Chevrolet 2007 Colorado Owner's Manual page 376

4. To install the new wiper insert, slide the
insert (D), notched end last, into the end with
two blade claws (A). Slide the insert all the
way through the blade claws at the opposite
end (B). The plastic caps (C) will be forced
off as the insert is fully inserted.
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.
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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.