Chevrolet 2008 Aveo Owner's Manual page 12

4. Detach the center safety belt from the mini buckle
by inserting the key into the slot in the mini buckle,
pressing the release button, and allowing it to
retract.
1-8
5. Pull up the release knob located on top of the
rear seatback.
6. Fold the rear seatback forward and down.
To return the seatback to the upright position:
1. Hook the safety belts into the safety belt guide.
2. Lift the seatback up and push it to its original
position.