Buick 2008 Lucerne Owner's Manual page 358

10. Install the compact spare tire.
CAUTION:
{
Never use oil or grease on studs or nuts.
Because the nuts might come loose. The
vehicle's wheel could fall off, causing a crash.
11. Put the wheel nuts back on with the rounded end of
the nuts toward the wheel. Tighten each nut by
hand until the wheel is held against the hub.
5-90
12. Lower the vehicle by turning the jack handle
counterclockwise. Lower the jack completely.