GMC SIERRA 1500 2020 / 2500HD 2020 / 3500HD 2020 / DENALI 1500 2020 Manual

INSTRUMENT PANEL

LD gasoline model shown

Symbols

Refer to 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.

Optional equipment

REMOTE KEYLESS ENTRY TRANSMITTER (KEY FOB)

Lock
Press to lock all doors and tailgate.

Unlock
Press to unlock the driver's door. Press again to unlock all doors and tailgate. Press and hold until the windows are fully open. To enable, go to Settings > Vehicle > Remote Lock, Unlock, Start. 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.

Power Release Tailgate
Press twice to lower the tailgate.

Vehicle Locator/Panic Alarm
Press and release to locate your vehicle. The exterior lamps flash and the horn chirps 3 times.
Press and hold to activate the alarm. Press again to cancel the alarm.

Remote Vehicle Start
Press and release the Lock button and then press and hold the button until the turn signal lamps flash 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 off.

See Keys, Doors and Windows in your Owner's Manual.

KEYLESS ACCESS SYSTEM

The Keyless Access System enables operation of the doors and tailgate without removing the Remote Keyless Entry (RKE) transmitter from your pocket or purse. The transmitter must be within 3 feet of the tailgate or the door being unlocked.

KEYLESS UNLOCKING
With the transmitter within range:

• Press the button on the driver's door handle to unlock the driver's door; press it 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 off, the transmitter 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, all doors will lock automatically after a short delay.

Note: To change the door lock and unlock settings, go to Settings > Vehicle > Remote Lock, Unlock, Start.
See Keys, Doors and Windows in your Owner's Manual.

KEYED IGNITION SYSTEM (If equipped)

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/Off position (2).
  

See Driving and Operating in your Owner's Manual.

KEYLESS (PUSHBUTTON) START

The Remote Keyless Entry transmitter 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 Remote Keyless Entry transmitter battery is weak, place the transmitter 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 transmitter battery as soon as possible.

STOPPING THE ENGINE/OFF

• Shift to Park and press the ENGINE START/STOP button to turn off the engine. The green button indicator will turn off. 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 until any door is opened.

ACCESSORY MODE

• With the engine off 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.

See Driving and Operating in your Owner's Manual.

AUTO ENGINE STOP/START OPERATION (LD MODEL)

To help conserve fuel, the auto engine stop/start system may automatically stop the engine, if operating conditions are met, when the brake pedal is pressed and the vehicle is at a complete stop. The tachometer gauge will read AUTO STOP. The audio system, climate controls and other accessories will continue to operate. When the brake pedal is released or the accelerator pedal is pressed, the engine will automatically restart. After parking the vehicle and turning off the engine, the tachometer gauge will read OFF.
The engine may remain running or restart when the vehicle is stopped if:

• A minimum vehicle speed is not reached.
• The engine or transmission is not at the required operating temperature.
• The outside temperature is not in the required operating range.
• The shift lever is in any gear other than Drive (D).
• The battery charge is low.
• The climate control system requires the engine to run based on the current settings.
• The Auto Stop has reached the maximum allowed time.

AUTO ENGINE STOP/START DISABLE

• Press the button on the center of the instrument panel when the engine is running to disable the auto engine stop/start system. The button indicator will turn off.

The auto engine stop/start system is enabled each time the vehicle is started.
See Driving and Operating in your Owner's Manual.

STEERING WHEEL ADJUSTMENT

• With the vehicle parked, pull the lever under the steering column to adjust the steering wheel up or down and closer or farther away.
  Push up the lever to lock the steering wheel in place.
  

See Instruments and Controls in your Owner's Manual.

POWER FRONT SEATS

SEAT ADJUSTMENTS

1. Seat Cushion Adjustment
   Move the horizontal control to move the seat forward or rearward and to tilt, raise or lower the seat.
2. Seatback Adjustment
   Move the vertical control to recline or raise the seatback.
3. Lumbar Adjustment
   Move the rear control to adjust the lumbar support.

SET MEMORY POSITIONS

1. With the vehicle in Park, adjust the driver's seat and power outside mirrors to the desired positions.
2. Press and release the SET button on the driver's door. A beep will sound.
3. Immediately press and hold button 1 or 2 until two beeps sound. Use the button that matches the Driver Information Center welcome message indicating driver 1 or 2 (key fob 1 or 2).

