Page 65 of 534

Black plate (3,1)GMC Sierra Owner Manual - 2013 - crc - 8/14/12
Seats and Restraints 3-3
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
down on the headrest.
Rear outboard headrests are not
designed to be removed.
Front Seats
Seat Adjustment
{WARNING
You can lose control of the
vehicle if you try to adjust a driver
seat while the vehicle is moving.
Adjust the driver seat only when
the vehicle is not moving.
To adjust the seat:
1. Lift the bar under the front edgeof the seat cushion to unlock
the seat.
2. Slide the seat to the desired position and release the bar.
3. Try to move the seat back and forth to be sure the seat is
locked in place.
Center Seat
If equipped, the center front
seatback doubles as an armrest and
cupholder/storage area for the driver
and passenger when the center
front seat is not used. Do not use it
as a seating position when the
seatback is folded down.
Page 113 of 534

Black plate (51,1)GMC Sierra Owner Manual - 2013 - crc - 8/14/12
Seats and Restraints 3-51
1.3. Remove the cover toexpose the anchor.
1.4. Route, attach, and tighten the top tether according to
your child restraint
instructions and the
following instructions:
If the position you are using
has an adjustable headrest
or head restraint and you
are using a dual tether,
route the tether around the
headrest or head restraint.
If the position you are using
has an adjustable headrest
or head restraint and you
are using a single tether,
raise the headrest or head
restraint and route the
tether under the headrest or
head restraint and in
between the headrest or
head restraint posts. 2. See
Securing Child Restraints
(Center Front Seat Position) on
page 3‑56 orSecuring Child
Restraints (Right Front Seat
Position) on page 3‑57 or
Securing Child Restraints (Rear
Seat Position) on page 3‑54 for
instructions on installing the
child restraint using the safety
belts.
3. Before placing a child in the child restraint, make sure it is
securely held in place. To check,
grasp the child restraint at the
LATCH path and attempt to
move it side-to-side and
back-and-forth. There should be
no more than 2.5 cm (1 in) of
movement for proper installation.
Page 114 of 534

Black plate (52,1)GMC Sierra Owner Manual - 2013 - crc - 8/14/12
3-52 Seats and Restraints
Crew and Extended Cab Models
1. Attach and tighten the lowerattachments to the lower
anchors. If the child restraint
does not have lower
attachments or the desired
seating position does not have
lower anchors, secure the child
restraint with the top tether and
the safety belts. Refer to your
child restraint manufacturer
instructions and the instructions
in this manual.
1.1. Find the lower anchors for the desired seating
position.
1.2. Put the child restraint on the seat.
1.3. Attach and tighten the lower attachments on the child
restraint to the lower
anchors. 2. If the child restraint manufacturer
recommends that the top tether
be attached, attach and tighten
the top tether to the top tether
anchor (loop), if your vehicle has
one. Refer to the child restraint
instructions and the following
steps:
Example —Rear Driver Side
Position
Example —Rear Driver Side
Position
2.1. When using a child restraint with a top tether in the rear
driver side position:
A. Raise the headrest or head restraint.
Page 115 of 534

Black plate (53,1)GMC Sierra Owner Manual - 2013 - crc - 8/14/12
Seats and Restraints 3-53
B. Route the toptether (B) between
the headrest or head
restraint posts,
through the loop (A),
behind the inboard
headrest or head
restraint post, and
under the center
shoulder belt (C).
C. Attach the top tether (B) to the top
tether
anchor (loop) (D) at
the center rear
seating position.
2.2. When using a child restraint with a top tether in the rear
center position:
A. Route the top tether (B) through
the center loop (D),
and behind the
inboard passenger
side headrest or
head restraint post. B. Attach the top
tether (B) to the top
tether anchor (loop)
at the rear
passenger side
seating position.
2.3. When using a child restraint with a top tether in the rear
passenger position:
A. Raise the headrest or head restraint.
B. Route the top tether (B) between
the headrest or head
restraint posts,
through the loop on
the passenger side
and behind the
inboard headrest or
head restraint post. C. Attach the top
tether (B) to the top
tether
anchor (loop) (D) at
the center rear
seating position.
2.4. Tighten the top tether when and as the child restraint
manufacturer's
instructions say.
When the top tether is
tightened, the anchor (loop)
may bend. This is normal
and will not damage the
vehicle.
3. Before placing a child in the child restraint, make sure it is
securely held in place. To check,
grasp the child restraint at the
LATCH path and attempt to
move it side-to-side and
back-and-forth. There should be
no more than 2.5 cm (1 in) of
movement for proper installation.