GMC Sierra 2500hd 2020, Sierra 3500hd 2020 Owner's Manual

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

Contents

Introduction .. . .. . . . . . . . . . . . . . . . . . 2

Keys, Doors, and Windows . . . . . . 9

Seats and Restraints . . . . . . . . . . . 52

Storage .. . . . . . . . . . . . . . . . . . . . . . 112

Instruments and Controls . . . . . . 117

Lighting .. . . . . . . . . . . . . . . . . . . . . . 165

Infotainment System . . . . . . . . . . 176

Climate Controls . . . . . . . . . . . . . . 177

Driving and Operating . . . . . . . . . 185

Vehicle Care . . . . . . . . . . . . . . . . . . 327

Service and Maintenance . . . . . 439

Technical Data . . . . . . . . . . . . . . . . 457

Customer Information . . . . . . . . . 462

Reporting Safety Defects . . . . . . 472

OnStar . . . . . . . . . . . . . . . . . . . . . . . . 476

Connected Services . . . . . . . . . . . 484

Index . . . . . . . . . . . . . . . . . . . . 487

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

2 Introduction

Introduction

The names, logos, emblems, slogans, vehicle model names, and vehicle body designs appearing in this manual including, but not limited to, GM, the GM logo, GMC, the GMC Truck Emblem, SIERRA, and DENALI are trademarks and/or service marks of General Motors LLC, its subsidiaries, affiliates, or licensors.

For vehicles first sold in Canada, substitute the name “General Motors of Canada Company” for GMC Division wherever it appears in this manual.

This manual describes features that may or may not be on the vehicle because of optional equipment that was not purchased on the vehicle, model variants, country specifications, features/applications that may not be available in your region, or changes subsequent to the printing of this owner’s manual.

If the vehicle has the Duramax diesel engine, see the Duramax diesel supplement for additional and specific information on this engine.

Refer to the purchase documentation relating to your specific vehicle to confirm the features.

Keep this manual in the vehicle for quick reference.

Canadian Vehicle Owners

A French language manual can be obtained from your dealer, at www.helminc.com, or from:

Propriétaires Canadiens

On peut obtenir un exemplaire de ce guide en français auprès du concessionnaire ou à l'adresse suivante:

Helm, Incorporated Attention: Customer Service 47911 Halyard Drive Plymouth, MI 48170 USA

Using this Manual

To quickly locate information about the vehicle, use the Index in the back of the manual. It is an alphabetical list of what is in the manual and the page number where it can be found.

Litho in U.S.A. Part No. 84186890 B Second Printing

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

Danger, Warning, and Caution

Warning messages found on vehicle labels and in this manual describe hazards and what to do to avoid or reduce them.

Danger

{

Danger indicates a hazard with a high level of risk which will result in serious injury or death.

Warning

{

Warning indicates a hazard that could result in injury or death.

A circle with a slash through it is a safety symbol which means “Do not,” “Do not do this,” or “Do not let this happen.”

Symbols

The vehicle has components and labels that use symbols instead of text. Symbols are shown along with the text describing the operation or information relating to a specific component, control, message, gauge, or indicator.

M : Shown when the owner’s

manual has additional instructions

Caution

Caution indicates a hazard that could result in property or vehicle damage.

or information.

* : Shown when the service

manual has additional instructions or information.

0 : Shown when there is more

information on another page — “see page.”

Introduction 3

Vehicle Symbol Chart

Here are some additional symbols that may be found on the vehicle and what they mean. See the features in this manual for information.

u : Air Conditioning System G : Air Conditioning Refrigerant Oil 9 : Airbag Readiness Light

! : Antilock Brake System (ABS) $ : Brake System Warning Light

9 : Dispose of Used Components

Properly

P : Do Not Apply High Pressure

Water

B : Engine Coolant Temperature _ : Flame/Fire Prohibited H : Flammable [ : Forward Collision Alert R : Fuse Block Cover Lock

Location

+ : Fuses j : ISOFIX/LATCH System Child

Restraints

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

4 Introduction

Q : Keep Fuse Block Covers

Properly Installed

| : Lane Change Alert @ : Lane Departure Warning A : Lane Keep Assist

* : Malfunction Indicator Lamp : : Oil Pressure

X : Park Assist

~ : Pedestrian Ahead Indicator

O : Power

7 : Rear Cross Traffic Alert

I : Registered Technician

/ : Remote Vehicle Start

> : Seat Belt Reminders

I : Side Blind Zone Alert

h : Stop/Start

7 : Tire Pressure Monitor

d : Traction Control/StabiliTrak/

Electronic Stability Control (ESC)

a : Under Pressure V : Vehicle Ahead Indicator

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

Instrument Panel Overview

Introduction 5

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

6 Introduction

1. Tow/Haul Mode (On Some Models). See Driver Mode Control 0 238.

Automatic Transfer Case Control (If Equipped). See

Four-Wheel Drive 0 227.

