WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
The floor jack pad must not be placed under the rear suspension crossmember front reinforcement rib.
Position the floor jack pad as follows:
Fig 1: Identifying Position Of Floor Jack Pad Under Rear Suspension Crossmember