Chevrolet 2003 Blazer Owner's Manual page 331

To remove an inside-mounted spare tire, reach into your Insert the key and pull the
tire's cover and unscrew the wing nut at the center of lock case straight off. It is
the wheel. Remove it and the retainer. Unhook the not necessary to turn
tire from the mounting bracket and remove the cover. the key.
To remove a rear-mounted spare tire, first make
sure that the carrier arm is fully-latched to the tailgate.
Then remove the spare tire cover.
If you have this feature,
the locking wheel nut can
be removed by snapping
the rubber weather
cover off the face of the
lock case.
Put the spare tire near the flat tire.
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