GMC Sierra Denali Classic 2007 Owner's Manual page 412

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.
412
6. Remove all the
wheel nuts and take
off the flat tire.
8. Install the spare tire.
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.
10. Tighten each wheel nut by hand. Then use
the wheel wrench to tighten the nuts until the
wheel is held against the hub.
7. Remove any rust or
dirt from the wheel
bolts, mounting
surfaces, and spare
wheel.