Driver Mode Control 0 238 (If

Equipped).

2. Air Vents 0 182.

3. Head-Up Display (HUD) 0 152 (If Equipped).

4. Turn Signal Lever. See Turn

and Lane-Change Signals 0 170.

Windshield Wiper/Washer

0 119.

5. Instrument Cluster 0 126.

6. Shift Lever. See Automatic Transmission 0 221.

Range Selection Mode. See Manual Mode 0 224.

7. Light Sensor. See Automatic Headlamp System 0 168.

8. Infotainment 0 176.

9. Climate Control Systems 0 177 (If Equipped).

Dual Automatic Climate Control System 0 179 (If Equipped).

10. Heated and Ventilated Front Seats 0 60 (If Equipped).

A Lane Keep Assist (LKA)

11. (1500 Series) 0 278 (If Equipped).

X Park Assist Switch (If

Equipped). See Assistance Systems for Parking or Backing 0 257.

h Auto Stop Disable Switch

(If Equipped). See Stop/Start System 0 213.

5 Power Release Tailgate

(If Equipped). See Tailgate 0 29.

| Hazard Warning Flashers

0 169.

g Traction Control/Electronic

Stability Control 0 235.

A DC/AC Switch. See Power

Outlets 0 121.

@ Lane Departure Warning

(LDW) (2500/3500 Series) 0 276 (If Equipped).

5 Hill Descent Control Switch

(If Equipped). See Hill Descent Control (HDC) 0 237.

j Power Assist Steps 0 34 (If

Equipped).

L Express Window Down

Button (If Equipped). See

Power Windows 0 47.

Tow/Haul Mode 0 227 (On

Some Models).

12. Power Outlet (Alternating Current) (If Equipped). See Power Outlets 0 121.

13. Power Outlets 0 121.

14. USB Port. See the infotainment manual.

15. Wireless Charging 0 122 (If Equipped).

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

16. Trailer Brake Control Panel (If Equipped). See “Integrated Trailer Brake Control System” under Towing Equipment 0 296.

17. ENGINE START/STOP. See

Ignition Positions (Keyless Access) 0 208 or Ignition Positions (Key Access)

0 210.

18. Steering Wheel Controls (If Equipped). See the infotainment manual.

Driver Information Center (DIC) Controls. See Driver

Information Center (DIC) (Base Level) 0 147 or Driver Information Center (DIC) (Midlevel and Uplevel) 0 148.

19. Horn 0 119.

20. Hood Release. See Hood 0 330.

21. Steering Wheel Adjustment 0 118 (Out of View).

Introduction 7

22. Cruise Control 0 243.

Adaptive Cruise Control (1500 Series) 0 245 (If Equipped).

Forward Collision Alert (FCA) System 0 268 (If Equipped).

Heated Steering Wheel 0 119

(If Equipped).

23. Data Link Connector (DLC) (Out of View). See Malfunction

Indicator Lamp (Check Engine Light) 0 137.

24. Electric Parking Brake 0 233.

25. Fog Lamps 0 170 (If Equipped).

Instrument Panel Illumination Control 0 172.

Exterior Cargo Lamps 0 171.

Exterior Lamp Controls 0 165.

Task Lighting 0 171 (If

Equipped).

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

8 Introduction

2 NOTES

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

Keys, Doors, and Windows

Steering Column Lock . . . . . . . . . 37

Immobilizer . . . . . . . . . . . . . . . . . . . . 37

Immobilizer Operation . . . . . . . . . 37

Exterior Mirrors

Keys and Locks

Keys (Key Access) . . . . . . . . . . . . . . 9

Keys (Keyless Access) . . . . . . . . 12

Remote Keyless Entry (RKE)

System . . . . . . . . . . . . . . . . . . . . . . . 13

Remote Keyless Entry (RKE)

System Operation (Key

Access) . . . . . . . . . . . . . . . . . . . . . . 13

Remote Keyless Entry (RKE)

