2013 GMC SIERRA tow

Black plate (23,1)GMC Sierra Owner Manual - 2013 - crc - 8/14/12
In Brief 1-23
Automatic Transfer Case
This transfer case knob is located
next to the steering column.
Each transfer case design offers
different drive options. The list
below describes the different drive
options that may be available.2
m(Two-Wheel-Drive High):
This
setting is used for driving in most
street and highway situations.
AUTO (Automatic Four-Wheel
Drive): This setting is ideal for use
when road surface traction
conditions are variable.
4
m(Four-Wheel High): Use the
Four-Wheel-Drive High position
when extra traction is needed, such
as on snowy or icy roads or in most
off-road situations.
N (Neutral): Shift the transfer case
to Neutral only when towing the
vehicle. See Recreational Vehicle
Towing on page 10‑87 orTrailer
Towing on page 9‑73. 4
n(Four-Wheel-Drive Low):
This
setting sends maximum power to all
four wheels. You might choose
Four-Wheel-Drive Low if you are
driving off-road in deep sand, deep
mud, deep snow, and while climbing
or descending steep hills.
See Four-Wheel Drive on
page 9‑38.

Black plate (1,1)GMC Sierra Owner Manual - 2013 - crc - 8/14/12
Keys, Doors, and Windows 2-1
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . 2-2
Remote Keyless Entry (RKE) System Operation . . . . . . . . . . . 2-2
Remote Vehicle Start . . . . . . . . . 2-4
Door Locks . . . . . . . . . . . . . . . . . . . 2-6
Power Door Locks . . . . . . . . . . . . 2-7
Delayed Locking . . . . . . . . . . . . . . 2-7
Automatic Door Locks . . . . . . . . . 2-7
Lockout Protection . . . . . . . . . . . . 2-8
Safety Locks . . . . . . . . . . . . . . . . . . 2-8
Doors
Rear Doors (Extended Cab) . . . . . . . . . . . . . . 2-8
Tailgate . . . . . . . . . . . . . . . . . . . . . . . 2-9
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . 2-10
Vehicle Alarm System . . . . . . . 2-10
Immobilizer . . . . . . . . . . . . . . . . . . 2-11
Immobilizer Operation . . . . . . . . 2-11
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . 2-13
Manual Mirrors . . . . . . . . . . . . . . . 2-13
Trailer-Tow Mirrors . . . . . . . . . . . 2-13
Power Mirrors . . . . . . . . . . . . . . . . 2-14
Folding Mirrors . . . . . . . . . . . . . . . 2-15
Heated Mirrors . . . . . . . . . . . . . . . 2-16
Park Tilt Mirrors . . . . . . . . . . . . . . 2-16
Interior Mirrors
Manual Rearview Mirror . . . . . . 2-16
Automatic Dimming Rearview Mirror . . . . . . . . . . . . . . . . . . . . . . . 2-17
Windows
Windows . . . . . . . . . . . . . . . . . . . . . 2-17
Manual Windows . . . . . . . . . . . . 2-18
Power Windows . . . . . . . . . . . . . 2-18
Rear Windows . . . . . . . . . . . . . . . 2-19
Sun Visors . . . . . . . . . . . . . . . . . . . 2-19
Roof
Sunroof (Extended Cab) . . . . . 2-20
Sunroof (Crew Cab) . . . . . . . . . 2-21
Keys and Locks
Keys
{WARNING
Leaving children in a vehicle with
the ignition key is dangerous and
children or others could be
seriously injured or killed. They
could operate the power windows
or other controls or make the
vehicle move. The windows will
function with the keys in the
ignition, and children or others
could be caught in the path of a
closing window. Do not leave
children in a vehicle with the
ignition key.

Black plate (13,1)GMC Sierra Owner Manual - 2013 - crc - 8/14/12
Keys, Doors, and Windows 2-13
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
If the vehicle has manual mirrors,
they can be adjusted by moving the
mirror up and down or left to right to
see a little of the side of the vehicle,
and have a clear view behind the
vehicle.
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 (15,1)GMC Sierra Owner Manual - 2013 - crc - 8/14/12
Keys, Doors, and Windows 2-15
Folding Mirrors
Crew Cab Premium Trim with
Power Folding Mirrors Shown, Other Models Similar
Power Folding
If equipped with power folding
mirrors:
1. Press (A) to fold the mirrors outto the driving position.
2. Press (B) to fold the mirrors in to the folded position. The mirrors may also include a
memory function that works with the
memory seats. See
Memory Seats
on page 3‑6 for more information.
Resetting the Power Folding
Mirrors
Reset the power folding mirrors if:
.The mirrors are accidentally
obstructed while folding.
.They are accidentally manually
folded/unfolded.
.The mirrors will not stay in the
unfolded position.
.The mirrors vibrate at normal
driving speeds.
Fold and unfold the mirrors one time
using the mirror controls to reset
them to their normal position.
A popping noise may be heard
during the resetting of the power
folding mirrors. This sound is normal
after a manual folding operation.
Manual Folding
If equipped with manual folding
mirrors, push the mirror toward the
vehicle. Push the mirror outward, to
return to its original position.
Manually fold the mirrors inward to
prevent damage when going
through an automatic car wash.
Automatic Dimming
If equipped with an automatic
dimming mirror, the driver outside
mirror automatically dimes for the
glare of the headlamps from behind.
This feature is controlled by the on
and off setting on the inside
rearview mirror.
See Automatic Dimming Rearview
Mirror on page 2‑17.
Turn Signal Indicator
The vehicle may also have a turn
signal indicator on the mirror. An
arrow on the mirror flashes in the
direction of the turn or lane change.