To store a seat position for more clearance when exiting the vehicle, repeat these steps using the Exit button instead of button 1 or 2.

RECALL POSITIONS

• Press and hold button 1 or 2 or Exit until the set position is reached.
  The memory/exit positions can be programmed to be recalled automatically when the ignition is turned on/off (for exit recall, the driver's door must be opened).
• To set the automatic recall options, go to Settings > Vehicle > Seating Position > Set Entry Memory and Set Exit Memory.

See Seats and Restraints in your Owner's Manual.

FRONT SEAT STORAGE

The bench seat has a foldable center seatback and may have a center storage compartment .

• Fold down the center seatback to access the storage compartment and cupholders. Press the latch and lift to open the storage compartment.
  The bucket seats have a center console with a storage compartment.
• Press the latch and lift to open the storage compartment.

See Seats and Restraints in your Owner's Manual.

REAR SEATS

REAR SEAT STORAGE
Seatback storage is an ideal location for charge cords, tablets, flashlights or rain gear.

• Pull the tab (A) to access the storage compartment in the outboard seatbacks.
• Lift up either side of the 60/40-split rear seat to access the storage areas under the seat.
  See Storage in your Owner's Manual.

REAR SEAT REMINDER
A Rear Seat Reminder message may display on the Driver Information Center when the vehicle is turned off. Check the rear seat before exiting the vehicle. The system does not actually detect people or items in the rear seat; instead, under certain conditions, it detects when a rear door has been opened, indicating that there may be something in the rear seat. See Seats and Restraints in your Owner's Manual.

POWER MIRRORS F /TRAILER-TOW MIRRORS

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.

TRAILER-TOW MIRRORS
The trailer-tow mirrors can be extended for better visibility when towing a trailer. The lower wide-field view mirror adjusts manually.

MANUAL EXTENSION

• To extend the manual mirror, grasp the mirror housing and pull back and rearward in one motion. The housing extends on a curved arc. Push in the housing to return the mirror to its original position.

POWER EXTENSION F (HD MODEL)

• Press the Power Extend button to extend or retract the power mirror.
  Note: Reset the power mirrors if they are adjusted manually by using the power controls to fold/ unfold or extend/retract the mirrors to their normal position.

See Keys, Doors and Windows in your Owner's Manual.

Optional equipment

CLIMATE CONTROLS/VEHICLE CONTROLS

Dual automatic climate controls

ELECTRIC PARKING BRAKE

• To apply the parking brake, press the Parking Brake button on the left side of the instrument panel.
• To release the parking brake, turn on the ignition, press the brake pedal, and then press the button.

See Driving and Operating in your Owner's Manual.

DRIVER INFORMATION CENTER

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 CONTROLS
Use the controls on the right side of the steering wheel to view the various menus.
Midlevel and uplevel DIC Controls shown

• Press the or button to move between the display zones.
• 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

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.

INFOTAINMENT SYSTEM

Refer to your Owner's Manual for important information about using the infotainment system while driving.

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 offers hands-free voice control. For assistance, contact Customer Assistance at 1-855-4-SUPPORT (1-855-478-7767) or visit my.gmc.com/learn.

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 your Infotainment System Manual.
Optional equipment

STORING FAVORITES
Radio stations from all bands (AM, FM or SiriusXM) can be stored in any order. The audio source options are on the left side of the 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.
4. Repeat the steps to store another favorite item.
   Note: To change the number of favorites displayed, go to Settings > System > Favorites

NATURAL VOICE RECOGNITION
Control the music source and make phone calls hands-free (after pairing your Bluetooth-enabled phone) using the natural voice recognition system.

1. Press the Press to Talk button on the steering wheel.
2. The radio will play a prompt followed by a beep.
3. After the beep, say what you want it to do using natural speech. Examples: "Call Dave" or "Tune 99.5 FM." Say "Help" for assistance.

