Buick 2007 Rendezvous Owner's Manual page 435

Do the following to check the cable:
1. Check under the vehicle to see if the cable is
visible.
2. If it is not visible, see Secondary Latch
System on page 441.
If it is visible, first try to tighten the cable by
turning the folding wrench clockwise until
you hear two clicks or feel it skip twice. You
cannot over-tighten the cable.
3. Loosen the cable by turning the wrench
counterclockwise three or four turns.
4. If the spare tire has not lowered, tighten the
cable all the way and then loosen it at least
two times.
If the spare tire did lower to the ground,
continue with Step 5 under "Removing
the Spare Tire (Vehicles with the Rear
Convenience Center)" listed previously.
5. If you still cannot lower the spare tire to the
ground, see Secondary Latch System on
page 441.
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