warning GMC SIERRA 1500 2011 User Guide

Black plate (10,1)GMC Sierra Owner Manual - 2011
2-10 Keys, Doors and Windows
Doors
Rear Doors
(Extended Cab)
To open a rear access door from
the outside, first open the front door.
Then, use the handle located on the
front edge of the rear access door to
open it.The rear access door must be
closed before the front door can
close.
To open a rear access door from
the inside, first open the front door.
Then, use the handle located on
the inside of the rear access door
to open.
Tailgate
{WARNING
It is extremely dangerous to
ride on the tailgate, even when
the vehicle is operated at low
speeds. People riding on the
tailgate can easily lose their
balance and fall in response
to vehicle maneuvers. Falling
from a moving vehicle may
result in serious injuries or death.
Do not allow people to ride on the
tailgate. Be sure everyone in your
vehicle is in a seat and using a
safety belt properly.
On vehicles with a lock on the
tailgate, use the key to lock or
unlock the tailgate.

Black plate (15,1)GMC Sierra Owner Manual - 2011
Keys, Doors and Windows 2-15
Exterior Mirrors
Convex Mirrors
{WARNING
A convex mirror can make things,
like other vehicles, look farther
away than they really are. If you
cut too sharply into the right lane,
you could hit a vehicle on the
right. Check the inside mirror or
glance over your shoulder before
changing lanes.
The passenger side mirror is convex
shaped. A convex mirror's surface is
curved so more can be seen from
the driver seat.
Manual Mirrors
Adjust the outside mirrors for a
clearer view.
Using hood-mounted air deflectors
and add-on convex mirror
attachments could decrease
mirror performance.
Trailer-Tow Mirrors
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.
The lower portion of the mirror is
convex. A convex mirror's surface
is curved to see more from the
driver seat. The convex mirror can
be adjusted manually to the driver
preferred position for better vision.
The mirror may have a turn signal
arrow that flashes in the direction
of the turn or lane change.

Black plate (18,1)GMC Sierra Owner Manual - 2011
2-18 Keys, Doors and Windows
Interior Mirrors
Manual Rearview Mirror
Hold the mirror in the center to
move it for a clearer view of behind
your vehicle. Adjust the mirror to
avoid glare from the headlamps
behind you. Push the tab at the
bottom of the mirror forward
for daytime use and pull it for
nighttime use.
Automatic Dimming
Rearview Mirror
The vehicle may have an automatic
dimming inside rearview mirror.
Automatic dimming reduces the
glare from the headlamps of the
vehicle behind you. The dimming
feature comes on and the indicator
light illuminates each time the
ignition is turned to start.
O(On/Off):Press to turn the
dimming feature on or off. The vehicle may also have a Rear
Vision Camera (RVC). See
Rear
Vision Camera (RVC) on page 9‑78
for more information.
If the vehicle has RVC, the
Obutton
for turning the dimming feature on or
off will not be available.
Vehicles with OnStar have three
additional control buttons for the
OnStar system. See your dealer
for more information about OnStar
and how to subscribe to it. See the
OnStar Owner Guide for more
information about the services
OnStar provides.
Cleaning the Mirror
Do not spray glass cleaner directly
on the mirror. Use a soft towel
dampened with water.
Windows
{WARNING
Leaving children, helpless adults,
or pets in a vehicle with the
windows closed is dangerous.
They can be overcome by
the extreme heat and suffer
permanent injuries or even death
from heat stroke. Never leave a
child, a helpless adult, or a pet
alone in a vehicle, especially with
the windows closed in warm or
hot weather.

Black plate (19,1)GMC Sierra Owner Manual - 2011
Keys, Doors and Windows 2-19
The vehicle aerodynamics are
designed to improve fuel economy
performance. This may result in
a pulsing sound when either rear
window is down and the front
windows are up. To reduce the
sound, open either a front window
or the sunroof (if equipped).
Manual Windows
Turn the hand crank on each door
to manually raise or lower the
manual windows.
Power Windows
{WARNING
Leaving children in a vehicle with
the keys is dangerous for many
reasons. Children or others could
be badly injured or even killed.
They could operate the power
windows or other controls or
even make the vehicle move.
The windows will function and
they could be seriously injured or
killed if caught in the path of a
closing window. Do not leave
keys in a vehicle with children.
When there are children in the
rear seat use the window lockout
button to prevent unintentional
operation of the windows.
Crew Cab Shown
If the vehicle has power windows,
controls are located on each door.
The driver door has a switch for
the passenger and rear windows as
well. The power windows will work
when the ignition is in ON/RUN
or ACC/ACCESSORY, or when
Retained Accessory Power (RAP)
is active. See Retained Accessory
Power (RAP) on page 9‑40.
Push the switch down to lower the
window, and pull up the front of the
switch to raise the window.

