GMC Sierra Denali 2009 Owner's Manual page 10

Your vehicle may have additional features to adjust your
vehicle's power seat:
•
Raise or lower the front part of the seat cushion by
moving the front of the control up or down.
•
Raise or lower the rear part of the seat cushion by
moving the rear of the control up or down.
•
Raise or lower the entire seat by moving the entire
control up or down.
On seats with power reclining seatbacks, the control is
located behind the power seat control on the outboard
side of the seats. See "Power Reclining Seatbacks"
under Reclining Seatbacks on page 1-8.
A vehicle with a memory function allows seat settings to
be saved and recalled. See Memory Features on
page 1-6 for more information.
1-4
Power Lumbar
If the seats have power lumbar, the controls used to
operate this feature are located on the outboard side of
the seats.
•
To increase lumbar support, press and hold the front
of the control.
•
To decrease lumbar support, press and hold the rear
of the control.
•
To raise the height of the lumbar support, press and
hold the top of the control.
•
To lower the height of the lumbar support, press and
hold the bottom of the control.