Buick 2006 Rendezvous Owner's Manual page 376

To replace the windshield wiper blade assembly do
the following:
1. Lift the wiper arm away from the windshield.
5-50
2. Push the release lever (B) to disengage the hook
and push the wiper arm (A) out of the blade (C).
3. Push the new wiper blade securely on the wiper
arm until you hear the release lever click into
place.
To replace the rear wiper blade, follow the steps
listed above.