Chevrolet 2006 TrailBlazer EXT Owner's Manual page 450

2. If 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
overtighten the cable.
3. Loosen the cable by turning the wheel wrench
counterclockwise three or four turns.
4. Repeat this procedure at least two times.
If the spare tire lowers to the ground, continue with
Step 2 of Removing the Spare Tire and Tools on
page 5-82.
5. Turn the wrench counterclockwise until
approximately 6 inches (15 cm) of cable is exposed.
5-92
6. Attach the jack handle, extension(s) and the wheel
wrench to the jack and place it under the vehicle
towards the front of the rear bumper. Position
the center lift point of the jack under the center of
the spare tire.
7. Turn the wrench clockwise to raise the jack until it
lifts the end fitting.