Black plate (2,1)GMC Sierra Owner Manual - 2011
3-2 Seats and Restraints
Head Restraints
The front seats have adjustable
head restraints in the outboard
seating positions.
{WARNING
With head restraints that are
not installed and adjusted
properly, there is a greater
chance that occupants will suffer
a neck/spinal injury in a crash.
Do not drive until the head
restraints for all occupants are
installed and adjusted properly.
Adjust the head restraint so that the
top of the restraint is at the same
height as the top of the occupant's
head. This position reduces the
chance of a neck injury in a crash.Pull the head restraint up to raise it.
To lower the head restraint, press
the button, located on the top
of the seatback, and push the
restraint down.
Push down on the head restraint
after the button is released to make
sure that it is locked in place.
The head restraints are not
designed to be removed.
The rear seat has headrests that
can be adjusted up and down.

Black plate (3,1)GMC Sierra Owner Manual - 2011
Seats and Restraints 3-3
Front Seats
Seat Adjustment
{WARNING
You can lose control of the
vehicle if you try to adjust a
manual driver seat while the
vehicle is moving. The sudden
movement could startle and
confuse you, or make you push
a pedal when you do not want to.
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.

Black plate (6,1)GMC Sierra Owner Manual - 2011
3-6 Seats and Restraints
Lumbar Adjustment
Manual Lumbar
If equipped, increase or decrease
manual lumbar support by turning
the knob forward or rearward.
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 when reclined like this.
The shoulder belt cannot do its
job because it 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 cannot do its job
either. In a crash, the 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)

Black plate (7,1)GMC Sierra Owner Manual - 2011
Seats and Restraints 3-7
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.
Manual Reclining Seatbacks
{WARNING
You can lose control of the
vehicle if you try to adjust a
manual driver seat while the
vehicle is moving. The sudden
movement could startle and
confuse you, or make you push
a pedal when you do not want to.
Adjust the driver seat only when
the vehicle is not moving.
{WARNING
If either seatback is not locked, it
could move forward in a sudden
stop or crash. That could cause
injury to the person sitting there.
Always push and pull on the
seatbacks to be sure they are
locked.
To adjust a manual seatback:
1. Lift the lever.The seatback will automatically
fold forward.
2. To recline, move the seatback rearward to the desired position,
then release the lever to lock the
seatback in place.
3. Push and pull on the seatback to make sure it is locked.

Black plate (8,1)GMC Sierra Owner Manual - 2011
3-8 Seats and Restraints
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.Power Reclining Seatbacks
To recline a power seatback,
if equipped:
.Tilt the top of the control
rearward to recline.
.Tilt the top of the control forward
to raise.
Heated Front Seats
{WARNING
If you cannot feel temperature
change or pain to the skin, the
seat heater may cause burns
even at low temperatures.
To reduce the risk of burns,
people with such a condition
should use care when using
the seat heater, especially for
long periods of time. Do not
place anything on the seat that
insulates against heat, such
as a blanket, cushion, cover,
or similar item. This may cause
the seat heater to overheat.
An overheated seat heater may
cause a burn or may damage
the seat.

Black plate (10,1)GMC Sierra Owner Manual - 2011
3-10 Seats and Restraints
Rear Seats
Rear Seats (Extended
Cab Full Bench)
Folding the Rear Seat
Notice:Folding a rear seat with
the safety belts still fastened may
cause damage to the seat or the
safety belts. Always unbuckle
the safety belts and return them
to their normal stowed position
before folding a rear seat.
To fold the seat:
1. Pull up on the front of the seat cushion while pulling down on
the release strap under the seat
cushion.
2. Pull the seat cushion up until it latches with the seatback.
3. Pull forward on the seat cushion to make sure it is locked in
place. To unfold the seat:
1. Push the seat cushion rearward
while pulling the release strap
under the seat cushion. Pull
the seat cushion down until it
latches.
2. Pull up on the seat cushion to make sure it is locked in place.
Make sure the safety belts are
not twisted or caught in the seat
cushion.
{WARNING
A safety belt that is improperly
routed, not properly attached,
or twisted will not provide the
protection needed in a crash.
The person wearing the belt could
be seriously injured. After raising
the rear seatback, always check
to be sure that the safety belts
are properly routed and attached,
and are not twisted.