2004 Cadillac DeVille Owner's Manual - Page 339

Windshield Wiper Blade Replacement Windshield wiper blades should be inspected each time maintenance is performed. See "Wiper Blade Check" under Scheduled Maintenance on page 6-4. It is a good idea to clean or replace the wiper blade assembly on a regular basis or when worn. For proper windshield wiper blade length and type, see Normal Maintenance Replacement Parts on page 6-13. To replace the wiper blade assembly, do the following: 1. Turn the ignition to ACCESSORY and turn the wipers on. Position the wipers on the windshield in the mid-wipe position. Then with a door open, turn the ignition to OFF. 2. Tip the blade up almost to a T position and push down on the tab to release the wiper blade assembly. 3. To install, align the wiper blade with the loop on the wiper blade assembly, and push up to snap it into place. 5-59