okay, since you obviously didn't check the manual... here is the scoop
there is a glass lock release handle under the chrome trim piece on the outside of the rear hatch. the door release is in the center of the chrome trim piece, and the window release is toward the right side.
the window release is more of a handle, while the lift gate release is a push button.
when you pull the glass lock release handle, the window lock will release, and you can pull the glass open using the little handle that is attached to the glass itself.
p.s. its on page 3-9 of the owners manual