GMC Defense 2006 Owner's Manual Supplement page 61

Cargo Bed Carrier
The cargo bed tire carrier is located in the
passenger front of the cargo bed. To remove the tire,
use and turn the wheel wrench counterclockwise and
remove the wheel nuts (A).
5-18
Swing Away Carrier
The swing away tire carrier is located at the rear of
the vehicle attached to the bumper. To remove the
tire, use and turn the wheel wrench counterclockwise
and remove the wheel nuts (A).