System Operation (Keyless

Access) . . . . . . . . . . . . . . . . . . . . . . 16

Remote Vehicle Start . . . . . . . . . . 25

Door Locks . . . . . . . . . . . . . . . . . . . . 26

Power Door Locks . . . . . . . . . . . . . 27

Delayed Locking . . . . . . . . . . . . . . . 27

Automatic Door Locks . . . . . . . . . 27

Lockout Protection . . . . . . . . . . . . . 28

Safety Locks . . . . . . . . . . . . . . . . . . . 28

Doors

Tailgate . . . . . . . . . . . . . . . . . . . . . . . . 29

Power Assist Steps . . . . . . . . . . . . 34

Vehicle Security

Vehicle Security . . . . . . . . . . . . . . . . 36

Vehicle Alarm System . . . . . . . . . 36

Convex Mirrors . . . . . . . . . . . . . . . . 39

Manual Mirrors . . . . . . . . . . . . . . . . . 39

Trailer-Tow Mirrors . . . . . . . . . . . . . 40

Power Mirrors . . . . . . . . . . . . . . . . . . 41

Folding Mirrors . . . . . . . . . . . . . . . . . 42

Heated Mirrors . . . . . . . . . . . . . . . . . 43

Automatic Dimming Mirror . . . . . 43

Blind Spot Mirrors . . . . . . . . . . . . . . 43

Reverse Tilt Mirrors . . . . . . . . . . . . 44

Interior Mirrors

Interior Rearview Mirrors . . . . . . . 44

Manual Rearview Mirror . . . . . . . . 44

Automatic Dimming Rearview

Mirror . . . . . . . . . . . . . . . . . . . . . . . . . 44

Rear Camera Mirror . . . . . . . . . . . . 45

Windows

Windows . . . . . . . . . . . . . . . . . . . . . . . 47

Manual Windows . . . . . . . . . . . . . . 47

Power Windows . . . . . . . . . . . . . . . 47

Rear Windows . . . . . . . . . . . . . . . . . 49

Sun Visors . . . . . . . . . . . . . . . . . . . . . 50

Roof

Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 50

Keys, Doors, and Windows 9

Keys and Locks

Keys (Key Access)

Warning

{

Leaving children in a vehicle with the ignition key is dangerous and children or others could be seriously injured or killed. They could operate the power windows or other controls or make the vehicle move. The windows will function with the keys in the ignition, and children or others could be caught in the path of a closing window. Do not leave children in a vehicle with the ignition key.

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10 Keys, Doors, and Windows

Warning (Continued)

impacted, and airbags may not deploy. To reduce the risk of unintentional rotation of the ignition key, do not change the way the ignition key and Remote Keyless Entry (RKE) transmitter, if equipped, are connected to the provided key rings.

reduce the risk of unintentionally moving the key out of the RUN position. Do not add any additional items to the ring attached to the ignition key. Attach additional items only to the second ring, and limit added items to a few essential keys or small, light items no larger than an RKE transmitter.

Warning

{

If the key is unintentionally rotated while the vehicle is running, the ignition could be moved out of the RUN position. This could be caused by heavy items hanging from the key ring, or by large or long items attached to the key ring that could be contacted by the driver or steering wheel. If the ignition moves out of the RUN position, the engine will shut off, braking and steering power assist may be

(Continued)

The ignition key and key rings, and RKE transmitter, if equipped, are designed to work together as a system to reduce the risk of unintentionally moving the key out of the RUN position. The ignition key has a small hole to allow attachment of the provided key ring. It is important that any replacement ignition keys have a small hole. See your dealer if a replacement key is required.

The combination and size of the rings that came with your keys were specifically selected for your vehicle. The rings are connected to the key like two links of a chain to

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

Interference from radio-frequency identification (RFID) tags may prevent the key from starting the vehicle. Keep RFID tags away from the key when starting the vehicle.

The key is used for the ignition, all door locks, and the glove box.

If equipped with memory seats, keys 1 and 2 are linked to seating positions of memory 1 or 2. See Memory Seats 0 58.

Programming Keys

Follow these procedures to program up to eight keys to the vehicle.

Programming with Two Recognized Keys

To program a new key:

1. Insert the original, already programmed key in the ignition and turn the ignition on.

2. Turn the ignition off, and remove the key.

3. Quickly, within five seconds, insert the second original already programmed key in the ignition and turn the ignition on.

4. Turn the ignition off, and remove the key.

5. Insert the key to be programmed and turn the ignition on within five seconds.

6. After a few seconds, the security light will turn off once the key has been programmed.

7. Repeat Steps 1–5 if additional keys are to be programmed.

If a key is lost or damaged, see your dealer to have a new key made.

Keys, Doors, and Windows 11

Programming without Recognized Keys

Program a new key to the vehicle when a recognized key is not available. Canadian regulations require that owners see their dealer.

If two currently recognized keys are not available, follow this procedure to program the first key.

This procedure will take approximately 30 minutes to complete for the first key. The vehicle must be off and all of the keys you wish to program must be with you.

1. Insert the new vehicle key into the ignition.

2. Turn the ignition on. The security light will come on.

3. Wait 10 minutes until the security light turns off.

4. Turn the ignition off.

5. Repeat Steps 2–4 two more times. After the third time, turn the ignition on; the key is

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12 Keys, Doors, and Windows

learned and all previously known keys will no longer work with the vehicle.

6. To learn a second key, turn the ignition off, insert the second key to be learned, and turn the ignition on.

After two keys are learned, the remaining keys can be learned by following the procedure in “Programming with Two Recognized Keys.”

The key has a bar-coded key tag that the dealer or qualified locksmith can use to make new keys. Store this information in a safe place, not in the vehicle.

See your dealer if a replacement key or additional key is needed.

If it becomes difficult to turn a key, inspect the key blade for debris. Periodically clean with a brush or pick.

If locked out of the vehicle, see

Roadside Assistance Program

0 466.