Black plate (16,1)GMC Sierra Owner Manual - 2013 - crc - 8/14/12
2-16 Keys, Doors, and Windows
Heated Mirrors
For vehicles with heated mirrors:
1(Rear Window Defogger):
Press to heat the mirrors. If the
vehicle has a towing mirror, only the
upper glass of the mirror is heated.
The lower convex part of the towing
mirror is not heated.
Depending on the vehicle's features,
see “Rear Window Defogger” under
Climate Control Systems (with Air
Conditioning) on page 8‑1 or
Climate Control Systems (with
Heater Only) on page 8‑4 orDual
Automatic Climate Control System
on page 8‑5 for more information.
Park Tilt Mirrors
If the vehicle has the memory
package, the passenger and/or
driver mirror tilts to a preselected
position when the vehicle is in
R (Reverse). This feature lets the
driver view the curb when parallel
parking. The mirror(s) return to the
original position when the vehicle is
shifted out of R (Reverse), or the
ignition is turned off or to
OFF/LOCK.
Turn this feature on or off through
the Driver Information Center (DIC).
SeeVehicle Personalization (With
DIC Buttons) on page 5‑46.
Interior Mirrors
Manual Rearview Mirror
To adjust the inside rearview mirror,
hold the rearview mirror in the
center and move it to view the area
behind the vehicle.
For vehicles with a manual rearview
mirror, push the tab forward for
daytime use and pull it rearward for
nighttime use to avoid glare from
the headlamps from behind.
Vehicles with OnStar
®have three
control buttons at the bottom of the
mirror. See a dealer for more
information about OnStar and how
to subscribe to it. See OnStar
Overview on page 14‑1.

Black plate (17,1)GMC Sierra Owner Manual - 2013 - crc - 8/14/12
Keys, Doors, and Windows 2-17
Automatic Dimming
Rearview Mirror
Adjustment
Hold the rearview mirror in the
center and move it to view the area
behind the vehicle.
Operation
For vehicles with an automatic
dimming rearview mirror, the mirror
will automatically reduce the glare of
the headlamps from behind. The
dimming feature comes on each
time the vehicle is started.
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 9‑60
If the vehicle has a RVC, the
O
button for turning the dimming
feature on or off will not be
available.
Vehicles with OnStar have three
additional control buttons located at
the bottom of the mirror. See a
dealer for more information about
OnStar and how to subscribe to it.
See OnStar Overview on page 14‑1.
Cleaning the Mirror
Do not spray glass cleaner directly
on the mirror. Use a soft towel
dampened with water.
Windows
{WARNING
Never leave a child, a helpless
adult, or a pet alone in a vehicle,
especially with the windows
closed in warm or hot weather.
They can be overcome by the
extreme heat and suffer
permanent injuries or even death
from heat stroke.

Black plate (9,1)GMC Sierra Owner Manual - 2013 - crc - 8/14/12
Seats and Restraints 3-9
Press the button once for the
highest setting. With each press of
the button, the seat will change to
the next lower setting, and then to
the off setting. The lights indicate
three for the highest setting and one
for the lowest.
The passenger seat may take
longer to heat up.
On vehicles with heated seats, the
heated seats are canceled
10 seconds after the ignition is
turned off.
On vehicles with heated and cooled
seats, the heated and cooled seats
are canceled when the ignition is
turned off.
To use this feature after restarting
the vehicle, press the desired button
again.Remote Start Heated Seats
When it is cold outside, the heated
seats may turn on automatically
during a remote vehicle start. The
heated seats will be canceled when
the ignition is turned on. Press the
desired button to use the heated
seats after the vehicle is started.
The lights on the heated seat
buttons do not turn on during a
remote start.
The temperature performance of an
unoccupied seat may be reduced.
This is normal.
See
Remote Vehicle Start on
page 2‑4.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.

Black plate (10,1)GMC Sierra Owner Manual - 2013 - crc - 8/14/12
3-10 Seats and Restraints
To fold the seat:
1. Pull up on the front of the seatcushion 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.
Rear Seats (All Split
Bench and Hybrid Full
Bench)
Folding Rear Seat
Either side of the rear seat can be
folded for added cargo space.
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.
Make sure that nothing is on
the seat.
To fold the seat, slowly pull the seat
cushion up.
To return the seat to the normal
seating position, slowly pull the seat
cushion down.
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.