Chevrolet 2008 Uplander Owner's Manual page 401

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.
8. Remove any rust or dirt
from the wheel bolts,
mounting surfaces
and spare wheel.
Tighten each nut by hand until the wheel is held
against the hub.
9. Install the compact
spare tire and put the
wheel nuts back
on with the rounded
end of the nuts toward
the wheel.
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