2007 Buick Rainier Windshield Wiper Arms

You should use a small flat-bladed tool to remove the finish cap, hold the wiper arm blade tip to the target marks in the lower blackout area of the windshield while tightening the nut, use a J 39637 wiper arm puller or slightly rock the arm on the wiper pivot shaft to remove, and pinch the wiper blade tabs and rotate the blade away from the arm and gently push outward to remove the blade from the arm.

You should cycle the ignition key on and park the wiper motor, park the rear wiper motor, before installing the arm to the pivot shaft, place the wiper arm onto the pivot shaft and in the wiper pocket in the full park position, and hold the arm in the pocket while torquing the wiper arm nut to specification.