2003 GMC Envoy Owner's Manual - Page 348

Windshield Wiper Blade Replacement Windshield wiper blades should be inspected at leasi twice a year for wear or cracking. See Normal Maintenance Replacement Parts on page 5-106 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. B. C. D. E. F. BladeAssembly ArmAssembly Locking Tab Blade Pivot Hook Slot ArmHook 5-53