Chevrolet 2012 Tahoe Owner's Manual page 419

If the spare tire does not lower to
the ground, the secondary latch
is engaged causing the tire not
to lower. See Secondary Latch
System on page 10 78 for more
information.
6. Use the wheel wrench hook to
pull the hoist cable closer to
assist in reaching the spare tire.
7. Tilt the tire toward the vehicle
with some slack in the cable to
access the tire/wheel retainer.
Separate the retainer from the
guide pin by sliding the retainer
up the pin while pressing down
on the latch.
Vehicle Care
Once the retainer is separated
from the guide pin, tilt the
retainer and pull it through the
center of the wheel along with
the cable and latch.
8. Put the spare tire near the
flat tire.
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