Chevrolet 2009 Avalanche Owner's Manual page 465

7. Tilt the tire with slack in the cable to access the
tire/wheel retainer (D). Separate the retainer from
the guide pin by sliding the retainer up the pin
while pressing down on the latch. When 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 guide pin.
8. Put the spare tire near the flat tire.
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