Cadillac STS 2011 Owner's Manual page 452

WARNING: (Continued)
to the vehicle. In an emergency, 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 94.
WARNING:
Never use oil or grease on bolts or nuts because
the nuts might come loose. The vehicle's wheel
could fall off, causing a crash.
11. Install the spare tire.
12. Put the wheel nuts back on with the rounded end
of the nuts toward the wheel.
13. Tighten each wheel nut by turning it clockwise with
your hand until the wheel is held against the hub.
10. Remove any rust or dirt
from the wheel bolts,
mounting surfaces, and
spare wheel.
6-101