When It Is Time For New Tires; Buying New Tires - GMC Sierra 2005 Owner's Manual

When It Is Time for New Tires

You need a new tire if any of the following statements
are true:
•
You can see the indicators at three or more places
around the tire.
•
You can see cord or fabric showing through the
tire's rubber.
•
The tread or sidewall is cracked, cut or snagged
deep enough to show cord or fabric.
•
The tire has a bump, bulge or split.
•
The tire has a puncture, cut or other damage that
can't be repaired well because of the size or
location of the damage.
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. Some
commercial truck tires may
not have treadwear
indicators.

Buying New Tires

To find out what kind and size of tires you need, look at
the Certification/Tire label. See Loading Your Vehicle
on page 4-50, for more information about this
Certification/Tire label and where it can be found on
your vehicle.
The tires installed on your vehicle when it was new had
a Tire Performance Criteria Specifications (TPC
Spec) number on each tire's sidewall. When you get
new tires, GM recommends that you get tires with that
same TPC Spec number. That way your vehicle will
continue to have tires that are designed to give proper
endurance, handling, speed rating, load range,
traction, ride, and other things during normal service on
your vehicle. If your tires have an all-season tread
design, the TPC number will be followed by an "MS" (for
mud and snow).
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