With an active OnStar or connected service plan, an OnStar Advisor may remotely unlock the vehicle. See OnStar Overview 0 476.

Keys (Keyless Access)

Warning

{

Leaving children in a vehicle with an ignition key or Remote Keyless Entry (RKE) transmitter is dangerous and children or others could be seriously injured or killed. They could operate the power window or other controls or make the vehicle move. The windows will function with the key in the ignition or with the RKE transmitter in the vehicle, and children or others could be caught in the path of a closing window. Do not leave children in a vehicle with the ignition key or an RKE transmitter.

If the vehicle has the Keyless Access system, the transmitter has a button on the side of the transmitter used to remove the key.

This key is used for the driver door and glove box.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

If equipped with memory seats, RKE transmitters 1 and 2 are linked to seating positions of memory 1 or 2. See Memory Seats 0 58.

Remote Keyless Entry (RKE) System

See Radio Frequency Statement 0 472.

If there is a decrease in the Remote Keyless Entry (RKE) operating

Press the button to remove the key. Never pull the key out without pressing the button.

See your dealer if a replacement key or additional key is needed.

If it becomes difficult to turn a key, inspect the key blade for debris. Periodically clean with a brush or pick.

With an active OnStar or connected service plan, an OnStar Advisor may remotely unlock the vehicle. See OnStar Overview 0 476.

If locked out of the vehicle, see

Roadside Assistance Program

0 466.

range:

Check the distance. The transmitter may be too far from the vehicle.

Check the location. Other vehicles or objects may be blocking the signal.

Check the transmitter's battery. See “Battery Replacement” later in this section.

If the transmitter is still not working correctly, see your dealer or a qualified technician for service.

Keys, Doors, and Windows 13

Remote Keyless Entry (RKE) System Operation (Key Access)

The RKE transmitter functions may work up to 60 m (197 ft) away from the vehicle.

Other conditions can affect the performance of the transmitter. See

Remote Keyless Entry (RKE) System 0 13.

/ : Press and release Q, then

immediately press and hold the turn signal lamps flash or for at

/ until

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

14 Keys, Doors, and Windows

least four seconds. The engine may be started from outside the vehicle using the RKE transmitter. See Remote Vehicle Start 0 25.

Q : Press to lock all doors.

If enabled, the turn signal lamps may flash and/or the horn may sound on the second press to indicate locking has occurred.

If enabled, the horn chirps when is pressed again within three seconds. See Vehicle Personalization 0 156.

Pressing See Vehicle Alarm System 0 36.

If equipped with remote mirror folding, pressing and holding one second will fold the mirrors, if enabled. See Vehicle Personalization 0 156.

Q arms the alarm system.

Q for

K : Press once to unlock only the

driver door. If within three seconds, all remaining doors unlock. The interior lamps

K is pressed again

may come on and stay on for 20 seconds or until the ignition is turned on.

If enabled, the turn signal lamps flash twice to indicate unlocking has occurred. If enabled, the exterior lamps may turn on. See Vehicle Personalization 0 156.

Pressing disarms the alarm system. See Vehicle Alarm System 0 36.

If equipped with remote mirror folding, pressing and holding one second will unfold the mirrors, if enabled. See Vehicle Personalization 0 156.

Press and hold the windows, if enabled. See Vehicle Personalization 0 156.

K on the RKE transmitter

K to remotely open

x : Press twice quickly to release

the tailgate, if equipped.

7 : Press and release to initiate the

vehicle locator. The turn signal lamps flash and the horn sounds three times.

K for

Press and hold three seconds to activate the panic alarm. The turn signal lamps flash and the horn sounds repeatedly for 30 seconds. The alarm turns off

when the ignition is turned on or is pressed again. The ignition must be off for the panic alarm to work.

7 for more than

Programming Transmitters to the Vehicle

Only RKE transmitters programmed to this vehicle will work. If a transmitter is lost or stolen, a replacement can be purchased and programmed through your dealer. Each vehicle can have up to eight transmitters programmed to it. See your dealer for transmitter programming.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

Battery Replacement

Warning

{

Never allow children to play with the RKE transmitter. The transmitter contains a small battery, which can be a choking hazard. If swallowed, internal burns can occur, resulting in severe injury or death. Seek medical attention immediately if a battery is swallowed.

Warning

{

To avoid personal injury, do not touch metal surfaces on the RKE transmitter when it has been exposed to extreme heat. These surfaces can be hot to the touch at temperatures above 59 °C (138 °F).

Caution

When replacing the battery, do not touch any of the circuitry on the transmitter. Static from your body could damage the transmitter.

Caution

Always replace the battery with the correct type. Replacing the battery with an incorrect type could potentially create a risk of battery explosion. Dispose of used batteries according to instructions and local laws. Do not attempt to burn, crush, or cut the used battery, and avoid exposing the battery to environments with extremely low air pressures or high temperatures.