APPS
In-vehicle apps — connecting to music, news, weather, travel information, sports, entertainment and more — are available for download to the infotainment system through the Apps icon on the Home page. Downloading and using the apps requires internet connectivity, and may require a data plan, accessed through the vehicle's 4G LTE Wi-Fi hotspot, if active, or a mobile device hotspot. Visit my.gmc.com/learn for more information.

APPLE CARPLAY
Apple CarPlay capability is available through a compatible smartphone using the Apple CarPlay icon on the Home page of the infotainment system. No app is required.

1. Connect your compatible phone by plugging the Lightning cable into a USB data port. Use your device's factory-provided cable. Aftermarket cables may not work.
2. The Apple CarPlay icon will illuminate. Touch the icon to have your apps displayed.

ANDROID AUTO
Android Auto capability is available through a compatible smartphone using the Android Auto icon on the Home page of the infotainment system.

1. Download the Android Auto app to your phone from the Google Play Store.
2. Connect your compatible phone by plugging the phone USB cable into a USB data port. Use your device's factory-provided USB cable. Aftermarket cables may not work.
3. The Android Auto icon will illuminate. Touch the icon to have your apps displayed.

SIRIUSXM® WITH 360L
SiriusXM with 360L provides subscribers an enhanced in-vehicle listening experience with unique satellite and streaming channels, on-demand content, personalized recommendations, and an interactive interface. For the full SiriusXM with 360L experience, OnStar Connected Access is required. Learn more about OnStar services at onstar.com.

BLUETOOTH® SYSTEM

Refer to 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 invehicle Bluetooth system. The pairing process is disabled when the vehicle is moving. Not all devices will support all functions. Visit my.gmc.com/learn for more information.

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 instructions.
4. When pairing is complete, the phone screen is displayed. Depending on the phone, your phone book may be downloaded automatically.

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, go to Settings > System > Phones and select the Information icon.

See your Infotainment System Manual.

4G LTE WI-FI® HOTSPOT

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 SSID 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/learn.

See your Infotainment System Manual.

WIRELESS CHARGING

The Wireless Charging system for mobile devices is located at the front of the center console. To check device compatibility, visit my.gmc.com/learn. 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 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.

VEHICLE CUSTOMIZATION

Some vehicle features can be customized using the Settings menus and the infotainment screen icons. The Settings menus include System, Apps, and Vehicle.

1. Select Settings on the Home page.
2. Select the desired menu tab.
3. Select the desired feature and setting.
4. Press BACK to exit each menu.

See Instruments and Controls in your Owner's Manual.

UNIVERSAL REMOTE SYSTEM

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 www.homelink.com for detailed videos and instructions on how to program the Universal Remote System. For additional assistance, call 1-800-355-3515.

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 Lighting
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 Lamp
With the vehicle in Park, Reverse, or Neutral, press to cycle through the cargo bed/hitch lamps and/or rear-facing mirror lamps. The button indicator illuminates when the cargo bed lamps are on.

INTELLIBEAM SYSTEM
The IntelliBeam system automatically turns the high-beam headlamps on/off according to surrounding traffic when the lamp control is in the AUTO position and the system is activated, indicated by a green on the instrument cluster. A blue appears when the high-beam headlamps are on. The system is turned off if the high/low-beam changer or the flash-to-pass feature is used.

• To turn the IntelliBeam system on or off, press the button on the end of the turn signal lever.

Note: IntelliBeam activates the high-beam headlamps only when driving over 25 mph.
See Lighting in your Owner's Manual.

DRIVER ASSISTANCE SYSTEMS

Safety or driver assistance features are no 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.

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 vehicle is detected in that side blind zone area or rapidly approaching that area. 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.

FORWARD COLLISION ALERT – The Vehicle Ahead Indicator is green when a vehicle is detected and is amber when following a vehicle 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 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.

ENHANCED AUTOMATIC EMERGENCY BRAKING – In detected potential imminent collision situations with vehicles directly ahead, the system can provide alerts and enhance driver braking or apply the brakes, if you have not already done so, to help reduce the severity or help avoid collisions at very low speeds.

