GMC SIERRA 2021 Get To Know Guide

11
BLUETOOTH® SYSTEMF
F Optional equipment
Read your Owner’s Manual for important information about using the Bluetooth system while
driving.
Before using a Bluetooth-enabled device in the vehicle, it must be paired with the in-
vehicle Bluetooth system. The vehicle must be stopped to pair a device. Not all devices
will support all functions.
PAIR A PHONE
1. To use voice recognition, press the Press to Talk button; after the beep, say “Pair phone”; or to use the infotainment
screen, select the Phone icon > Phones or Connect Phone > Add Phone.
2. Start the pairing process on your phone. From the phone’s Bluetooth settings, select the name shown on the infotainment screen.
3. Follow the pairing ins tructions.
4. When pairing is complete, the phone screen is displayed.
SECONDARY PHONE
A secondary phone can be paired to the Bluetooth system. The system connects to the
phone that is set to First to Connect. The secondary phone can only receive calls.
To set the first and secondary phones, select the Phone icon > Phones > Information.See Infotainment System in your Owner’s Manual.
4G LTE WI-FI® HOTSPOTF
With the vehicle’s available built-in 4G LTE Wi-Fi hotspot, up to 7 devices (smartphones,
tablets and laptops) can be connected to high-speed internet.
To retrieve the name and password for the hotspot, select the Wi-Fi icon on the Home page or go to Settings > System > Wi-Fi Hotspot on the infotainment system.
For more information, call 1-855-478-7767 or visit my.gmc.com/how-to-support.
See Infotainment System in your Owner’s Manual.
WIRELESS CHARGINGF
The Wireless Charging system for smart -
phones is located on the center console. Visit
my.gmc.com/how-to-support to check device
compatibility. See your phone retailer for any
required phone accessories.
1. The vehicle must be on, or Retained Accessory Power must be active.
2. Remove all objects from the charging pad.
3. Place the device, face up, on the on the pad.
4. The charging symbol will appear on the infotainment screen when charging. If not
charging, remove the device for 3 seconds, and rotate it 180 degrees.
See Instruments and Controls in your Owner’s Manual.

12F Optional equipment
LIGHTING
LAMP CONTROLS
Rotate the knob to activate the exterior
lamps.
Off/On
AUTO
Automatically activates the exterior lamps
depending on outside lighting conditions.
Parking Lamps
Headlamps
Fog Lamps
Press to turn the fog lamps on/off.
Instrument Panel Brightness
Press and hold the +/– buttons to adjust
the instrument panel lighting.
Task LightingF
Press repeatedly to cycle through the forward-facing outside mirror lamp options: both lamps on, left lamp on, right lamp on, both lamps off.
Cargo LampF
With the vehicle in Park, Reverse, or
Neutral, press to cycle through the cargo
bed/hitch lamps and/or rear-facing mirror
lamps
F. The button indicator illuminates
when the cargo bed lamps are on.
INTELLIBEAM SYSTEMF
The IntelliBeam system automatically
turns the high-beam headlamps on/off
according to surrounding traffic when
the lamp control is in the AUTO or
position and the system is activated, indicated by a green on the instru -
ment cluster. A blue appears when
the high-beam headlamps are on.
To turn the IntelliBeam s ystem on or off, press the button on the end of
the turn signal lever with the lamp
control in the AUTO or
position.
Note: The fog lamps must be off to activate
the IntelliBeam system. IntelliBeam activates
the high-beam headlamps only when driving
over 25 mph.
See Lighting in your Owner’s Manual.
ADAPTIVE CRUISE CONTROLF
The system enhances regular Cruise
Control to maintain a driver-selected
following gap — the time between your vehicle and a vehicle detected directly
ahead — by accelerating or braking auto -
matically while you continue to steer.
Press and hold the Cancel button to
switch between regular Cruise Control and Adaptive Cruise Control.
Use the steering wheel controls to set and adjust Cruise Control or Adaptive Cruise Control.
With Adaptive Cruise Control active, press and release the Following Gap button
to select a gap setting of Far, Medium or Near.
See Driving and Operating in your Owner’s Manual.