Keys, Doors, and Windows 15

Replace the battery in the transmitter soon if the REPLACE BATTERY IN REMOTE KEY displays in the Driver Information Center (DIC).

To replace the battery:

1. Separate and remove the back cover of the transmitter with a flat, thin object, such as a coin.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

16 Keys, Doors, and Windows

Remote Keyless Entry (RKE) System Operation (Keyless Access)

The Keyless Access system allows for vehicle entry when the transmitter is within 1 m (3 ft). See “Keyless Access Operation” later in this section.

The RKE transmitter functions may work up to 60 m (197 ft) away from

2. Press and slide the battery down toward the pocket of the transmitter in the direction of the key ring. Do not use a metal object

3. Remove the battery.

4. Insert the new battery, positive side facing up. Replace with a CR2032 or equivalent battery.

5. Push together the transmitter back cover top side first, and then the bottom toward the key ring.

the vehicle.

Other conditions can affect the performance of the transmitter. See

Remote Keyless Entry (RKE) System 0 13.

The key that is part of the RKE transmitter can be used for all locks.

Remove the key by pressing the button on the side of the RKE transmitter near the bottom and pull the key out. Never pull the key out without pressing the button.

See your dealer if a new transmitter is needed.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

/ : Press and release Q, then

immediately press and hold the turn signal lamps flash or for at least four seconds. The engine may be started from outside the vehicle using the RKE transmitter. See Remote Vehicle Start 0 25.

/ until

Q : Press to lock all doors and the

tailgate, if equipped.

If enabled, the turn signal lamps flash and/or the horn may sound on the second press to indicate locking has occurred. If enabled, the horn

chirps when within three seconds. See Vehicle Personalization 0 156.

If the driver door is open when pressed, all doors will lock and then the driver door will immediately unlock, if enabled. See Vehicle Personalization 0 156.

If the passenger door is open when

Q is pressed again

Q is

Q is pressed, all doors lock.

Pressing See Vehicle Alarm System 0 36.

If equipped with remote mirror folding, pressing and holding one second will fold the mirrors, if enabled. See Vehicle Personalization 0 156.

Q arms the alarm system.

Q for

K : Press once to unlock only the

driver door. If within three seconds, all remaining doors and the tailgate unlock. The

K is pressed again

Keys, Doors, and Windows 17

interior lamps may come on and stay on for 20 seconds or until the ignition is turned on.

If enabled, the turn signal lamps flash twice to indicate unlocking has occurred. If enabled, the exterior lamps may turn on. See Vehicle Personalization 0 156.

Pressing disarms the alarm system. See Vehicle Alarm System 0 36.

If equipped with remote mirror folding, pressing and holding one second will unfold the mirrors, if enabled. See Vehicle Personalization 0 156.

Press and hold fully open, if remote window operation is enabled. See Vehicle Personalization 0 156.

K on the RKE transmitter

K for

K until the windows

x : Press twice quickly to release

the tailgate, if equipped.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

18 Keys, Doors, and Windows

7 : Press and release to initiate

vehicle locator. The turn signal lamps flash and the horn sounds three times.

Press and hold three seconds to activate the panic alarm. The turn signal lamps flash and the horn sounds repeatedly for 30 seconds. The alarm turns off

when the ignition is turned on or is pressed again. The ignition must be off for the panic alarm to work.

Keyless Access Operation

The Keyless Access system allows for doors and the tailgate to be accessed without pressing the RKE transmitter button. The RKE transmitter must be within 1 m (3 ft) of the tailgate or door being opened. If the vehicle has this feature, there will be a button on the outside door handles.

7 for more than

Keyless Access can be programmed to unlock all doors on the first lock/unlock press from the driver door. Keyless Unlocking can also be turned off. See Vehicle Personalization 0 156.

If equipped with memory seats, RKE transmitters 1 and 2 are linked to seating positions of memory 1 or 2. See Memory Seats 0 58.

Keyless Unlocking/Locking from the Driver Door

When the doors are locked and the RKE transmitter is within 1 m (3 ft) of the door handle, pressing the lock/unlock button on the driver door handle will unlock the driver door. If the lock/unlock button is pressed again within five seconds, all passenger doors and the tailgate will unlock.

Driver Side Shown, Passenger

Side Similar

Pressing the lock/unlock button will cause all doors to lock if any of the following occur:

It has been more than five seconds since the first lock/ unlock button press.

Two lock/unlock button presses were used to unlock all doors.

Any vehicle door has been opened and all doors are now closed.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

Keyless Unlocking/Locking from the Passenger Doors

When the doors are locked and the RKE transmitter is within 1 m (3 ft) of the door handle, pressing the lock/unlock button on a passenger door handle will unlock all doors. Pressing the lock/unlock button will cause all doors to lock if any of the following occur:

The lock/unlock button was used to unlock all doors.

Any vehicle door has been opened and all doors are now closed.

Disable/Enable Keyless Unlocking of Exterior Door Handles and Tailgate

If equipped, keyless unlocking of the exterior door handles and tailgate can be disabled and enabled.

