GMC SIERRA 2500 HEAVY DUTY 2023 User manual

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gmc.com
Review this quick reference guide for an overview of some important features in your GMC Sierra. Some equipment
described in this guide may not be included in your vehicle. Contact your dealer for details on a specic vehicle. 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. More information can be found in your Owner’s Manual and at gmc.com/owners. For easy
reference, keep this guide with your Owner’s Manual in your glove box.
Certain restrictions, precautions, and safety procedures apply to your vehicle.
Please read your Owner’s Manual for complete instructions.
GETTING TO KNOW YOUR
2023 SIERRA
2500 HEAVY DUTY/3500 HEAVY DUTY

2
INSTRUMENT PANEL
Engine
Start/Stop
Button
F
Cruise Control/Forward
Collision Alert
F
/Heated
Steering Wheel
F
Buttons
Electric
Parking
Brake
Switch
Power
Mirror
F
/
Window
Buttons
Driver
Information
Center
Controls
F
/Voice
Recognition
Buttons
Audio Volume
Control
(on back
of steering
wheel)
Steering Wheel
Adjustment
Lever
(on steering
column)
Audio Next/
Previous Favorite
Station Controls
(on back of
steering wheel)
Exterior/
Instrument
Panel/Cargo
Lamp Controls
4WD
Controls
F
/
Traction Select
Controls
Turn Signal/
Windshield
Wipers Lever
Range +/-
Gear Selection
Buttons (on
shift lever)
Driver
Information
Center
HUD Controls
F
(behind steering
wheel)
Low Fuel
Traction Control Off
Brake System
Cruise Control
StabiliTrak Active
StabiliTrak Off
Forward Collision Alert
Security
PARK Electric Parking Brake
Electric Parking Brake Service
Lights On Reminder
Airbag Readiness
Engine Oil Pressure
Check Engine
Lane Departure Warning
Symbols
Diesel model shown
Due to current supply-chain shortages, certain features shown have limited or late availability, or are no
longer available. See the window label or your dealer regarding the features on an individual vehicle.

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Read your Owner’s Manual to
learn about the information being
relayed by the lights, gauges and
indicators on the instrument cluster.
See Introduction in your
Owner’s Manual.
Driver’s Heated/
Ventilated Seat
Buttons
F
Infotainment
System (8-inch*
screen shown
F
)
Passenger’s Heated/
Ventilated Seat
Buttons
F
Infotainment
System
Controls Climate
Controls
F
USB Ports/
Accessory Power
Outlet/120-Volt
Power Outlet
F
Integrated
Trailer Brake
Control
F
Diesel Exhaust Brake
F
/
Lane Departure Warning
F
/
Park Assist
F
/Power
Release Tailgate
F
/Hazard
Warning Flashers Buttons
Traction Control-StabiliTrak
Off/Power Outlet
F
/Hill
Descent Control
F
/
Power Windows
F
Buttons
Vehicle Ahead
Antilock Brake System
Low Tire Pressure
Door Ajar
Charging System
Driver Seat Belt Reminder
2
Passenger Seat Belt
Reminder
AUTO
4WD Mode
F Optional equipment. *Screen measured diagonally. Some equipment shown may not be included in your vehicle.

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KEYLESS ACCESS SYSTEMF
REMOTE KEYLESS ENTRY TRANSMITTER (KEY FOB)F
The Keyless Access System enables operation of the doors and tailgate without
removing the Remote Keyless Entry transmitter (key fob) from your pocket or purse.
The key fob must be within 3 feet of the tailgate or the door being unlocked/locked.
KEYLESS UNLOCKING
With the key fob within range:
Press the button on the driver’s door
handle to unlock the driver’s door; press
again within 5 seconds to unlock all
doors and tailgate.
Press the button on a passenger door
handle to unlock all doors and tailgate.
Press the lower button on the tailgate to
lower the standard tailgate.
KEYLESS LOCKING
With the ignition o, the key fob removed from the vehicle, and all doors closed:
Press the button on any door handle to lock all doors and tailgate immediately.
If Passive Locking is turned on in the Settings menu, all doors will lock automatically
after a short delay.
Note: To change the lock settings, go to Settings > Vehicle > Remote Lock, Unlock, Start on the
infotainment screen.
See Keys, Doors and Windows in your Owner’s Manual.
Lock
Press to lock all doors
and tailgate.
Unlock
Press to unlock the
driver’s door or all doors
and tailgate.
Remote WindowsF
Press and hold the
Unlock button until the
windows are fully open. To enable, go to
Settings > Vehicle > Remote Lock, Unlock,
Start on the infotainment screen.
Remote MirrorsF
Press and hold the Lock/Unlock button
for 1 second to fold/unfold the power
mirrors. To enable, go to Settings >
Vehicle > Comfort and Convenience on
the infotainment screen.
Vehicle Locator/Panic Alarm
Press and release to locate your vehicle.
The exterior lamps ash and the horn
chirps 3 times
Press and hold to activate the alarm.
Press again to cancel the alarm.
Power Release TailgateF
Press twice to lower the tailgate.
Remote Vehicle StartF
Press and release the Lock button
and then press and hold the button
until the turn signal lamps ash to start
the engine from outside the vehicle. After
entering the vehicle, turn on the ignition.
To cancel a remote start, press and hold
the button until the parking lamps
turn o.
See Keys, Doors and Windows in your Owner’s Manual.
F Optional equipment Some equipment shown may not be included in your vehicle.

