2008 GMC Acadia Owner's Manual - Page 396

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. 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. 7. Lower the jack by turning the lug wrench counterclockwise. Keep lowering the jack until the spare tire slides off the jack. 5-82