Disabling Keyless Unlocking:

With the vehicle off, press and hold

Q and K on the RKE

transmitter at the same time for approximately three seconds. The turn signal lamps will flash four

times quickly to indicate access is disabled. Using any exterior handle to unlock the doors or open the tailgate will cause the turn signal lamps to flash four times quickly, indicating access is disabled. If disabled, disarm the alarm system before starting the vehicle.

Enabling Keyless Unlocking:

With the vehicle off, press and hold

Q and K on the RKE

transmitter at the same time for approximately three seconds. The turn signal lamps will flash twice quickly to indicate access is enabled.

Passive Locking

This feature will lock the vehicle several seconds after all doors are closed, if the vehicle is off and at least one RKE transmitter has been removed from the interior, or none remain in the interior.

If other electronic devices interfere with the RKE transmitter signal, the vehicle may not detect the RKE transmitter inside the vehicle.

Keys, Doors, and Windows 19

If passive locking is enabled, the doors may lock with the RKE transmitter inside the vehicle. Do not leave the RKE transmitter in an unattended vehicle.

To customize the doors to automatically lock when exiting the vehicle, see “Remote Lock, Unlock, Start” under Vehicle Personalization 0 156.

Temporary Disable of Passive Locking

Temporarily disable passive locking by pressing and holding

interior door switch with a door open for at least four seconds, or until three chimes are heard. Passive locking will then remain disabled

until

Q on the interior door is

pressed, or until the vehicle is turned on.

Remote Left in Vehicle Alert

When the vehicle is turned off and an RKE transmitter is left in the vehicle, the horn will chirp three

K on the

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20 Keys, Doors, and Windows

times after all doors are closed. To turn on or off see Vehicle Personalization 0 156.

Remote No Longer in Vehicle Alert

If the vehicle is on with a door open and then all doors are closed, the vehicle will check for RKE transmitters inside. If an RKE transmitter is not detected, the Driver Information Center (DIC) will display NO REMOTE DETECTED and the horn will chirp three times. This occurs only once each time the vehicle is driven. To turn on or off see Vehicle Personalization 0 156.

Key Access

To access a vehicle with a dead transmitter battery, see Door Locks 0 26.

Programming Transmitters to the Vehicle

Only RKE transmitters programmed to the vehicle will work. If a transmitter is lost or stolen, a replacement can be purchased and programmed through your dealer. The vehicle can be reprogrammed

so that lost or stolen transmitters no longer work. Each vehicle can have up to eight transmitters matched to it.

Programming with Recognized Transmitters

A new transmitter can be programmed to the vehicle when there are two recognized transmitters.

To program, the vehicle must be off and all transmitters, both currently recognized and new, must be with you.

1. Remove the key from a recognized transmitter.

2. Place the two recognized transmitters in the cupholder or on the passenger seat.

3. Insert the vehicle key into the key lock cylinder on the driver door handle. Then turn the key counterclockwise, to the unlock position, five times within 10 seconds.

The DIC displays READY FOR REMOTE#3, 4, 5 ETC.

Transmitter Pocket without Bucket

Seats (Lower Compartment)

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

When all additional transmitters are programmed, press and hold ENGINE START/STOP for approximately 12 seconds to exit programming mode.

7. Return the key back into the transmitter.

Programming without Recognized Transmitters

If two currently recognized

Transmitter Pocket with Bucket

Seats

4. Place the new transmitter in the transmitter pocket/insert.

5. Press ENGINE START/STOP. When the transmitter is learned, the DIC display will show that it is ready to program the next transmitter.

6. Remove the transmitter from the transmitter pocket and

press

K or Q on the

transmitter.

To program additional transmitters, repeat Steps 4–6.

transmitters are not available, follow this procedure to program up to eight transmitters. This feature is not available in Canada. This procedure will take approximately 30 minutes to complete. The vehicle must be off and all transmitters to be programmed must be with you.

1. Remove the vehicle key from the transmitter.

2. Insert the vehicle key into the key lock cylinder on the driver door handle; then turn the key counterclockwise, to the unlock position, five times within 10 seconds.

Keys, Doors, and Windows 21

The DIC displays REMOTE LEARN PENDING, PLEASE WAIT.

3. Wait for 10 minutes until the DIC displays PRESS ENGINE START BUTTON TO LEARN, then press ENGINE START/STOP.

The DIC will again display REMOTE LEARN PENDING, PLEASE WAIT.

4. Repeat Step 3 two additional times. After the third time all previously known transmitters will no longer work with the vehicle. Remaining transmitters can be relearned during the next steps.

The DIC should now display READY FOR REMOTE # 1.

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22 Keys, Doors, and Windows

Transmitter Pocket without Bucket

Seats (Lower Compartment)

Transmitter Pocket with Bucket

Seats

5. Place the new transmitter in the transmitter pocket/insert.

6. Press ENGINE START/STOP. When the transmitter is learned, the DIC display will show that it is ready to program the next transmitter.

