key GMC SIERRA 1500 2012 Service Manual

Black plate (46,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
5-46 Instruments and Controls
Several conditions may cause this
message to appear. SeeTire
Pressure Monitor Operation on
page 10‑62 for more information.
If the warning comes on and stays
on, there may be a problem with the
TPMS. See your dealer.
TIRE LEARNING ACTIVE
If the vehicle has the Tire Pressure
Monitor System (TPMS), this
message displays when the system
is re-learning the tire positions on
your vehicle. The tire positions must
be re-learned after rotating the tires
or after replacing a tire or sensor.
See Tire Inspection on page 10‑65,
Tire Rotation on page 10‑65, Tire
Pressure Monitor System on
page 10‑60, and Tire Pressure on
page 10‑58 for more information.
TIRE LOW ADD AIR TO TIRE
If the vehicle has the Tire Pressure
Monitor System (TPMS), this
message displays when the
pressure in one or more of the
vehicle's tires is low. This message also displays LEFT FRT (left front),
RIGHT FRT (right front), LEFT RR
(left rear), or RIGHT RR (right rear)
to indicate the location of the low
tire. The low tire pressure warning
light will also come on. See
Tire
Pressure Light on page 5‑27. You
can receive more than one tire
pressure message at a time. To
read the other messages that may
have been sent at the same time,
press the set/reset button or the
trip odometer reset stem. If a tire
pressure message appears on the
DIC, stop as soon as you can. Have
the tire pressures checked and set
to those shown on the Tire Loading
Information label. See Tires on
page 10‑50, Vehicle Load Limits on
page 9‑16, and Tire Pressure on
page 10‑58. The DIC also shows
the tire pressure values. See Driver
Information Center (DIC) on
page 5‑30.
Transmission Messages
SERVICE 4 WHEEL DRIVE
If the vehicle has four-wheel
drive, this message may display
if a problem occurs with the
four-wheel-drive system. If this
message appears, stop as soon as
possible and turn off the vehicle.
Make sure the key is in the LOCK/
OFF position for at least one minute
and then restart the vehicle and
check for the message on the DIC
display. If the message is still
displayed or appears again
when you begin driving, the
four-wheel-drive system needs
service. See your dealer.

Black plate (50,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
5-50 Instruments and Controls
Press the customization button until
AUTO DOOR UNLOCK appears on
the DIC display. Press the set/reset
button once to access the settings
for this feature. Then press the
customization button to scroll
through the following settings:
OFF:None of the doors will
automatically unlock.
DRIVER AT KEY OUT: Only the
driver door will unlock when the key
is taken out of the ignition.
DRIVER IN PARK: Only the driver
door will unlock when the vehicle is
shifted into P (Park).
ALL AT KEY OUT: All of the doors
will unlock when the key is taken
out of the ignition.
ALL IN PARK (default): All of the
doors will unlock when the vehicle is
shifted into P (Park).
NO CHANGE: No change will be
made to this feature. The current
setting will remain. To select a setting, press the set/
reset button while the desired
setting is displayed on the DIC.
REMOTE DOOR LOCK
This feature allows you to select the
type of feedback received when
locking the vehicle with the Remote
Keyless Entry (RKE) transmitter.
You will not receive feedback when
locking the vehicle with the RKE
transmitter if the doors are open.
See
Remote Keyless Entry (RKE)
System Operation on page 2‑3 for
more information.
Press the customization button until
REMOTE DOOR LOCK appears on
the DIC display. Press the set/reset
button once to access the settings
for this feature. Then press the
customization button to scroll
through the following settings:
OFF: There will be no feedback
when you press the lock button on
the RKE transmitter. LIGHTS ONLY:
The exterior lamps
will flash when you press the lock
button on the RKE transmitter.
HORN ONLY: The horn will sound
on the second press of the lock
button on the RKE transmitter.
HORN & LIGHTS (default): The
exterior lamps will flash when you
press the lock button on the RKE
transmitter, and the horn will sound
when the lock button is pressed
again within five seconds of the
previous command.
NO CHANGE: No change will be
made to this feature. The current
setting will remain.
To select a setting, press the set/
reset button while the desired
setting is displayed on the DIC.
REMOTE DOOR UNLOCK
This feature allows you to select the
type of feedback received when
unlocking the vehicle with the
Remote Keyless Entry (RKE)
transmitter. You will not receive
feedback when unlocking the

