2004 Chevrolet Impala Owner's Manual - Page 319

Windshield Wiper Blade Replacement Windshield wiper blades should be inspected at least twice a year for wear or cracking. See "Windshield Wipers, Blade Check" under Scheduled Maintenance on page 6-4 for more information. Replacement blades come in different types and are removed in different ways. For proper type and length, see Normal Maintenance Replacement Parts on page 6-13. Here's how to remove the wiper blades: 1. Turn on the wipers to the low wipe setting. 2. Turn off the ignition while the wipers are at the outer positions of the wiper pattern. The blades are more accessible for removal/replacement while in this position. 3. Pull the windshield wiper arm away from the windshield. 4. While holding the wiper arm away from the glass, push the release clip from under the blade connecting point and pull the old blade assembly down toward the glass to remove it from the wiper arm. 5. Push the new wiper blade securely on the wiper arm until you hear the release clip "click" into place. 5-57