• To set Enhanced Automatic Emergency Braking and Forward Collision Alert to Alert and Brake, Alert, or Off, go to Settings > Vehicle > Collision/Detection Systems > Forward Collision System

See Driving and Operating in your Owner's Manual.
Optional equipment

FRONT PEDESTRIAN BRAKING (LD Model) – During daytime driving, the system can detect pedestrians 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 brake the vehicle, 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 KEEP ASSIST WITH LANE DEPARTURE WARNING (LD Model) – 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. The Lane Keep Assist system does not continuously steer the vehicle; 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 center of the instrument panel.

LANE DEPARTURE WARNING (HD Model) – When crossing a detected lane marking without using a turn signal in that direction, the system flashes an amber indicator on the instrument cluster and the Safety Alert Seat pulses or beeps sound (if selected) on the side of the lane departure direction.

• To turn on or off, press the Lane Departure Warning button on the center of the instrument panel.

FRONT AND REAR PARK ASSIST – During low-speed parking maneuvers, the system provides "distance to closest object" information 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 5 beeps sound (if selected).

REAR CROSS TRAFFIC ALERT – When the vehicle is in Reverse, the system warns of 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 only Rear Cross Traffic Alert on or off, go to Settings > Vehicle > Collision/ Detection Systems > Rear Cross Traffic Alert.
• To turn Front and Rear Park Assist and Rear Cross Traffic Alert on or off, press the Park Assist button on the center of the instrument panel.

See Driving and Operating in your Owner's Manual.
Optional equipment

REAR VISION CAMERA/SURROUND VISION

REAR VISION CAMERA
When the vehicle is in Reverse below 8 mph, a view of the area behind the vehicle displays on the infotainment screen. Camera view buttons are at the bottom of the screen.
Rear Vision Camera Hitch Guidance screen

• Touch the Guidance Lines or Hitch Guid ance button to change the guidelines.
• Touch the Hitch View button for a zoomed-in view of the hitch area.

SURROUND VISION
Rear, front or side high-definition camera 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 below 8 mph. Camera view buttons are at the bottom of the screen.
Surround Vision Rear Camera View screen

• Touch the Guidance Lines or Hitch Guidance button to change the guidelines.
• Touch the Hitch View button for a zoomed-in view of the hitch area.
• Touch the Bed View button to view the cargo bed and the area behind the vehicle.
• To check the available camera views when in Drive above 8 mph, touch the Camera icon on the infotainment screen and select the desired view. Touch X to exit the view.

TRAILER CAMERA PROVISIONS
Multiple views to aid in trailering are shown on the infotainment screen using the vehicle cameras and up to two additional accessory cameras mounted on the rear or interior of the trailer.
Surround Vision Transparent Trailer View screen

• Touch the Camera icon on the infotainment screen or shift to Reverse to select a camera view using the camera view buttons at the bottom of the screen.

REAR CAMERA MIRROR

The rear camera mirror provides a wider, less obstructed field of view to assist when driving, changing lanes and checking traffic conditions.

1. On/Off
   Pull or push the lever at the bottom of the mirror to turn the video display on or off.
2. Selection Control
   Press and release the button to select the brightness, zoom, or tilt feature.
3. + / –
   Press and release either button to adjust the selected view.

See Keys, Doors and Windows in your Owner's Manual.

CRUISE CONTROL

SETTING CRUISE CONTROL

• Press the On/Off button. The Cruise Control symbol will illuminate in white on the instrument cluster.
• When traveling at the desired speed, rotate the thumbwheel down to set the speed. The symbol will illuminate in green on the instrument cluster.

ADJUSTING CRUISE CONTROL

+RES Resume/Accelerate
Rotate the thumbwheel up to resume a set speed. When active, rotate the thumbwheel up to increase speed 1 mph; rotate and hold to continue increasing speed.

–SET Set/Coast
When active, rotate the thumbwheel down to decrease speed 1 mph; rotate and hold to continue decreasing speed.

Cancel
Press the button, or press the brake pedal, to cancel Cruise Control without erasing the set speed from memory. The set speed is erased when Cruise Control or the vehicle ignition is turned off.

ADAPTIVE CRUISE CONTROL–ADVANCED F (LD MODEL)
The system enhances regular Cruise Control to maintain a following gap — the time between your vehicle and a vehicle detected directly ahead — by accelerating or braking automatically while you continue to steer.

