2003 GMC Sonoma Owner's Manual - Page 324
2003 GMC Sonoma Manual
Page 324 highlights
Windshield Wiper Blade Replacement Windshield wiper blades should be inspected at least twice a year for wear and cracking. See "Wiper Blade Check under At Least Twice a Year on page 6-26. Replacement blades come in different types and are removed in different ways. For proper type and length, see Normal Maintenance Replacement Partson page 5- 103. 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 6. 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. 5-61