13
TRACTION SELECT MODES
The Traction Select (Driver Mode) settings automatically adjust various vehicle con-
trol systems based on driving preferences,
weather and road conditions. The modes
are displayed on the Driver Information
Center.
Rotate the control knob (A) to the right to select a mode. Modes may include:
Normal – Use for normal driving.
Sport – Use for enhanced responsiveness on paved roads.
Snow (2WD only) – Use for enhanced traction during slippery conditions.
Off-Road (4WD only) – Use for enhanced control on unpaved roads or trails at moderate speeds.
Tow/Haul – Rotate the knob to the left; use to reduce shift cycling when towing or hauling heavy loads in stop-and-go traffic, rolling hills, or busy parking lots.
Terrain (4WD only) – Press the button for enhanced control in low-speed off-road conditions. The system automatically provides light vehicle braking to simulate engine vehicle braking. Only available with the single-speed transfer case when in4
4
2
.
FOUR-WHEEL DRIVE
Use the four-wheel drive buttons (B) on the
left side of the instrument panel to shift
into and out of four-wheel drive. The Driver
Informa tion Center dis plays the current status of the transfer case.
AUTO Automatic Four-Wheel Drive High
– Use when traction conditions vary for
automatic shifting between 2WD and 4WD.
Shift into this mode at any speed except
when shifting from4
4
2
.
44
2
Two-Wheel Drive High – Use for most
streets and highways. Shift into this mode at any speed except when shifting from
4
4
2
.
4
4
2
Four-Wheel Drive High – Use when extra traction is needed or in most off-road driving. Shift into this mode at any speed except when shifting from
44
2
.
44
2
Four-Wheel Drive LowF – Use when driving off-road in deep sand, mud or snow, or
on steep hills. Shift into or out of this mode when the vehicle is stopped or moving less
than 3 mph with the transmission in Neutral.
N Neutral – Use to dolly or dinghy tow the vehicle behind an RV. Neutral is not avail -
able with the single speed transfer case. Refer to your Owner’s Manual for the shift procedure.
See Driving and Operating in your Owner’s Manual.
F Optional equipment
TRACTION SELECT SYSTEMF/FOUR-WHEEL DRIVEF
4WD Model shown
B
A

14F Optional equipment
DRIVER ASSISTANCE SYSTEMSF
Safety or driver assistance features are not a substitute for the driver’s responsibility to operate
the vehicle in a safe manner. The driver should remain attentive to traffic, surroundings and
road conditions at all times. Read your Owner’s Manual for important feature limitations and
information.
SAFETY ALERT SEAT – The driver’s seat pulses — left side, right side or simultaneously
— to alert the driver of the direction of potential hazards.
Audible alerts or seat pulsing alerts may be selected. To change the alert settings, go to Settings > Vehicle > Collision/Detection Systems > Alert Type.
FORWARD COLLISION ALERT – The Vehicle Ahead Indicator is green when a vehicle is detected and is amber when following a vehicl e ahead much too closely. When approaching a vehicle directly ahead too rapidly, a red alert flashes on the windshield
and the Safety Alert Seat pulses or rapid beeps sound (if selected).
Press the Forward Collision Alert button on the steering wheel to set the alert
timing to Far, Medium, or Near.
FOLLOWING DISTANCE INDICATOR – The
following distance to the vehicle ahead is
indicated in seconds under the Info menu
on the Driver Information Center. If no vehicle is detected ahead, dashes are displayed.
AUTOMATIC EMERGENCY BRAKING – In
detected potential imminent collision situ -
ations with vehicles directly ahead, the
system can provide alerts and enhance driver braking or automatically apply hard emergency braking, if you have not already
done so, to help reduce the severity or help avoid collisions at very low speeds.
To set Automatic Emergency Braking and Forward Collision Alert to Alert and Brake,
Alert, or Off, go to Settings > Vehicle > Collision/Detection Systems > Forward
Collision System
FRONT PEDESTRIAN BRAKING – During daytime driving, the system can detect pedes -
trians directly ahead up to a distance of approximately 131 ft. and displays an amber
indicator. When approaching a detected pedestrian too quickly, a red alert flashes on the windshield and the Safety Alert Seat pulses or rapid beeps sound (if selected). The system may enhance driver braking or automatically apply hard emergency braking, if you have not already done so.
To set to Alert and Brake, Alert, or Off, go to Settings > Vehicle > Collision/Detection
Systems > Front Pedestrian Detection.
LANE CHANGE ALERT WITH SIDE BLIND ZONE ALERT – While driving, the system displays a warning symbol on the left or right side mirror when a moving vehicle
is detected rapidly approaching or in a side blind zone. The warning symbol flashes if a
turn signal is activated when a vehicle has been detected on the same side.
To turn on or off, go to Settings > Vehicle > Collision/Detection Systems > Lane
Change Alert.
See Driving and Operating in your Owner’s Manual.

