Chevrolet 2005 Colorado Owner's Manual page 347

8. Place the spare tire on the mounting surface.
7. Remove any rust or dirt
from the wheel bolts,
mounting surfaces
and spare wheel.
CAUTION:
{
Never use oil or grease on studs or nuts. If
you do, the nuts might come loose. Your wheel
could fall off, causing a serious accident.
9. Put the wheel nuts
back on with the
rounded end of the
nuts toward the wheel.
Tighten each wheel
nut by hand. Then use
the wheel wrench to
tighten the nuts
until the wheel is held
against the hub.
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