Pontiac G3 2009 Owner's Manual page 13

4. Detach the center safety belt from the mini buckle
by inserting the ignition key into the slot in the mini
buckle, pressing the release button, and allowing
the belt to retract.
5. Pull up the release knob located on top of either of
the rear seatbacks.
6. Fold the rear seatback forward and down.
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