WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Automatic Level Control Sensor Link
Courtesy of GENERAL MOTORS CORP.
Install the ALC sensor link to the lower control arm ball stud.
Install the ALC sensor link to the sensor arm ball stud.