Buick 2003 Rendezvous Owner's Manual page 385

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.
7. Lower the jack by turning the folding wrench
counterclockwise. Keep lowering the jack until
the spare tire is resting on the folding wrench.
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