Pontiac 2005 Montana Owner's Manual page 398

3. Tilt the retainer at the end of the cable to remove
the compact spare tire from the cable, so it can be
pulled up through the wheel opening.
5-72
The hoist is used to store a full-size or a flat road tire
under the vehicle. See Storing a Flat or Spare Tire and
Tools on page 5-80 .
If the compact spare tire will not lower, check under the
vehicle to see if the tire is hanging loose and the
cable end and spring under the wheel plate are missing.
If so, the secondary latch system is engaged. See
Secondary Latch System on page 5-78 .
To continue changing the flat tire, see Removing the
Flat Tire and Installing the Spare Tire on page 5-73 .