GMC 2006 Canyon Owner's Manual page 350

Regular/Extended Cab
The vehicle will have a cover if it is an extended or
regular cab.
5-74
For regular and extended
cab vehicles, the jack and
wheel blocks are located
under the cover at the
center of the vehicle
behind the front seats.
To access the tools, do the following:
Extended/Regular Cab
2. Turn the wing nut on the cover counterclockwise to
remove it.
For crew cab models, reach under the rear seat to
access the jack and wheel blocks. To reinstall the
jack and wheel block assembly in the mounting
bracket, insert the tabs into the jack base by pushing
the blocks up into the assembly. The outer hole in the
jack base aligns with the tab on the bracket. When
reinstalling, make sure the jack is secure, but do not
overtighten the jack in the bracket.
1. Move the seats forward
to access the cover.