Chevrolet 2007 Silverado 1500 Pickup Owner's Manual page 575

CAUTION:
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Rust or dirt on the wheel, or on the parts to
which it is fastened, can make the wheel
nuts become loose after a time. The wheel
could come off and cause an accident.
When you change a wheel, remove any rust
CAUTION: (Continued)
6. Remove all the
wheel nuts and take
off the flat tire.
CAUTION: (Continued)
or dirt from the 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.
7. Remove any rust or
dirt from the wheel
bolts, mounting
surfaces, and
spare wheel.
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