GMC 2010 Sierra Denali Owner's Manual page 469

5. Remove all the wheel
nuts and take off the
flat tire.
WARNING:
Rust or dirt on a wheel, or on the parts to
which it is fastened, can make wheel nuts
become loose after 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 6 86 .
6. Remove any rust or dirt
from the wheel bolts,
mounting surfaces and
spare wheel.
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