Cadillac 2006 STS - Manual (Page 402)

{ 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.
10. Remove any rust or dirt
from the wheel bolts,
mounting surfaces, and
spare wheel.
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.
14. Lower the vehicle by turning the wheel wrench
counterclockwise. Lower the jack completely.
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