Dual Tire Rotation; When It Is Time For New; Tires - GMC Sierra 2015 Owner's Manual

10-70 Vehicle Care
Storing a Flat or Spare Tire and
Tools under Tire Changing on
page 10-79.

Dual Tire Rotation

When the vehicle is new,
or whenever a wheel, wheel bolt,
or wheel nut is replaced, check the
wheel nut torque after
160, 1 600, and 10 000 km (100,
1,000, and 6,000 mi) of driving. For
proper torque and wheel nut
tightening information, see
Removing the Flat Tire and
Installing the Spare Tire under Tire
Changing on page 10-79.
The outer tire on a dual wheel setup
generally wears faster than the
inner tire. Tires last longer and wear
more evenly if they are rotated. See
Tire Inspection on page 10-67 and
Tire Rotation on page 10-67. Also
see Maintenance Schedule on
page 11-3.
Warning
If the vehicle is operated with a
tire that is underinflated, the tire
can overheat. An overheated tire
can lose air suddenly or catch
fire. You or others could be
injured. Properly inflate all tires,
including the spare.
See Tire Pressure on page 10-61,
for information on proper tire
inflation.

When It Is Time for New

Tires

Factors, such as maintenance,
temperatures, driving speeds,
vehicle loading, and road conditions
affect the wear rate of the tires.
Treadwear indicators are one way to
tell when it is time for new tires.
Treadwear indicators appear when
the tires have only 1.6 mm (1/16 in)
or less of tread remaining. Some
commercial truck tires may not have
treadwear indicators. See Tire
Inspection on page 10-67 and Tire
Rotation on page 10-67 for
additional information.
The rubber in tires ages over time.
This also applies to the spare tire,
if the vehicle has one, even if it is
never used. Multiple factors
including temperatures, loading
conditions, and inflation pressure