WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Positioning Floor Jack Under Center Of Rear Axle Differential
Courtesy of GENERAL MOTORS CORP.
Position the floor jack pad under the center of the rear axle differential.
Care should be taken so as not to damage the stabilizer bar.