Page 17 of 594
Black plate (11,1)GMC Sierra Owner Manual - 2011
In Brief 1-11
Seat Adjustment
Manual Seats
To adjust the seat:
1. Lift the bar to unlock the seat.
2. Slide the seat to the desiredposition and release the bar.
3. Try to move the seat back and forth to be sure the seat is
locked in place.
See Seat Adjustment on page 3‑3
for more information.
Power Seats
To adjust a power seat, if equipped:
.Move the seat forward or
rearward by sliding the control
forward or rearward.
.If available, raise or lower the
front or rear part of the seat
cushion by moving the front or
rear of the control up or down.
.If available, raise or lower the
entire seat by moving the entire
control up or down.
See Power Seat Adjustment on
page 3‑4 for more information.
Lumbar Adjustment
Manual Lumbar
If equipped, increase or decrease
manual lumbar support by turning
the knob forward or rearward.
SeeLumbar Adjustment on
page 3‑6 for more information.
Page 18 of 594
Black plate (12,1)GMC Sierra Owner Manual - 2011
1-12 In Brief
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.
See Lumbar Adjustment on
page 3‑6 for more information.Reclining Seatbacks
Manual Reclining Seatbacks
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.
Page 19 of 594
Black plate (13,1)GMC Sierra Owner Manual - 2011
In Brief 1-13
To return the seatback to the upright
position:
1. Lift the lever fully withoutapplying pressure to the
seatback, and the seatback
will return to the upright position.
2. Push and pull on the seatback to make sure it is locked.
See Reclining Seatbacks on
page 3‑6 for more information. Power Reclining Seatbacks
To adjust a power seatback,
if equipped:
.Tilt the top of the control
rearward to recline.
.Tilt the top of the control forward
to raise.
See Reclining Seatbacks on
page 3‑6 for more information.
Memory Features
On vehicles with the memory
feature, the controls on the driver
door are used to program and recall
memory settings for the driver seat,
outside mirrors, and the adjustable
throttle and brake pedals, if the
vehicle has this feature.
Page 20 of 594

Black plate (14,1)GMC Sierra Owner Manual - 2011
1-14 In Brief
Storing Memory Positions
To save into memory:
1. Adjust the driver seat andseatback recliner, both outside
mirrors, and the throttle and
brake pedals, if available.
See Power Mirrors on page 2‑16
and Adjustable Throttle and
Brake Pedal on page 9‑35 for
more information.
Not all mirrors and adjustable
throttles and brake pedals will
have the ability to save and
recall their positions. 2. Press and hold
“1”until
two beeps sound.
3. Repeat for a second driver position using “2.”
To recall, press and release “1”
or “2.” The vehicle must be in
P (Park). A single beep will sound.
The seat, outside mirrors, and
adjustable throttle and brake pedals,
if available, will move to the position
previously stored for the identified
driver.
See “Memory Seat, Mirrors,
and Pedals” underPower Seat
Adjustment on page 3‑4 andVehicle
Personalization (with DIC Buttons)
on page 5‑52 for more information. Easy Exit Driver Seat
This feature can move the seat
rearward to allow extra room to
exit the vehicle.
B:
Press to recall the easy exit
seat position. The vehicle must be
in P (Park).
See “Memory Seat, Mirrors,
and Pedals” underPower Seat
Adjustment on page 3‑4 andVehicle
Personalization (with DIC Buttons)
on page 5‑52 for more information.
Page 21 of 594
Black plate (15,1)GMC Sierra Owner Manual - 2011
In Brief 1-15
Heated Seats
If available, the controls are on the
driver and passenger doors.
I:Press to heat the
seatback only.
J: Press to heat the seat and
seatback.
See Heated Front Seats on
page 3‑8.
Head Restraint
Adjustment
Do not drive until the head restraints
for all occupants are installed and
adjusted properly.
To achieve a comfortable seating
position, change the seatback
recline angle as little as necessary
while keeping the seat and the
head restraint height in the proper
position.
For more information see Head
Restraints on page 3‑2 andSeat
Adjustment on page 3‑3.
Safety Belts
Refer to the following sections for
important information on how to use
safety belts properly.
.Safety Belts on page 3‑11.
.How to Wear Safety Belts
Properly on page 3‑15.
.Lap-Shoulder Belt on page 3‑21.
.Lower Anchors and Tethers for
Children (LATCH System) on
page 3‑57.
Page 22 of 594

