Pontiac 2005 Montana Owner's Manual page 402

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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.
8. Install the compact spare tire and 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.
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9. Lower the vehicle by attaching the folding wheel
wrench to the jack and turning the wrench
counterclockwise. Lower the jack completely.