When it fs time for new tires – GMC 2003 Sierra User Manual
Page 452
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When It fs Time for New Tires
One way to teK when it's
time tor new Ijres Is to
check the treadwear
indicalorSi which will
appear when your liiries
have onky 1/16 inch
(1.0 mm} or less of tread
remaining. Sorrie
commercial (r-uck tines may
not have treadwear
indicators.
You need a new lire it any of the fbliowlr^g statements
are true,
* You can see the indicators at ihree or more places
around tha tire.
* You can see cord or fabric showing ihrougl i ihe
tire's rubber.
* The Tread or sidewall is crocked, cut or snagged
deep enough to show cord or fabric.
* The tire has a bump, bulge or spilt,
* The tire has a puncture, cut or other damage that
can't be repaired well because of Ihe size or
location of the damage.
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