GMC 2012 Canyon Owner's Manual page 280

5. Be sure that the notches are
locked by the bottom claws.
Make sure that all other claws
are properly locked on both
sides of the insert slots.
A. Claw in Notch
B. Correct Installation
C. Incorrect Installation
6. Put the blade assembly pivot in
the wiper arm hook. Pull up until
the pivot locking tab locks in the
hook slot.
7. Carefully lower the wiper arm
and blade assembly onto the
windshield.
Headlamp aim has been preset at
the factory and should need no
further adjustment.
However, if the vehicle is damaged
in a crash, the headlamp aim may
be affected. Aim adjustment to the
low-beam headlamps may be
necessary if oncoming drivers flash
their high-beam headlamps at you
(for vertical aim).
If the headlamps need to be
re-aimed, it is recommended that
the vehicle be taken to the dealer
for service.