GMC 2012 Canyon Owner's Manual page 315

Put the tools to the side while you
access the jack and wheel blocks.
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.
1. Turn the wing nut on the cover
counterclockwise to remove it.
A. Jack
B. Wheel Blocks
C. Wing Nut
D. Jack Knob
2. Lower the jack (A) by turning the
jack knob (D) counterclockwise
to release the jack (A) from the
bracket.
3. Turn the wing nut (C)
counterclockwise to release the
wheel blocks (B).
For crew cab models, the jack and
wheel blocks are located under the
driver side rear seat.
1. Reach under the rear seat to
access the jack and wheel
blocks.
2. Turn the jack knob
counterclockwise to lower the
jack all the way and release it
from the bracket.