Black plate (51,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Instruments and Controls 5-51
vehicle with the RKE transmitter if
the doors are open. SeeRemote
Keyless Entry (RKE) System
Operation on page 2‑3 for more
information.
Press the customization button until
REMOTE DOOR UNLOCK appears
on the DIC display. Press the set/
reset button once to access the
settings for this feature. Then press
the customization button to scroll
through the following settings:
LIGHTS OFF: The exterior lamps
will not flash when you press the
unlock button on the RKE
transmitter.
LIGHTS ON (default): The exterior
lamps will flash when you press the
unlock button on the RKE
transmitter.
NO CHANGE: No change will be
made to this feature. The current
setting will remain.
To select a setting, press the set/
reset button while the desired
setting is displayed on the DIC. DELAY DOOR LOCK
On vehicles with a crew cab, this
feature turns the delayed door locks
on or off. When locking the doors
with the power door lock switch and
a door is open, this feature will
delay locking the doors until
five seconds after the last door is
closed. You will hear three chimes
to signal that the delayed locking
feature is in use. The key must be
out of the ignition for this feature to
work. You can temporarily override
delayed locking by pressing the
power door lock switch twice. See
Delayed Locking on page 2‑8
for
more information.
Press the customization button until
DELAY DOOR LOCK appears on
the DIC display. Press the set/reset
button once to access the settings
for this feature. Then press the
customization button to scroll
through the following settings:
OFF: There will be no delayed
locking of the vehicle's doors. ON (default):
The doors will not
lock until five seconds after the last
door is closed.
NO CHANGE: No change will be
made to this feature. The current
setting will remain.
To select a setting, press the set/
reset button while the desired
setting is displayed on the DIC.
EXIT LIGHTING
This feature allows you to select
the amount of time you want the
exterior lamps to remain on when
it is dark enough outside. This
happens after the key is turned from
ON/RUN to LOCK/OFF.
Press the customization button until
EXIT LIGHTING appears on the DIC
display. Press the set/reset button
once to access the settings
for this feature. Then press the
customization button to scroll
through the following settings:
OFF: The exterior lamps will not
turn on.

Black plate (52,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
5-52 Instruments and Controls
30 SECONDS (default):The
exterior lamps will stay on for
30 seconds.
1 MINUTE: The exterior lamps will
stay on for one minute.
2 MINUTES: The exterior lamps will
stay on for two minutes.
NO CHANGE: No change will be
made to this feature. The current
setting will remain.
To select a setting, press the set/
reset button while the desired
setting is displayed on the DIC.
APPROACH LIGHTING
This feature allows you to select if
the exterior lights turn on briefly
during low light periods after
unlocking the vehicle using the
Remote Keyless Entry (RKE)
transmitter. Press the customization button until
APPROACH LIGHTING appears on
the DIC display. Press the set/reset
button once to access the settings
for this feature. Then press the
customization button to scroll
through the following settings:
OFF:
The exterior lights will not
turn on when you unlock the vehicle
with the RKE transmitter.
ON (default): If it is dark enough
outside, the exterior lights will turn
on briefly when you unlock the
vehicle with the RKE transmitter.
The lights will remain on for
20 seconds, until the lock button
on the RKE transmitter is pressed,
or until the vehicle is no longer off.
See Remote Keyless Entry (RKE)
System Operation on page 2‑3 for
more information.
NO CHANGE: No change will be
made to this feature. The current
setting will remain. To select a setting, press the set/
reset button while the desired
setting is displayed on the DIC.
CHIME VOLUME
If available, this feature allows you
to select the volume level of the
chime.
Press the customization button until
CHIME VOLUME appears on the
DIC display. Press the set/reset
button once to access the settings
for this feature. Then press the
customization button to scroll
through the following settings:
NORMAL:
The chime volume will
be set to a normal level.
LOUD: The chime volume will be
set to a loud level.
NO CHANGE: No change will be
made to this feature. The current
setting will remain.
There is no default for chime
volume. The volume will stay at the
last known setting.