15F Optional equipment
DRIVER ASSISTANCE SYSTEMSF
LANE KEEP ASSIST WITH LANE DEPARTURE WARNING – The system may help you
avoid collisions due to unintentional lane departures. The
Lane Keep Assist indicator
is green if the system is available to assist. If the vehicle approaches a detected lane
marking without using a turn signal in that direction, the system may assist by gently
turning the steering wheel and displaying an amber
.
If active driver steering is not detected, the amber may flash and the Safety Alert
Seat may pulse or beeps may sound (if selected) on the side of the departure direction
as the lane marking is crossed. In order to use this system safely, the driver needs to
steer and be in complete control of the vehicle.
To turn on or off, press the Lane Keep Assist button on the instrument panel.
FRONT AND REAR PARK ASSIST – During
low-speed parking maneuvers, the system
provides “distance to closest object” infor -
mation on the Driver Information Center
and the Safety Alert Seat pulses or a beep
sounds (if selected). When an object is very
close, the Safety Alert Seat pulses or a
continuous beep sounds (if selected).
To turn on or off, press the Park Assist button on the instrument panel.
REAR CROSS TRAFFIC ALERT – When the vehicle is in Reverse, the system warns of
detected cross-traffic approaching in either direction by displaying a red triangle with
directional arrow alert on the infotainment screen and pulsing the left or right side of
the Safety Alert Seat or sounding beeps (if selected).
To turn on or off, go to Settings > Vehicle > Collision/Detection Systems > Rear Cross
Traffic Alert.
See Driving and Operating in your Owner’s Manual.
REAR CAMERA MIRRORF
The rear camera mirror provides a wider, less obstructed field of view than a traditional
mirror to assist when driving, changing lanes and checking traffic conditions.
A.
On/Off
Pull or pu sh the lever at the bottom of the mirror to turn the video display on or off.
B. Selection Control
Press and release the button to select the brightness, zoom, or tilt setting.
C.
Adjustment
Press and release either button to adjust the selected setting.ABC
See Keys, Doors and Windows in your Owner’s Manual.

16F Optional equipment required
CAMERA SYSTEM FEATURES
The available camera systems feature up to 8 camerasF with up to 15 viewsF to help
make it easier to hitch a trailer and provide better visibility while towing.
REAR VISION CAMERA
When the vehicle is in Reverse, a view of the area behind the vehicle dis plays on the infotainment screen. Camera view buttonsF are on the screen.
Touch the Guidance Lines or Hitch Guid ance button to change gu idelines.
Touch the Hitch View button for a zoomed-in view of the hitch area.
SURROUND VISIONF
High-definition rear, front or side c amera views along with a view of the area surrounding the
vehicle are displayed on the infotainment screen
when the vehicle is in Reverse or Drive. Camera
view buttonsF are on the screen.
Touch the Guidance Lines or
Hitch Guidance button to change guidelines.
Touch the Bed View button to view the
bed to check cargo or to view guidelines to
help when hitching a 5th wheel or gooseneck
trailer. Zoom functionality also available.
To check the available camera views when in
Drive above 8 mph, touch the Camera icon on
the infotainment s creen and select the desired view. Touch X to exit the view.
ADDITIONAL TRAILER CAMERA VIEWSF
Multiple views to aid in trailering are shown on the infotainment screen using the vehicl e cameras and up to two additional wired acces-
sory camerasF mounted on the rear or interior of the trailer.
Touch the Rear Side View button for a
biased split view of each side of the trailer
(more of the left or right side will be shown
based on trailer position) and to view trailer
length when a turn signal is activated.
Touch the Transparent Trailer View button for a view behind the trailer.
Compatible with most conventional box
trailers; requires accessory cameraF.
Jack-Knife AlertF – The Jack-Knife Alert displays
a warning symbol when the truck/trailer angle is in a possible jack-knife position and
there is a potential imminent collision situation. The Safety Alert Seat
F may pulse or
beeps may sound.
Note: Accessory camera system compatible with most trailer and hitch types.
See Driving and Operating in your Owner’s Manual.
Surround Vision Rear Camera View screen
Bed View screen
Transparent Trailer View screen

