2015 GMC SIERRA lumbar support

Black plate (7,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
In Brief 1-7
Power Sliding Rear Window
If equipped, the power sliding rear
window works when the ignition has
been turned to ACC/ACCESSORY
or ON/RUN, or when Retained
Accessory Power (RAP) is active.
SeeRetained Accessory Power
(RAP) on page 9-29.
.Press the switch to open the
window.
.Pull the switch down to close the
window.
The power sliding rear window
cannot be operated manually.
Seat Adjustment
Power Seats
To adjust a power seat:
.Move the seat forward or
rearward by sliding the control
forward or rearward.
.Raise or lower the front part of
the seat cushion by moving the
front of the control up or down.
.Raise or lower the seat by
moving the rear of the control up
or down. See
Power Seat Adjustment on
page 3-3.
Lumbar Adjustment
To adjust the power lumbar support:
.Press and hold the control
forward to increase or rearward
to decrease upper and lower
lumbar support at the same time.

Black plate (8,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
1-8 In Brief
.Press and hold the control up to
increase upper lumbar support
and decrease lower lumbar
support.
Press and hold the control down
to increase lower lumbar support
and decrease upper lumbar
support.
See Lumbar Adjustment on
page 3-3.
Reclining Seatbacks
To adjust the seatback:
.Tilt the top of the control
rearward to recline.
.Tilt the top of the control forward
to raise.
See Reclining Seatbacks on
page 3-4.
Memory Features
The SET, "1," "2," andB(Exit)
buttons on the driver door are used
to manually save and recall memory
settings for the driver seat, outside
mirrors, and adjustable pedals.
See Memory Seats on page 3-5 and
Vehicle Personalization on
page 5-42.
Heated and Cooled Front
Seats
The buttons are on the center stack.
To operate, the engine must be
running.

Black plate (3,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
Seats and Restraints 3-3
restraint and pull forward to the
desired locking position. To adjust
the head restraint rearward, grasp
the head restraint and pull forward
fully until the mechanism releases
and allows the head restraint to
return to the full rear position.
The front seat outboard head
restraints are not removable.
Rear Seats
The rear seat has adjustable
headrests in the outboard seating
positions.
The height of the headrest can be
adjusted. Pull the headrest up to
raise it. To lower the headrest, push
the headrest down.
If you are installing a child restraint
in the rear seat, see“Securing a
Child Restraint Designed for the
LATCH System” underLower
Anchors and Tethers for Children
(LATCH System) on page 3-38.
Front Seats
Power Seat Adjustment
To adjust a power seat:
.Move the seat forward or
rearward by sliding the control
forward or rearward.
.Raise or lower the front part of
the seat cushion by moving the
front of the control up or down.
.Raise or lower the seat by
moving the rear of the control up
or down. To adjust the setback, see
Reclining
Seatbacks on page 3-4.
To adjust the lumbar support, see
Lumbar Adjustment on page 3-3.
Some vehicles are equipped with a
feature that activates a vibrating
pulse alert in the driver seat to help
the driver avoid crashes. See Driver
Assistance Systems on page 9-55.
Lumbar Adjustment

Black plate (4,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
3-4 Seats and Restraints
To adjust the power lumbar support:
.Press and hold the control
forward to increase or rearward
to decrease upper and lower
lumbar support at the same time.
.Press and hold the control up to
increase upper lumbar support
and decrease lower lumbar
support.
Press and hold the control down
to increase lower lumbar support
and decrease upper lumbar
support.
Reclining Seatbacks
To adjust the seatback:
.Tilt the top of the control
rearward to recline.
.Tilt the top of the control forward
to raise.
{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.
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.