GMC 1999 Sierra 1500 Pickup Owner's Manual page 271

I
CAUTION
Sust or dirt on the wheel, or on the parts to which it is fastened,
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
vou
need to, to get all the rust or dirt off.
A
: a n make the wheel nuts become loose after a time. The wheel
Remove any rust or dirt from the wheel bolts, mounting surfaces or spare
wheel. Place the spare on the wheel mounting surface.
1
CAUTION
I
Never use oil or grease on studs or nuts. If you do, the nuts migh
come loose. Your wheel could fall off, causing a serious accident.
K2530
Replace the wheel nuts with the rounded end of the nuts toward the wheel.
Tighten each wheel nut by hand until the wheel is held against the hub.
5-29