Buick 2007 Rendezvous - Manual (Page 443)

6. Keep raising the jack until the spare tire stops
moving upward and is held firmly in place.
This lets you know that the secondary
latch has released and the spare tire is
balancing on the jack.
7. Lower the jack by turning the folding wrench
counterclockwise. Keep lowering the jack until
the spare tire slides off the jack.
8. Disconnect the folding wrench from the jack
and carefully remove the jack. Use one hand
to push against the spare tire while firmly
pulling the jack out from under the spare tire
with the other hand.
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