• Press the Following Gap button to select a following gap setting of Far, Medium, or Near. This is also the Forward Collision Alert setting.
• Press and hold the Cancel button to switch between regular Cruise Control and Adaptive Cruise Control-Advanced.

See Driving and Operating in your Owner's Manual.

FOUR-WHEEL DRIVE

Use the four-wheel drive buttons on the left side of the instrument panel to shift into and out of four-wheel drive. The Driver Information Center displays the current status of the transfer case.

AUTO Auto Four-Wheel Drive High – Use 4 when traction conditions vary. Shift into this mode at any speed except when shifting from 4 .

2 Two-Wheel Drive High – Use for most streets and highways. Shift into this mode at any speed except when shifting from 4.

4 Four-Wheel Drive High – Use when extra 2 traction is needed or in most off-road driving. Shift into this mode at any speed except when shifting from 4.

4 Four-Wheel Drive Low – Use when driving off-road in deep sand, mud or snow, or 2 on steep hills. Shift into or out of this mode when the vehicle is stopped or moving less 4 than 3 mph with the transmission in Neutral. Shift the transmission into gear when the indicator light stops flashing.

N Neutral – Use to dolly or dinghy tow the vehicle behind an RV. Neutral is not available 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.

HILL DESCENT CONTROL

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 Hill Descent Control 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.

PARK GRADE HOLD ASSIST

Park Grade Hold Assist enhances hill hold by using braking effort at all four wheels to help keep the truck in place for an extended length of time.

See Driving and Operating in your Owner's Manual.

DRIVE MODES

The Drive Modes automatically adjust various vehicle control systems based on driving preferences, weather and road conditions. The modes are displayed on the Driver Information Center.

• Rotate the Drive Mode knob 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 brakes the vehicle when traversing various terrain or obstacles. Only available with single-speed transfer cases (LD Model) when in 4 . Refer to Driver Mode Control in your Owner's Manual.

See Driving and Operating in your Owner's Manual.

TIRE PRESSURE MONITOR

The Low Tire Pressure warning light on the instrument cluster illuminates when one 2 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 when the Low Tire Pressure warning light is on 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.

See Vehicle Care in your Owner's Manual.

TRAILERING

TRAILERING APP
The in-vehicle Trailering app on the infotainment screen includes:

• Hitching and setup with pre-departure checklists
• Maintenance reminders
• Trailer tire pressure monitoring
• Trailer light testing
• Customizing and saving trailer profiles
• Trailer Gain settings saved for each trailer profile
• Trailer theft detection (requires an active OnStar service plan)

Trailering App information also is available with the myGMC mobile app.

HITCH AREA LIGHTING

• Press the Cargo Lamp button on the left side of the instrument panel to turn the hitch lamp on/off.
  

TRAILERING INFORMATION LABEL
The Trailering information label, located by the driver's door latch, provides vehiclespecific weight information to help when loading the vehicle.

See Driving and Operating in your Owner's Manual.

INTEGRATED TRAILER BRAKE CONTROL (ITBC)

The ITBC system can be used to adjust the amount of power output, or Trailer Gain, available to the trailer brakes. The control panel is located on the center of the instrument panel. ITBC information is displayed on the Driver Information Center.

• Squeeze the control together (right side does not move) to manually apply the trailer brakes.
• Adjust the Trailer Gain by pressing the +/– adjustment buttons on the control panel.
• The trailer app will remember your Trailer Gain adjustments for each trailer profile.

GMC MULTIPRO TAILGATE OPERATION

The tailgate has 6 functional positions to improve loading, unloading and access to the cargo box.

1. Primary Gate
   Open the primary gate for access 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 gate 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 convenient 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 standingheight 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 tailgate consecutively.

OPEN THE LOAD STOP OR STEP

• Press the release bar (C).

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.

MYGMC MOBILE APP

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.

GMC OWNER CENTER

Get to know your vehicle inside and out with the GMC Owner Center. Check out personalized 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.

Documents / Resources

References

• Homelink
• Vehicle Support | GMC
• Welcome to OnStar | Safety and Evolving In-Vehicle Tech
• My GMC Account: Sign in | GMC

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download GMC SIERRA 1500 2020 / 2500HD 2020 / 3500HD 2020 / DENALI 1500 2020 Manual