17F Optional equipment
POWER MIRRORSF/TRAILERING MIRRORSF
POWER MIRROR ADJUSTMENT
Press the Mirror Selector button to select the driver or passenger side mirror; use the four-way control pad to adjust the mirror.
POWER FOLDING MIRROR
Press the Folding Mirror button to
fold or unfold the mirrors.
TRAILERING MIRRORS
The mirrors can be extended for better visibility when towing a trailer. The lower
wide-field view mirror adjusts manually.
To extend the manual mirror, grasp the
mirror housing and pull back and rear -
ward in one motion. The housing extends
on a curved arc. Push in the housing to
return the mirror to its original position.
Note: Reset the power mirrors if they are adjusted manually by using the power controls to fold/
unfold the mirrors to their normal position.
See Keys, Doors and Windows in your Owner’s Manual.
UNIVERSAL REMOTE SYSTEMF
The Universal Remote System on the overhead console enables your vehicle to control
3 different devices, ranging from garage doors and gates to home lighting. Go to
homelink.com for detailed videos and instructions on how to program the Universal
Remote System. For additional assistance, call 1-800-355-3515.
See Instruments and Controls in your Owner’s Manual.
HILL DESCENT CONTROLF
Hill Descent Control sets and maintains vehicle speed from 1–14 mph while descending
a steep incline in a forward or reverse gear.
1. Press the Hill Descent Control button on the center of the instrument panel.
Vehicle speed must be below 31 mph to enable the system. The
symbol will illuminate on the instrument cluster.
2. Increase or decrease speed by applying the accelerator or brake pedal or use the Cruise Control +/– buttons on the steering wheel. The adjusted speed becomes the
new set speed. The symbol flashes when the system is actively applying the
brakes to maintain vehicle speed.
See Driving and Operating in your Owner’s Manual.

18F Optional equipment
TRAILERINGF
PROGRADE TRAILERING SYSTEMF
The in-vehicle trailering app on the info-
tainment screen allows customized trailer
profiles with a variety of helpful towing
assistance features, including a hitching
and setup checklist, trailer tire pressure and
temperature monitoring
F, trailer light test-
ing, Jack-Knife Alert, trailer length indicator,
trailer theft detection and more. Trailering
App information also is available with the
myGMC mobile app.
Note: The Trailering App will monitor trailer presence, even while the vehicle is off, by periodically
checking the trailer lighting circuits. On trailers equipped with LED lights, these periodic checks may
cause the trailer lights to flash. This flashing will become more frequent if Theft Alert is enabled.
HITCH AREA LIGHTING
Press the Cargo Lamp button on the left side of the instrument panel to turn
the cargo bed lamp or conventional hitch lamp on/off.
TRAILERING INFORMATION LABEL
The Trailering information label, located by the driver’s door latch, provides vehicle-
specific weight information to help when loading the vehicle.
INTEGRATED TRAILER BRAKE CONTROL (ITBC)F
The ITBC system can be used to adjust the
power output, or Trailer Gain, to the trailer
brakes. The control panel is on the center
of the instrument panel. ITBC information
is displayed on the ITBC page on the Driver
Information Center.
Squeeze the control together (right s ide does not move) to manually apply the
trailer brakes.
Adjust the Trailer Gain by pressing the +/– adjustment buttons. See Driving and Operating in your Owner’s Manual.
TRUCK TIRE PRESSURE MONITORING SYSTEM
The Low Tire Pressure warning light on the instrument cluster illuminates when one
or more of the vehicle’s tires is significantly underinflated. Fill the tires to the proper tire
pressures listed on the Tire and Loading Information label, located below the driver’s
door latch. Current tire pressures can be viewed on the Driver Information Center.
With the ignition On or in Accessory mode, the Tire Fill Alert will provide visual and
audible alerts to help with inflating a tire to the recommended tire pressure (does not apply to spare tire). When the recommended pressure is reached, the horn sounds and
the turn signals change from flashing to solid.
Note: Refer to your Owner’s Manual for accessory trailer tire pressure monitoring system
information.
See Vehicle Care in your Owner’s Manual.

