Chevrolet 2003 Venture Owner's Manual page 394

When It Is Time for New Tires
One way to tell when it's
time for new tires is to
check the treadwear
indicators, which will
appear when your tires
have only 1 /16 inch
(1.6 mm) or less of tread
remaining.
You need a new tire if any of the following statements
are true:
You can see the indicators at three or more places
0
You can see cord or fabric showing through the
The tread or sidewall is cracked, cut or snagged
The tire has a bump, bulge or split.
around the tire.
tire's rubber.
deep enough to show cord or fabric.
The tire has a puncture, cut or other damage that
can't be repaired well because of the size or
location of the damage.
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