GMC T-Series 2007 Owner's Manual page 262

CAUTION:
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If wheel studs are damaged, they can
break. If all the studs on a wheel broke,
the wheel could come off and cause a
crash. If any stud is damaged because
of a loose-running wheel, it could be that
all of the studs are damaged. To be sure,
replace all studs on the wheel. If the stud
holes in a wheel have become larger,
the wheel could collapse in operation.
Replace any wheel if its stud holes have
become larger or distorted in any way.
Inspect hubs and hub-piloted wheels
for damage. Because of loose running
wheels, piloting pad damage may occur
and require replacement of the entire hub,
for proper centering of the wheels. When
replacing studs, hubs, wheel nuts or
wheels, be sure to use GM original
equipment parts.
262
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 a crash. 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 you need to, to get all the rust or
dirt off.
How Often to Check
Wheel tightness is so important you should have a
technician check nut tightness on all wheels with a
torque wrench after your first 100 miles (160 km),
and then 1,000 miles (1 600 km) after that. Be sure
to repeat this service whenever you have a tire
removed or serviced. See Scheduled Maintenance
on page 295 for further information.