GMC 2012 Sierra - Manual (Page 73)

Black plate (5,1) GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Seats and Restraints 3-5
Power Lumbar
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.
Reclining Seatbacks
{
WARNING
Sitting in a reclined position when
the vehicle is in motion can be
dangerous. Even when buckled
up, the safety belts cannot do
their job.
The shoulder belt will not be
against your body. Instead, it will
be in front of you. In a crash, you
could go into it, receiving neck or
other injuries.
The lap belt could go up over
your abdomen. The belt forces
would be there, not at your pelvic
bones. This could cause serious
internal injuries.
(Continued)
WARNING (Continued)
For proper protection when the
vehicle is in motion, have the
seatback upright. Then sit well
back in the seat and wear the
safety belt properly.
Do not have a seatback reclined if
the vehicle is moving.