7. Remove the transmitter from the transmitter pocket/insert

and press transmitter.

To program additional transmitters, repeat Steps 5–7.

K or Q on the

When all additional transmitters are programmed, press and hold ENGINE START/STOP for approximately 12 seconds to exit programming mode.

8. Return the key back into the transmitter.

Starting the Vehicle with a Low Transmitter Battery

If the transmitter battery is weak or if there is interference with the signal, the DIC may display NO REMOTE DETECTED or NO REMOTE KEY WAS DETECTED PLACE KEY IN TRANSMITTER POCKET THEN START YOUR VEHICLE when starting the vehicle.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

To start the vehicle:

Transmitter Pocket without Bucket

Seats (Lower Compartment)

Transmitter Pocket with Bucket

Seats

1. Place the transmitter in the transmitter pocket/insert.

2. With the vehicle in P (Park) or N (Neutral) press the brake pedal and ENGINE START/STOP.

Replace the transmitter battery as soon as possible.

Keys, Doors, and Windows 23

Battery Replacement

Warning

{

Warning

{

To avoid personal injury, do not touch metal surfaces on the RKE transmitter when it has been exposed to extreme heat. These surfaces can be hot to the touch at temperatures above 59 °C (138 °F).

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24 Keys, Doors, and Windows

Caution

When replacing the battery, do not touch any of the circuitry on the transmitter. Static from your body could damage the transmitter.

Caution

Replace the battery in the transmitter soon if the DIC displays REPLACE BATTERY IN REMOTE KEY.

To replace the battery:

1. Press the button on the RKE transmitter to remove the key. Never pull the key out without pressing the button.

2. Insert a flat, thin object in the center of the transmitter to separate and remove the back cover.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

3. Lift the battery with a flat object.

4. Remove the battery.

5. Insert the new battery, positive side toward the back cover. Replace with a CR2032 or equivalent battery.

6. Push together the transmitter.

7. Insert the key back into the RKE transmitter.

Remote Vehicle Start

If equipped with the remote start feature, the climate control system will come on when the vehicle is started remotely, depending on the outside temperature.

The rear defog and heated and ventilated seats, if equipped, may also come on. See Heated and

Ventilated Front Seats 0 60 and Vehicle Personalization 0 156.

If equipped, the automatic heated steering wheel may also come on. See Heated Steering Wheel 0 119.

Laws in some communities may restrict the use of remote starters. Check local regulations for any requirements on remote starting of vehicles.

Do not use remote start if the vehicle is low on fuel. The vehicle may run out of fuel.

The vehicle cannot be remote started if:

The RKE transmitter is inside the vehicle or if the key is in the ignition.

The hood is not closed.

There is an emission control system malfunction and the lamp is on.

The ignition is in any mode other than off.

The hazard warning flashers are on.

Two remote starts or a remote start with an extension have been used.

The vehicle is not in P (Park).

Keys, Doors, and Windows 25

The engine will turn off during a remote vehicle start if:

The coolant temperature gets too high.

The oil pressure gets low.

The RKE transmitter range may be reduced while the vehicle is running.

Other conditions can affect the performance of the transmitter. See

Remote Keyless Entry (RKE) System 0 13.

Starting the Engine Using Remote Start

1. Press and release

2. Immediately press and hold until the turn signal lamps flash or for at least four seconds.

When the vehicle starts, the parking lamps will turn on. The doors will be locked and the climate control system may come on.

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26 Keys, Doors, and Windows

The engine will continue to run for 15 minutes. After 30 seconds, repeat Steps 1 and 2 for a 15-minute time extension.

Turn the ignition on to operate the vehicle.

Extending Engine Run Time

The engine run time can be extended by 15 minutes, for a total of 30 minutes, if during the first 15 minutes Steps 1 and 2 are repeated while the engine is still running. An extension can be requested 30 seconds after starting.

A maximum of two remote starts, or a single start with an extension, is allowed between ignition cycles.

The vehicle's ignition must be turned on and then back off to use remote start again.

Canceling a Remote Start

To cancel a remote start, do one of the following:

Press and hold parking lamps turn off.

/ until the

Turn on the hazard warning flashers.

Turn the ignition on and then off.

Door Locks

Warning

{

Unlocked doors can be dangerous.

Passengers, especially children, can easily open the doors and fall out of a moving vehicle. The doors can be unlocked and opened while the vehicle is moving. The chance of being thrown out of the vehicle in a crash is increased if the doors are not locked. So, all passengers should wear seat belts properly and the doors should be locked whenever the vehicle is driven.

(Continued)

Warning (Continued)

Young children who get into unlocked vehicles may be unable to get out. A child can be overcome by extreme heat and can suffer permanent injuries or even death from heat stroke. Always lock the vehicle whenever leaving it.

