Buick Enclave 2008 Owner's Manual page 384

All-Wheel-Drive Vehicle shown
2. Turn the lug wrench counterclockwise until
approximately 6 inches (15 cm) of cable is exposed.
3. Attach the lug 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 lug 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 lug wrench
counterclockwise. Keep lowering the jack
until the spare tire slides off the jack.
5-83