GMC Sierra Denali Classic 2007 Owner's Manual page 395

The purpose of regular rotation is to achieve more
uniform wear for all tires on the vehicle. The
first rotation is the most important. See Scheduled
Maintenance on page 449.
When rotating your vehicle's tires, always use the
correct rotation pattern shown here.
Do not include the spare tire in the tire rotation.
After the tires have been rotated, adjust the
front and rear inflation pressures as shown on the
tire and loading information label. See Loading
Your Vehicle on page 296 and Inflation - Tire
Pressure on page 393, for more information.
Make certain that all wheel nuts are properly
tightened. See "Wheel Nut Torque" under
Capacities and Specifications on page 444.
CAUTION:
{
Rust or dirt on a wheel, or on the parts to
which it is fastened, can make wheel nuts
become loose after a time. The wheel
could come off and cause an accident.
When you change a wheel, remove any
rust or dirt from places where the wheel
attaches to the vehicle. In an emergency,
you can use a cloth or a paper towel to do
this; but be sure to use a scraper or wire
brush later, if needed, to get all the rust or
dirt off. See Changing a Flat Tire on
page 404.
395