WARNING: This page is about a different car, the 2007 Pontiac Montana SV6, 2007 Chevrolet Uplander, and 2007 Buick Terraza. 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.
Position the ELC sensor link (1) to the ball studs on the sensor and control arm.
Press the ELC sensor link ends onto the ball studs until fully seated.