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 Frame Rail Pad
Courtesy of GENERAL MOTORS CORP.
IMPORTANT:
The floor jack pad must not contact rocker panel or the floor pan.
Position the floor jack pad under the frame rail pad.