19
The tailgate has 6 functional positions to improve loading, unloading and access to the cargo box.
1. Primary Gate
Open the primary gate for ac cess to the cargo box.
2. Primary Gate Load Stop
With the primary gate open, the load stop helps keep longer items secure in the cargo box.
3. Easy Access
The inner ga te folds down for easier reach into the cargo box to access items near the cab.
4. Full-width Step
With the primary gate open, the inner gate folds into a sturdy step (up to 375 lbs.) with a conve-
nient handle for easy cargo box entry and exit.
5. Inner Gate Load Stop
With the primary gate closed, fold the inner gate for two-tier storage and open the load stop to
help keep longer items secure.
6. Inner Gate Work Surface
With the primary gate closed, fold the inner gate for two-tier storage or for use as a standing-
height work surface.
Note: Do not lower the inner gate with the primary gate
open if a hitch ball or trailer is attached.
OPEN THE INNER GATE
Press the upper button (A) on the tailgate.
OPEN THE PRIMARY GATE
Press the lower button (B) on the tailgate.
Press the Power Tailgate button twice on the
Remote Keyless Entry transmitter.
Press the Power Tailgate button on the center of the instrument panel.
OPEN THE PRIMARY
GATE AND INNER GATE
Press the lower button and then upper button
(B then A) on the tail -
gate consecutively.
OPEN THE LOAD STOP
OR STEP
Press the release bar (C).
GMC MULTIPRO TAILGATE OPERATIONF
F Optional equipmentSee Keys, Doors and Windows in your Owner’s Manual.
A
B
C
1
2
3
4
5
6

20
Download the myGMC app to your compatible smartphone (or device) and, if your vehicle is properly equipped, you can start or turn off your engine, lock or unlock your doors, view key diagnostic information, set parking information and more.
The app is available on select Apple and Android devices. Service availability, features and functionality vary by vehicle, device and data plan. Device data connection
required. Visit onstar.com for more details. Download the mobile app from your
compatible mobile device’s app store.
ROADSIDE ASSISTANCE
1-888-881-3302 TTY Users: 1-888-889-2438
As the owner of a new GMC, you are automatically enrolled in the GMC Roadside
Assistance program for up to 5 years/60,000 miles, whichever occurs first, at no
expense to you. GMC’s Roadside Assistance toll-free number is staffed by a team of
trained advisors who are available 24 hours a day, 365 days a year, to contact a service
provider for light services (fuel delivery, jump-starts, flat tire and lock-outs) or make
arrangements to tow your vehicle to the nearest GMC dealer for any repairs.
ONSTAR® ROADSIDE ASSISTANCE
If you have a current OnStar Safety & Security plan, push the blue OnStar button or red
Emergency button to get the help you need. An OnStar advisor will use GPS technology
to pinpoint your vehicle location and contact the nearest service provider.
To learn more about OnStar services, push the blue OnStar button, visit onstar.com, call
1-888-4-ONSTAR (1-888-466-7827), or refer to your Owner’s Manual.
GMC OWNER CENTER
Get to know your vehicle inside and out with the GMC Owner Center. Check out person -
alized information, including an online Owner’s Manual and helpful how-to videos, track
your service history and warranty status, manage your OnStar and Connected Services
vehicle plans, review your current Vehicle Diagnostics report (active service required)
and more. Create an account today at my.gmc.com.
MYGMC MOBILE APP
!84550395=A!84550395 A
We recommend always using ACDelco or GM Genuine Parts
Certain restrictions, precautions and safety procedures apply to your vehicle. Please read your Owner’s Manual
for complete instructions. All information contained in this guide is based on the latest information available at
the time of printing and is subject to change without notice. Copyright 2020 General Motors. All rights reserved.