Buick 2005 Rendezvous Owner's Manual page 405

To release the spare tire from the secondary latch, do
the following:
CAUTION:
{
Someone standing too close during the
procedure could be injured by the jack. If the
spare tire does not slide off the jack
completely, make sure no one is behind you or
on either side of you as you pull the jack out
from the spare.
1. If the cable is not visible, start this procedure at
Step 3.
All-wheel-drive Vehicle shown
2. Turn the wrench counterclockwise until
approximately 6 inches (15 cm) of cable is exposed.
5-85