Chevrolet 2002 TrailBlazer Owner's Manual page 316

10. Disconnect the jack handle from the jack and
carefully remove the jack. Use one hand to push
against the spare while firmly pulling the jack out
from under the spare tire with the other hand.
If the spare tire is hanging from the cable, insert
the jack handle, extension and wheel wrench into
the hoist shaft hole in the bumper, on an angle,
and turn the wheel wrench counterclockwise to
lower the spare the rest of the way.
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11. Tilt the retainer at the end of the cable and pull it
through the wheel opening. Pull the tire out from
under the vehicle.
12. If the cable is hanging under the vehicle, turn the
wheel wrench in the hoist shaft hole in the bumper
clockwise to raise the cable back up.
Have the hoist assembly inspected as soon as you can.
You will not be able to store a spare or flat tire using the
hoist assembly until it has been repaired or replaced.
To continue changing the flat tire, return to Step 2
of "Removing the Spare Tire and Tools" earlier in
this Section.