2015 GMC SIERRA 1500 length

Black plate (38,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
3-38 Seats and Restraints
.Can proper safety belt fit be
maintained for the length of the
trip? If yes, continue. If no,
return to the booster seat.
If you have the choice, a child
should sit in a position with a
lap-shoulder belt and get the
additional restraint a shoulder
belt can provide.
Q: What is the proper way to wear safety belts?
A: An older child should wear a
lap-shoulder belt and get the
additional restraint a shoulder
belt can provide. The shoulder
belt should not cross the face or
neck. The lap belt should fit
snugly below the hips, just
touching the top of the thighs.
This applies belt force to the
child's pelvic bones in a crash.
It should never be worn over the
abdomen, which could cause
severe or even fatal internal
injuries in a crash. Also see
“Rear Safety Belt Comfort
Guides” underLap-Shoulder Belt on
page 3-14.
According to accident statistics,
children are safer when properly
restrained in a rear seating position.
In a crash, children who are not
buckled up can strike other people
who are buckled up, or can be
thrown out of the vehicle. Older
children need to use safety belts
properly.
{Warning
Never allow more than one child
to wear the same safety belt. The
safety belt cannot properly spread
the impact forces. In a crash, they
can be crushed together and
seriously injured. A safety belt
must be used by only one person
at a time.
{Warning
Never allow a child to wear the
safety belt with the shoulder belt
behind their back. A child can be
seriously injured by not wearing
the lap-shoulder belt properly. In a
crash, the child would not be
restrained by the shoulder belt.
The child could move too far
forward increasing the chance of
head and neck injury. The child
might also slide under the lap
(Continued)

Black plate (50,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
5-50 Instruments and Controls
Passive Door Unlock
This allows the selection of what
doors will unlock when using the
button on the driver door to unlock
the vehicle.
Select All Doors or Driver
Door Only.
Passive Door Lock
This feature can be turned on or off,
or can be used to select feedback
when using the button on the driver
door to lock the vehicle. See
Remote Keyless Entry (RKE)
System Operation on page 2-3.
Select Off, On with Horn
Chirp, or On.
Remote Left in Vehicle Alert
This feature sounds an alert when
the RKE transmitter is left in the
vehicle.
Select Off or On.Bluetooth
Select and the following may
display:
.Pair New Device
.Device Management
.Ringtones
.Voice Mail Numbers
Pair New Device
Select to pair a new device. See
“Pairing” in“Infotainment Controls”
under Bluetooth (Voice Recognition
- Base Radio) on page 7-35 or
Bluetooth (Voice Recognition - Base
Connected Radio) on page 7-44 or
Bluetooth (Overview) on page 7-29
or Bluetooth (Infotainment Controls -
Base Connected Radio) on
page 7-40 orBluetooth
(Infotainment Controls - Base
Radio) on page 7-31 or“Pairing” in
“Infotainment Controls” under
Bluetooth in the infotainment
manual. Device Management
Select to connect to a different
phone source, disconnect a phone,
or delete a phone.
Ringtones
Press to change the ring tone for
the specific phone. The phone does
not need to be connected to change
the ring tones.
Voice Mail Numbers
This feature displays the voice mail
number for all connected phones.
To change the voice mail number,
select EDIT or press the EDIT
button. Type a new number, then
select SAVE or press the SAVE
button.
Voice
Select and the following may
display:
.Prompt Length
.Audio Feedback Speed

Black plate (51,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
Instruments and Controls 5-51
Prompt Length
This feature adjusts the voice
prompt length.
Select Short or Long.
Audio Feedback Speed
This feature adjusts the audio
feedback speed.
Select Slow, Medium, or Fast.
Display
Select and the following may
display:
.Calibrate Touchscreen
.Turn Display Off
Calibrate Touchscreen
Select to calibrate the touchscreen,
then follow the prompts.
Turn Display Off
Select to turn the display off. Press
anywhere on the display area or any
faceplate button to turn the
display on.
Rear Camera
Select and the following may
display:
.Guidance Lines
.Rear Park Assist Symbols
Guidance Lines
Select to turn Off or On. See
Assistance Systems for Parking or
Backing on page 9-56.
Rear Park Assist Symbols
Select to turn Off or On. See
Assistance Systems for Parking or
Backing on page 9-56.
Return to Factory Settings
Select and the following may
display:
.Restore Vehicle Settings
.Clear All Private Data
.Restore Radio Settings Restore Vehicle Settings
This allows selection of restoring
vehicle settings.
Select Restore or Cancel.
Clear All Private Data
This allows selection to clear all
private information from the vehicle.
Select Delete or Cancel.
Restore Radio Settings
This allows selection to restore
radio settings.
Select Restore or Cancel.
Software Information
Select to view the infotainment
system current software information.

