GMC Yukon 2007 Owner's Manual page 16

To return the seatback to an upright position,
do the following:
1. Lift the lever fully without applying pressure to
the seatback and the seatback will return to
the upright position.
2. Push and pull on the seatback to make sure it
is locked.
16
Power Reclining Seatbacks
If the seats have power reclining seatbacks,
the control used to recline them is located on
the outboard side of the seat behind the power
seat control.
•
To recline the seatback, tilt the top of the
control rearward.
•
To bring the seatback forward, tilt the top of
the control forward.