Under Rear Suspension Crossmember
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
The floor jack (2) pad must not be placed under the rear suspension crossmember (3) front reinforcement rib.
Position the floor jack (2) pad as shown in the illustration.
Courtesy of GENERAL MOTORS CORP.