Pontiac 2006 Gto - Manual (Page 263)

7. Remove all of the
wheel nuts.
8. Remove the flat tire.
{ CAUTION:
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 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.
9. Remove any rust or dirt
from the wheel bolts,
mounting surfaces, and
spare tire.
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2006 - Pontiac GTO Owner Manual