Cadillac SRX Owner's Manual page 357

If the spare tire will not lower, the secondary latch might
be engaged causing the tire not to lower. Do the
following to check the cable:
1. Check under the
vehicle to see if the
cable is visible. If it is
not visible, see
Secondary Latch
System on page 5-82.
2. If it is visible, first try to tighten the cable by
turning the wheel wrench clockwise until you
hear two clicks or feel it skip twice. You cannot
over-tighten the cable.
3. Loosen the cable then by turning the wrench
counterclockwise three or four turns.
4. Tighten the cable all the way and then loosen it at
least two times, if the spare tire has not lowered.
If the spare tire did lower to the ground, continue
with Step 4 under Removing the Spare Tire
and Tools on page 5-75.
If you still cannot lower the spare tire to the ground, see
Secondary Latch System on page 5-82.
5-77