2002 GMC Envoy Owner's Manual - Page 351

Windshield Wiper Blade Replacement Windshield wiper blades should be inspected at least twice a year for wear or cracking. See "Windshield Wiper Blade Check" in the Index for more information. See "Normal Maintenance Replacement Parts" in the Index for the proper type of replacement blade. NOTICE: Use care when removing or installing a blade assembly. Accidental bumping can cause the arm to fall back and strike the windshield. 1. To remove the old wiper blades, lift the wiper arm until it locks into a vertical position. A. Blade Assembly B. Arm Assembly C. Locking Tab D. Blade Pivot E. Hook Slot F. Arm Hook 2. Press down on the blade assembly pivot locking tab. Pull down on the blade assembly to release it from the wiper arm hook. 6-36