Black plate (53,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Instruments and Controls 5-53
To select a setting, press the set/
reset button while the desired
setting is displayed on the DIC.
PARK TILT MIRRORS
If the vehicle has this feature, it
allows you to select if the outside
mirror(s) will automatically tilt down
when the vehicle is shifted into
R (Reverse). SeePark Tilt Mirrors
on page 2‑17 for more information.
Press the customization button until
PARK TILT MIRRORS appears on
the DIC display. Press the set/reset
button once to access the settings
for this feature. Then press the
customization button to scroll
through the following settings:
OFF (default): Neither outside
mirror will be tilted down when the
vehicle is shifted into R (Reverse).
DRIVER MIRROR: The driver
outside mirror will be tilted down
when the vehicle is shifted into
R (Reverse). PASSENGER MIRROR:
The
passenger outside mirror will be
tilted down when the vehicle is
shifted into R (Reverse).
BOTH MIRRORS: The driver and
passenger outside mirrors will be
tilted down when the vehicle is
shifted into R (Reverse).
NO CHANGE: No change will be
made to this feature. The current
setting will remain.
To select a setting, press the set/
reset button while the desired
setting is displayed on the DIC.
EASY EXIT RECALL
If the vehicle has this feature, it
allows you to select your preference
for the automatic easy exit seat
feature. See Memory Seats on
page 3‑7 for more information. Press the customization button until
EASY EXIT RECALL appears on
the DIC display. Press the set/reset
button once to access the settings
for this feature. Then press the
customization button to scroll
through the following settings:
DOOR BUTTON ONLY:
No
automatic seat exit recall will occur.
The recall will only occur after
pressing the easy exit seat button.
BUTTON & KEY OUT (default): If
the features are enabled through
the EASY EXIT SETUP menu, the
driver seat will move back when the
key is removed from the ignition or
the easy exit seat button is pressed.
The automatic easy exit seat
movement will only occur one time
after the key is removed from the
ignition. If the automatic movement
has already occurred, and you put
the key back in the ignition and
remove it again, the seat will stay in
the original exit position, unless a
memory recall took place prior to
removing the key again.

Black plate (54,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
5-54 Instruments and Controls
NO CHANGE:No change will be
made to this feature. The current
setting will remain.
To select a setting, press the set/
reset button while the desired
setting is displayed on the DIC.
EASY EXIT SETUP
If the vehicle has this feature, it
allows you to select which areas will
recall with the automatic easy exit
seat feature. It also allows you to
turn off the automatic easy exit
feature. See Memory Seats on
page 3‑7 and EASY EXIT RECALL
earlier for more information.
Press the customization button until
EASY EXIT SETUP appears on the
DIC display. Press the set/reset
button once to access the settings
for this feature. Then press the
menu up/down button to scroll
through the following settings:
OFF: No automatic seat exit will
recall.
SEAT ONLY (default): The driver
seat will recall. NO CHANGE:
No change will be
made to this feature. The current
setting will remain.
To select a setting, press the set/
reset button while the desired
setting is displayed on the DIC.
MEMORY SEAT RECALL
If the vehicle has this feature, it
allows you to select your preference
for the remote memory seat recall
feature. See Memory Seats on
page 3‑7 for more information.
Press the customization button until
MEMORY SEAT RECALL appears
on the DIC display. Press the set/
reset button once to access the
settings for this feature. Then press
the customization button to scroll
through the following settings:
OFF (default): No remote memory
seat recall will occur.
ON: The driver seat and, on some
vehicles, the outside mirrors will
automatically move to the stored
driving position when the unlock
button on the Remote Keyless Entry (RKE) transmitter is pressed.
On some vehicles with the
adjustable throttle and brake pedal
feature, the pedals will also
automatically move.
NO CHANGE:
No change will be
made to this feature. The current
setting will remain.
To select a setting, press the set/
reset button while the desired
setting is displayed on the DIC.
REMOTE START
If your vehicle has this feature, it
allows you to turn the remote start
off or on. The remote start feature
allows you to start the engine from
outside of the vehicle using the
Remote Keyless Entry (RKE)
transmitter. See Remote Vehicle
Start on page 2‑5 for more
information.

Black plate (9,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Lighting 6-9
Lighting Features
Entry Lighting
The vehicle has an illuminated entry
feature.
When the doors are opened, the
dome lamps will come on if the
dome override button is in the
extended position. If the dome
override button is pressed in, the
lamps will not come on.
Exit Lighting
The interior lamps come on when
the key is removed from the ignition.
They turn off automatically in
20 seconds. The lights do not come
on if the dome override button is
pressed in.
Battery Load
Management
The vehicle has Electric Power
Management (EPM) that estimates
the battery's temperature and state
of charge. It then adjusts the voltage
for best performance and extended
life of the battery.
When the battery's state of charge
is low, the voltage is raised slightly
to quickly bring the charge back up.
When the state of charge is high,
the voltage is lowered slightly to
prevent overcharging. If the vehicle
has a voltmeter gauge or a voltage
display on the Driver Information
Center (DIC), you may see the
voltage move up or down. This is
normal. If there is a problem, an
alert will be displayed.The battery can be discharged at
idle if the electrical loads are very
high. This is true for all vehicles.
This is because the generator
(alternator) may not be spinning fast
enough at idle to produce all of
the power needed for very high
electrical loads.
A high electrical load occurs when
several of the following are on, such
as: headlamps, high beams, fog
lamps, rear window defogger,
climate control fan at high speed,
heated seats, engine cooling fans,
trailer loads, and loads plugged into
accessory power outlets.
EPM works to prevent excessive
discharge of the battery. It does this
by balancing the generator's output
and the vehicle's electrical needs.
It can increase engine idle speed to
generate more power whenever
needed. It can temporarily reduce
the power demands of some
accessories.

