Chevrolet TrailBlazer 2007 Owner's Manual page 476

5. Tilt the retainer at the end of the cable when
the tire has been completely lowered, and pull
it through the wheel opening.
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6. Pull the tire out from under the vehicle.
Notice: If you drive away before the spare tire
or secondary latch system cable has been
reinstalled, you could damage your vehicle.
Always reinstall this cable before driving
your vehicle.
7. Put the spare tire near the flat tire.