Outsiders can easily enter through an unlocked door when you slow down or stop the vehicle. Locking the doors can help prevent this from happening.

There are several ways to lock and unlock the vehicle.

From outside:

Use the Remote Keyless Entry (RKE) transmitter.

Use Keyless Access, if equipped.

Use the key in the driver door or the passenger door, if equipped.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

From inside, use the power door locks or the manual door locks. To lock the door with the manual door locks, push down on the manual lock knob.

From inside, pull the door handle once to unlock the door. Pull the handle again to open the door.

See Vehicle Alarm System 0 36.

Free-Turning Locks

The door key lock cylinder turns freely when either the wrong key is used, or the correct key is not fully inserted. The free-turning door lock feature prevents the lock from being forced open. To reset the lock, turn it to the vertical position with the correct key fully inserted. Remove the key and insert it again. If this does not reset the lock, turn the key halfway around in the cylinder and repeat the reset procedure.

Power Door Locks

If equipped with power door locks.

Q : Press to lock the doors. K : Press to unlock the doors.

Delayed Locking

If equipped, this feature delays the locking of the doors until five seconds after all doors are closed.

Delayed locking can only be turned on when the Open Door Anti-Lockout feature has been turned off.

Keys, Doors, and Windows 27

Q is pressed on the power

When door lock switch while the door is open, a chime will sound three times indicating delayed locking is active.

The doors will lock automatically five seconds after all doors are closed. If a door is reopened before that time, the five-second timer will reset when all doors are closed again.

Q on the door lock switch

Press again or press

transmitter to lock the doors immediately.

This feature can be programmed. See Vehicle Personalization 0 156.

Q on the RKE

Automatic Door Locks

If equipped, the doors will lock automatically when all doors are closed, the ignition is on, and the vehicle is shifted out of P (Park).

If a vehicle door is unlocked, and then opened and closed, the doors will lock either when your foot is

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28 Keys, Doors, and Windows

removed from the brake or the vehicle speed becomes faster than 13 km/h (8 mph).

To unlock the doors:

Press

K on the power door lock

switch.

Shift the transmission into P (Park).

Automatic door locking cannot be disabled. Automatic door unlocking can be programmed. See Vehicle Personalization 0 156.

Lockout Protection

If equipped, the ignition is on or in ACC/ACCESSORY and the power door lock switch is pressed with the driver door open, all the doors will lock and only the driver door will unlock.

If the vehicle is off and locking is requested while a door is open, when all doors are closed the vehicle will check to the Keyless Access function (if equipped). If an RKE transmitter is detected and the number of RKE transmitters inside

has not reduced, the driver door will unlock and the horn will chirp three times.

Lockout Protection can be manually overridden with the driver door open

by pressing and holding power door lock switch.

Open Door Anti-Lockout

If equipped, the Open Door Anti-Lockout is turned on and the vehicle is off, the driver door is open, and locking is requested, all the doors will lock and the driver door will unlock. The Open Door Anti-Lockout feature can be turned on or off. See Vehicle Personalization 0 156.

Safety Locks

The rear door safety locks prevent passengers from opening the rear doors from inside the vehicle.

Q on the

The safety lock is on the inside edge of the rear doors. To use the safety lock:

1. Move the lever down to the lock position.

2. Close the door.

3. Do the same for the other rear door.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-13337776) - 2020 - CRC - 8/27/19

To open a rear door when the safety lock is on:

1. Unlock the door by activating the inside handle, by pressing the power door unlock switch, or by using the Remote Keyless Entry (RKE) transmitter.

2. Open the door from the outside.

When the safety lock is enabled, adults and older children will not be able to open the rear door from the inside. Cancel the safety locks to enable the doors to open from the inside.

To cancel the safety lock:

1. Unlock the door and open it from the outside.

2. Move the lever up to unlock. Do the same for the other door.

Doors

Tailgate

Manual Tailgate

{

It is extremely dangerous to ride on the tailgate, even when the vehicle is operated at low speeds. People riding on the tailgate can easily lose their balance and fall in response to vehicle maneuvers. Falling from a moving vehicle may result in serious injuries or death. Do not allow people to ride on the tailgate. Be sure everyone in your vehicle is in a seat and using a seat belt properly.

Use the key to unlock the tailgate.

Open the tailgate by lifting up on its handle while pulling the tailgate down.

To shut the tailgate, firmly push it upward until it latches.

Warning

Keys, Doors, and Windows 29

After closing the tailgate, pull it back to be sure it is latched securely.

Some tailgates have an electric latch. If the battery is disconnected or has low voltage, the tailgate will not open. The tailgate will resume operation when the battery is reconnected or recharged.

Power Release Tailgate

Warning

{

Make sure there is no one in the way of the power tailgate as it is opening and closing, and keep hands away from the tailgate hinges when in use. You or others could be injured if caught in the path of the power tailgate or tailgate hinges.

Caution

To avoid damage to the tailgate, make sure the area behind the tailgate is clear before opening it.

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