1994 GMC Sonoma Owner's Manual - Page 260

0 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. 2 3 . t I 1. Claw in Notch 2. Correct Installation 3. Incorrect Installation Put the blade assembly pivot in the wiper arm hook. Pull up until the pivot locking tab locks in the hook slot. Carefully lower the wiper arm and blade assembly onto the windshield. Air Conditioning Every now and then have your dealership check your air conditioning system to be sure it has not lost any cooling ability. If you think the system is not working properly, have your dealership check it out as soon as possible. The air conditioning will not work when the temperature is below 40°F (4°C).