Wear

1. Turn air suspension switch OFF if so equipped. Raise vehicle on a hoist. Support front suspension lower arm in a normal driving position.
2. Wipe the grease fitting and checking surfaces, so they are free of dirt and grease. The checking surface is the round boss into which the grease fitting is threaded.
3. The checking surface should project outside the cover. If the checking surface is inside the cover, replace the front suspension lower arm ball joint.