1998 GMC Sonoma Owner's Manual - Page 292

5. Be sure that the notches are locked by the bottom claws. Make sure that all other claws are properly locked on both sides of the insert slots. A. Claw in Notch B. Correct Installation C. Incorrect Installation 6. Put the blade assembly pivot in the wiper arm hook. Pull up until the pivot locking tab locks in the hook slot. 7. Carefully lower the wiper arm and blade assembly onto the windshield. Tires Your new vehicle comes with high-quality tires made by a leading tire manufacturer. If you ever have questions about your tire warranty and where to obtain service, see your GM Warranty booklet for details. C