2006 GMC Envoy Owner's Manual - Page 410

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. 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. 5-54