GMC 2011 Sierra Denali Owner's Manual page 421

WARNING (Continued)
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 If a Tire Goes Flat
on page 10 70.
6. Remove any rust or dirt from the
wheel bolts, mounting surfaces,
and spare wheel.
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.
Vehicle Care
7. Put the wheel nuts back on with
the rounded end of the nuts
toward the wheel after mounting
the spare. 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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