear is present, check
the axle alignment, tire pressure,
wheel balance, shock and
suspension component condition,
and wheel bearing end play.