WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Rear Seat Cushion & Mechanism
Courtesy of GENERAL MOTORS CORP.
Callout
Component Name
1
Rear Seat Cushion Procedure: Push the front of the seat rearward and upward to release the seat cushion wire from the dome bracket.