Chevrolet 2010 HHR Owner's Manual page 407

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 changing a wheel, remove any
rust or dirt from places where the wheel attaches
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 88.
6-104
8. Place the tire on the wheel mounting surface.
9. Reinstall the wheel nuts with the rounded end of
the nuts toward the wheel. Tighten each by hand
until the wheel is held against the hub.
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.
7. Remove any rust or dirt
from the wheel bolts,
mounting surfaces, and
wheel.