Buick 2005 Rendezvous - Manual (Page 406)

3. Attach the folding wrench to the jack and raise the
jack at least 10 turns.
4. Place the jack under the vehicle, ahead of the rear
bumper. Position the center lift point of the jack
under the center of the spare tire.
5. Turn the folding wrench clockwise to raise the jack
until it lifts the secondary latch spring.
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.
Front-wheel-drive Vehicle shown
5-86