Black plate (16,1)GMC Sierra Owner Manual - 2011
1-16 In Brief
Sensing System for
Passenger Airbag
The passenger sensing system,
if equipped, turns off the right
front passenger frontal airbag
under certain conditions. The driver
airbags, seat‐mounted side impact
airbags and roof‐rail airbags are not
affected by this.
If the vehicle has one of the
indicators pictured in the following
illustrations, then the vehicle has a
passenger sensing system for the
right front passenger position unless
there is an airbag off switch located
in the glove box.
If there is an airbag off switch, the
vehicle does not have a passenger
sensing system. SeeAirbag On-Off
Switch on page 3‑37 for more
information. The passenger airbag status
indicator will be visible on the
overhead console when the
vehicle is started.
United States
Canada and Mexico
See Passenger Sensing System on
page 3‑40 for important information.
Mirror Adjustment
Exterior Mirrors
Vehicles with outside power mirrors
and foldaway mirrors have controls
located on the driver door.
1. Press (A) or (B) to select the
driver or passenger side mirror.
2. Press the arrows on the control pad to move the mirror up,
down, right, or left.
3. Press either (A) or (B) again to deselect the mirror.
Page 23 of 594

Black plate (17,1)GMC Sierra Owner Manual - 2011
In Brief 1-17
SeeManual Mirrors on page 2‑15 or
Power Mirrors on page 2‑16.
If the vehicle has towing mirrors,
they can be adjusted for a clearer
view of the objects behind you.
Manually pull out the mirror head to
extend it for better visibility when
towing a trailer. See Trailer-Tow
Mirrors on page 2‑15.
Power Foldaway Mirrors
To fold the mirrors:
1. Press (C) to fold the mirrors out
to the driving position.
2. Press (D) to fold the mirrors in to the folded position.
Manual Foldaway Mirrors
Manually fold the mirrors inward
to prevent damage when going
through an automatic car wash.
To fold, pull the mirror toward the
vehicle. Push the mirror outward,
to return to its original position.
See Folding Mirrors on page 2‑16.Interior Mirror
Vehicles with a manual rearview
mirror can be adjusted to see
clearly behind the vehicle. Hold the
mirror in the center to move it up or
down and side to side. To reduce
headlamp glare during nighttime
use, push the tab forward for
daytime use and pull it for
nighttime use.
Vehicles with the automatic dimming
feature will automatically reduce
the glare of lights from behind the
vehicle. The dimming feature comes
on and the indicator light illuminates
each time the vehicle is started.
SeeAutomatic Dimming Rearview
Mirror on page 2‑18 for more
information.
Steering Wheel
Adjustment
The tilt lever is located on the lower
left side of the steering column.
To adjust the steering wheel:
1. Hold the steering wheel and pull the lever.
2. Move the steering wheel up or down.
3. Release the lever to lock the wheel in place.
Do not adjust the steering wheel
while driving.
Page 24 of 594

Black plate (18,1)GMC Sierra Owner Manual - 2011
1-18 In Brief
Throttle and Brake Pedal
Adjustment
On vehicles with this feature, you
can change the position of the
throttle and brake pedals.
The control used to adjust the
pedals is located on the instrument
panel below the climate control
system.
Press the bottom of the control
to move the pedals closer to your
body. Press the top of the control
to move the pedals away.
SeeAdjustable Throttle and Brake
Pedal on page 9‑35.
Interior Lighting
Dome Lamps
The dome lamps are located in the
overhead console.
They come on when any door is
opened and turn off after all the
doors are closed.
Turn the instrument panel
brightness knob located below
the dome lamp override button,
clockwise to the farthest position to
manually turn on the dome lamps.
The dome lamps remain on until the
knob is turned counterclockwise. Dome Lamp Override
The dome lamp override button is
located next to the exterior lamps
control.
k:
Press the button in and the
dome lamps remain off when a door
is opened. Press the button again to
return it to the extended position so
that the dome lamps come on when
a door is opened.