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STARTING THE VEHICLE
With the vehicle in Park or Neutral, rotate the key clockwise to
the Start position.
TURNING OFF THE VEHICLE
Shift to Park.
Push the key all the way in (1) and then rotate the key
counter-clockwise to the Lock/O position (2).
See Driving and Operating in your Owner’s Manual.
The Remote Keyless Entry transmitter (key fob) must be in the vehicle to turn on the
ignition.
STARTING THE ENGINE/ON
With the transmission in Park or Neutral,
press and hold the brake pedal and then
press the ENGINE START/STOP button
to start the engine. The green button
indicator will illuminate.
Note: If the key fob battery is weak, place the
key fob in the pocket in the center storage
compartment (under the bench seat) or center
console cupholders (bucket seats) to enable the
engine to start. Replace the key fob battery as
soon as possible.
STOPPING THE ENGINE/OFF
Shift to Park and then press the ENGINE START/STOP button to turn o the engine.
The green button indicator will turn o.
Power will be available for 10 minutes to operate the audio system until the driver’s
door is opened and to operate the windows and sunroof
F
until any door is opened.
ACCESSORY MODE
With the engine o and the brake pedal not depressed, press the ENGINE START/
STOP button to place the ignition in accessory mode. The amber button indicator will
illuminate. Press and hold the ENGINE START/STOP button for several seconds to
place the ignition in Service Mode to operate additional systems.
See Driving and Operating in your Owner’s Manual.
KEYLESS (PUSH-BUTTON) STARTF
KEYED IGNITION SYSTEM (IfEquIppEd)
F Optional equipment Some equipment shown may not be included in your vehicle.
2
1

6
DRIVER INFORMATION CENTER
MULTICOLOR HEAD-UP DISPLAYF
The Driver Information Center (DIC) on the instrument cluster displays a variety of
vehicle messages and system information.
BASE DIC CONTROL
Use the trip odometer reset stem on the
instrument cluster to access the DIC menu.
Turn the stem to scroll through the menu.
Press and hold the stem to reset an item.
MIDLEVEL AND UPLEVEL DIC CONTROLSF
Use the controls on the right side of the
steering wheel to view the various menus.
Press the or button to move
to a display zone.
Rotate the thumbwheel up or down to
move through the menus.
Press the thumbwheel to open a menu,
or to select or reset an item.
SELECT INFO PAGES
F
1. Use the controls to open the Options menu.
2. Scroll to Info Page Options. Press the thumbwheel to enter the menu.
3. Scroll through the list of items.
4. Press the thumbwheel to select or deselect an item to display in the Info menu.
See Instruments and Controls in your Owner’s Manual.
The Head-Up Display (HUD) projects some operating information
on the windshield. Temporary information, such as audio chang-
es and navigation directions, also may be displayed. The HUD
controls are located on the left side of the instrument panel.
HUD
HUD Position
Lift up or press down to adjust the position of
the image. It cannot be adjusted side to side.
INFO
Press to select from four displays:
• Speed View – Speedometer only
• Active Safety View – Speedometer and driver assistance information
• Navigation View – Speedometer and turn-by-turn navigation information
• O-Road View – Speedometer and o-road information (e.g., pitch angle, steering
angle and rolling angle),
Brightness
Lift up to brighten or press down to dim the display. Hold down to turn o the display.
See Instruments and Controls in your Owner’s Manual.
Midlevel and uplevel DIC Controls
F
shown
F Optional equipment Some equipment shown may not be included in your vehicle.

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CLIMATE CONTROLS/VEHICLE CONTROLSF
Dual automatic climate controls
F
shown
See Introduction in your Owner’s Manual.
AUTO
Driver’s Temp.
Control/Automatic
OperationF
SYNC
Passenger’s Temp.
Control/Synchronize
passenger’s setting to
driver’s settingF
AC/
Air Conditioning/
Recirculation
Mode
Fan
Speed/
On/Off
MAX
/
REAR
Defrost Mode/
Rear Window-
Heated Outside
Mirror DefogF
Air Delivery Modes:
Defog
Vent
Floor
Lane
Departure
Warning
On/OffF
Diesel
Exhaust Brake
On/OffF
Hill Descent
Control
On/OffF
Park Assist
On/OffF
Press to
lower the
tailgateF
Cargo Box
Power Outlet
On/OffF
(Ignition must
be On)
Hazard
Warning
Flashers
On/Off
Traction
Control/
StabiliTrak
On/Off
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 signicantly underinated. 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 provides visual and audible
alerts to help with inating 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 ashing 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.
F Optional equipment Some equipment shown may not be included in your vehicle.