Black plate (6,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
7-6 Infotainment System
Press to display additional text
information related to the current
FM-RDS or XM station; or CD, MP3,
or WMA song. If information is
available during XM, CD, MP3,
or WMA playback, the song title
information displays on the top line
of the display and artist information
displays on the bottom line. When
information is not available,“NO
INFO” displays.
Speed Compensated Volume
(SCV): Radios with Speed
Compensated Volume (SCV)
automatically adjust the radio
volume to compensate for road and
wind noise as the vehicle's speed
changes while driving, so that the
volume level stays consistent. To activate SCV:
1. Set the radio volume to the
desired level.
2. Press the MENU button to display the radio setup menu.
3. Press the softkey under the AUTO VOLUM (automatic
volume) tab on the radio display.
4. Press the softkey under the desired Speed Compensated
Volume setting (OFF, Low, Med,
or High) to select the level of
radio volume compensation.
The display times out after
approximately 10 seconds. Each
higher setting allows for more
radio volume compensation at
faster vehicle speeds.Setting the Tone (Bass/Treble)
(AM-FM Radio and AM-FM
Radio with CD)
To adjust the bass or treble:
1. Press the
fknob until Bass or
Treble displays.
2. To adjust the setting, do one of the following:
.Turn thefknob.
.Press either¨SEEK,
or
©SEEK.
.Press either\FWD,
or
sREV.

Black plate (7,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Infotainment System 7-7
EQ (Equalization):Press this
button to choose bass and treble
equalization settings designed for
different types of music. Selecting
MANUAL, or changing bass or
treble, returns the EQ to the manual
bass and treble settings.
Unique EQ settings can be saved
for each source.
Setting the Tone (Bass/
Midrange/Treble) (All Except
AM-FM Radio and Radio
with CD)
BASS/MID/TREB (Bass, Midrange,
or Treble): To adjust the bass,
midrange, or treble:
1. Press the
fknob until the tone
control tabs display.
2. Highlight the desired tone control tab by doing one of the
following:
.Press thefknob.
.Press the softkey under the
desired tab. 3. Adjust the setting by doing one
of the following:
.Turn thefknob clockwise
or counterclockwise.
.Press the¨SEEK,
or
©SEEK.
.Press the\FWD,
or
sREV.
If a station's frequency is weak or if
there is static, decrease the treble.
To quickly adjust bass, midrange,
or treble to the middle position,
press the softkey positioned under
the BASS, MID, or TREB tab for
more than two seconds. A beep
sounds and the level adjusts to the
middle position. To quickly adjust all tone and
speaker controls to the middle
position, press the
fknob for more
than two seconds until a beep
sounds.
EQ (Equalization): Press this
button to choose bass and treble
equalization settings designed for
different types of music. Selecting
MANUAL, or changing bass or
treble, returns the EQ to the manual
bass and treble settings.
Unique EQ settings can be saved
for each source.
If the radio has a Bose
®audio
system, the EQ settings are either
MANUAL or TALK.

Black plate (8,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
7-8 Infotainment System
Adjusting the Speakers
(Balance/Fade) (AM-FM Radio
and AM-FM Radio with CD)
To adjust the balance or fade:
1. Press
`or press thefknob
until the speaker control label
displays.
2. To adjust the setting, do one of the following:
.Turn thefknob.
.Press either¨SEEK,
or
©SEEK.
.Press either\FWD,
or
sREV.
Adjusting the Speakers
(Balance/Fade) (All Except
AM-FM Radio and Radio
with CD)
BAL/FADE (Balance/Fade): To
adjust the balance or fade:
1. Press the
fknob until the
speaker control tabs display.
2. Highlight the desired speaker control tab by doing one of the
following:
.Press thefknob.
.Press the softkey under the
desired tab.
3. Adjust the setting by doing one of the following:
.Turn thefknob clockwise
or counterclockwise.
.Press the¨SEEK,
or
©SEEK.
.Press the\FWD,
or
sREV. To quickly adjust all speaker and
tone controls to the middle position,
press the
fknob for more than
two seconds.
If the Rear Seat Audio (RSA) is
turned on, the radio disables FADE
and mutes the rear speakers.
Radio Messages
Calibration Error: The audio
system has been calibrated
for the vehicle from the factory.
If Calibration Error displays, it
means that the radio has not been
configured properly for the vehicle
and it must be returned to your
dealer for service.
Locked or Loc: One of these
messages will display when the
THEFTLOCK
®system has locked
up the radio. Take the vehicle to
your dealer for service.
If any error occurs repeatedly or
if an error cannot be corrected,
contact your dealer.