Black plate (28,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
7-28 Infotainment System
There are no restrictions if the
number of song files and albums is
less than 4,000. When the number
of song files connected to the
system is between 4,000 and 8,000,
the content cannot be accessed
directly with one command like
“Play .”
The restriction is that the command
“Play Song”must be spoken first;
the system will then ask for the song
name. The reply command would be
to say the name of the song to play.
Similar limits exist for album
content. If there are more than
4,000 albums, but less than 8,000,
the content cannot be accessed
directly with one command like,
“Play .” The
command “Play Album” must first be
spoken; the system will then ask for
the album name. The reply would
be to say the name of the album
to play. Once the number of songs has
exceeded approximately 8,000,
there is no support for accessing the
songs directly through voice
commands. There will still be
access to the media content by
using commands for playlists,
artists, and genres.
The access commands for playlists,
artists, and genres are prohibited
after the number of this type of
media exceeds 4,000.
The system will provide feedback
the first time voice recognition is
initiated if it has become apparent
that any of these limits are reached
during a device initializing process.
Voice Recognition for the
Phone
“Call ”:
Initiate a
call to an entered contact. The
command may include location if
the contact has location numbers
stored. “Call At Home,”
“At Work,” “On Mobile,”
or“On
Other”: Initiate a call to an entered
contact and location at home, at
work, on mobile device, or on
another phone.
“Call ”: Initiate a
call to a standard phone number
seven or 10 digits in length, and
also 911, 411, or 611.
“Pair Phone”: Begins the
Bluetooth pairing process. Follow
instructions on the radio display.
“Switch Phone”: Select a different
phone for outgoing calls.
“Voice Keypad”: Begins a dialog
to enter special numbers like
international numbers. The numbers
can be entered in groups of digits
with each group of digits being
repeated back by the system. If the
group of digits is not correct, the
command “Delete”will remove the
last group of digits and allow them
to be re-entered. Once the entire

Black plate (29,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
Driving and Operating 9-29
An internal thermostat in the
plug-end of the cord may exist,
which will prevent engine coolant
heater operation at temperatures
above−18°C (0°F).
If the vehicle has a diesel engine,
see the Duramax diesel
supplement.
To Use the Engine Coolant
Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord. The cord is
secured to the driver side fender
with a clip, next to the engine
compartment fuse block.
Carefully remove the wire tie
that bundles the electrical plug.
Do not cut the electrical cord.
3. Plug the cord into a normal, grounded 110-volt AC outlet.
{Warning
Plugging the cord into an
ungrounded outlet could cause an
electrical shock. Also, the wrong
kind of extension cord could
overheat and cause a fire. You
could be seriously injured. Plug
the cord into a properly grounded
three-prong 110-volt AC outlet.
If the cord will not reach, use a
heavy-duty three-prong extension
cord rated for at least 15 amps.
4. Before starting the engine, be sure to unplug and store the
cord as it was before to keep it
away from moving engine parts.
If you do not, it could be
damaged.
The length of time the heater should
remain plugged in depends on
several factors. Ask a dealer in the
area where you will be parking the
vehicle for the best advice on this.
Shifting Into Park
{Warning
It can be dangerous to get out of
the vehicle if the shift lever is not
fully in P (Park) with the parking
brake firmly set. The vehicle can
roll. If you have left the engine
running, the vehicle can move
suddenly. You or others could be
injured. To be sure the vehicle will
not move, even when you are on
fairly level ground, use the steps
that follow. With four-wheel drive,
if the transfer case is in
N (Neutral), the vehicle will be
free to roll, even if the shift lever
is in P (Park). Be sure the transfer
case is in a drive gear. If towing a
trailer, see Driving Characteristics
and Towing Tips on page 9-69.

Black plate (36,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
10-36 Vehicle Care
.The ignition key should come
out only in LOCK/OFF.
Contact your dealer if service is
required.
Park Brake and P (Park)
Mechanism Check
{Warning
When you are doing this check,
the vehicle could begin to move.
You or others could be injured
and property could be damaged.
Make sure there is room in front
of the vehicle in case it begins to
roll. Be ready to apply the regular
brake at once should the vehicle
begin to move. Park on a fairly steep hill, with the
vehicle facing downhill. Keeping
your foot on the regular brake, set
the parking brake.
.To check the parking brake's
holding ability: With the engine
running and the transmission in
N (Neutral), slowly remove foot
pressure from the regular brake
pedal. Do this until the vehicle is
held by the parking brake only.
.To check the P (Park)
mechanism's holding ability:
With the engine running, shift to
P (Park). Then release the
parking brake followed by the
regular brake.
Contact your dealer if service is
required.
Wiper Blade Replacement
Windshield wiper blades should be
inspected for wear or cracking. See
Maintenance Schedule on
page 11-3. Replacement blades come in
different types and are removed in
different ways. For proper
windshield wiper blade length and
type, see
Maintenance
Replacement Parts on page 11-14.
{Caution
Allowing the wiper arm to touch
the windshield when no wiper
blade is installed could damage
the windshield. Any damage that
occurs would not be covered by
your warranty. Do not allow the
wiper arm to touch the windshield.
To replace the windshield wiper
blade:
1. Pull the windshield wiper assembly away from the
windshield.