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INFOTAINMENT SYSTEM
The infotainment system uses a Bluetooth or USB connection to link to a compatible
device, such as a smartphone or portable audio player/iPod®, and oers hands-free
voice control. For assistance, call 1-855-4-SUPPORT (1-855-478-7767) or visit
gmc.com/support.
MANAGING HOME PAGE ICONS
1. Press the Home button.
2. To enter edit mode, touch and hold the Home page icon to move.
3. Continue holding the icon and drag it to the desired position, and then release.
See Infotainment System in your Owner’s Manual.
Turn to tune stations
and highlight menu
items/Press to open
and select items
Home
page
Power/
Volume/Mute
SEEK
Previous/Next
radio station or
track
Read your Owner’s Manual for important information about using the infotainment system while
driving.
Additional Pages:
Swipe to display overview
page or additional pages
of apps (if available)
Applications
F
:
Touch a screen icon
to access an app
Applications Tray:
Shortcuts to
commonly
used apps
BACK
Move back one
level in the
menus
Uplevel infotainment system
F
shown
F Optional equipment Some equipment shown may not be included in your vehicle.

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INFOTAINMENT SYSTEM
STORING FAVORITES
Radio stations from all bands (AM, FM or
SiriusXMF) can be stored in any order. The
source options are on the left side of the
audio page.
1. Display the desired radio station.
2. Select the desired page of favorite
screen buttons.
3. Touch and hold one of the favorite
screen buttons until a beep is heard.
Favorites also can be stored by touching
★
in a station list.
SIRIUSXM WITH 360LF†
The personalized content of SiriusXM with 360L oers more than 200 channels,
including ad-free music, sports, comedy, talk and news, along with access to On
Demand shows, performances and interviews. Certain features require a SiriusXM
subscription and a Connected Access plan. See siriusxm.com and onstar.com for details
and limitations.
IN-VEHICLE APPS
In-vehicle apps oering entertainment, news, weather, travel information and more,
includ ing Amazon Alexa Built-in, are available on the infotainment screen or can be
downloaded through the Apps icon. Downloading and using the apps requires internet
connectivity, and may require a data plan, accessed through the vehicle’s available
4G LTE Wi-Fi Hotspot, if active, or a mobile hotspot. See onstar.com for data plan
information.
APPLE CARPLAY® AND ANDROID AUTO™F†
Apple CarPlay or Android Auto capability is available through a compatible phone using
the Apple CarPlay or Android Auto icon on the Home page.
1. Download the Android Auto app to your compatible phone from the Google Play
Store. No app is required for Apple CarPlay.
2. There are two ways to set up device projection:
• Wireless Connection – Connect your phone by pairing it to the in-vehicle Bluetooth
system. Turn on wireless Apple CarPlay or Android Auto in your phone’s settings.
• Wired Connection – Connect your phone to a USB data port using the USB cable
provided with your phone. Aftermarket USB cables may not work.
3. Follow the instructions on the infotainment system and the phone.
4. The Apple CarPlay or Android Auto icon will illuminate when connected. Touch the
icon to have your apps displayed.
To exit Apple CarPlay or Android Auto, press the Home button. To return
to Apple CarPlay or Android Auto, press and hold the Home button.
See Infotainment System in your Owner’s Manual.
F Optional equipment Some equipment shown may not be included in your vehicle.
†Android, Android Auto, Google, Google Play and Google Maps are trademarks of Google LLC. Apple CarPlay
is a trademark of Apple Inc. SiriusXM is a trademark of Sirius XM Radio Inc.

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BLUETOOTH® SYSTEMF
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.” 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 instructions.
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 rst 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. For more information on
use and limitations, visit gmc.com/support.
To retrieve the name and password for the hotspot, select the Wi-Fi Hotspot icon or
go to Settings > System > Wi-Fi Hotspot on the infotainment system.
See Infotainment System in your Owner’s Manual.
WIRELESS PHONE CHARGINGF
The Wireless Phone Charging system is
located at the front of the center console.
To check device compatibility, visit
gmc.com/support. See your phone retailer for
details on 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 phone, screen up, on the on
the pad.
4. The charging symbol will appear on the infotainment screen when charging. If not
charging, remove the phone for 3 seconds, and rotate it 180 degrees.
See Instruments and Controls in your Owner’s Manual.
F Optional equipment Some equipment shown may not be included in your vehicle.