Chevrolet SUBURBAN - 2011 Owner's Manual page 14

To adjust the power lumbar support,
if equipped:
On vehicles with two-way
lumbar, press and hold the top
or bottom of the control to
increase or decrease lumbar
support.
On vehicles with four-way
lumbar, press and hold the front
or rear of the control to increase
or decrease lumbar support. To
raise or lower the height of the
support, press and hold the top
or bottom of the control.
See Lumbar Adjustment on
page 3 6 for more information.
To recline a manual seatback:
1. Lift the lever.
2. Move the seatback to the
desired position, and then
release the lever to lock the
seatback in place.
3. Push and pull on the seatback to
make sure it is locked.