WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Left Door
Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying Right Door
Courtesy of GENERAL MOTORS CORP.
Fig 3: Identifying Left Rear Door (Right Rear Door Similar)