seats GMC SIERRA 2023 Owners Manual

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Keys, Doors, and Windows . . . . . . . . . . . . . . . 8
Seats and Restraints . . . . . . . . . . . . . . . . . . . . 49
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Instruments and Controls . . . . . . . . . . . . . . 104
Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Infotainment System . . . . . . . . . . . . . . . . . . . 148
Climate Controls . . . . . . . . . . . . . . . . . . . . . . . 196
Driving and Operating . . . . . . . . . . . . . . . . . 203
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
Service and Maintenance . . . . . . . . . . . . . . . 384
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . 392
Customer Information . . . . . . . . . . . . . . . . . . 396
Reporting Safety Defects . . . . . . . . . . . . . . . 404
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408
Connected Services . . . . . . . . . . . . . . . . . . . . . 413
Index . . . . . . . . . . . . . . . . . . . . . . . . . . 416
Introduction
California Proposition 65 Warning
Litho in U.S.A.
Part No. 84883882 A First Printing©2022 General Motors LLC. All Rights Reserved.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
6 Introduction
1. Tow/Haul Mode (On Some Models). SeeDriver Mode Control 0243.
Automatic Transfer Case Control (If
Equipped). See Four-Wheel Drive 0234.
Driver Mode Control 0243 (If Equipped).
2. Air Vents 0201.
3. Head-Up Display (HUD) 0132 (If
Equipped).
4. Turn Signal Lever. See Turn and
Lane-Change Signals 0143.
Windshield Wiper/Washer 0106.
5. Instrument Cluster 0111.
6. Shift Lever. See Automatic Transmission
0 230.
Range Selection Mode. See Manual Mode
0 232.
7. Light Sensor. See Automatic Headlamp
System 0141.
8. Infotainment Controls. See Overview
0 149.
9. Climate Control Systems 0196 (If
Equipped).
Dual Automatic Climate Control System
0 197 (If Equipped).
10. Heated and Ventilated Front Seats 056
(If Equipped). 11.XPark Assist Switch (If Equipped). See
Assistance Systems for Parking or Backing
0 248.
5Power Release Tailgate (If
Equipped). See Tailgate026.
|Hazard Warning Flashers 0142.
gTraction Control/Electronic Stability
Control 0241.
-DC/AC Switch. See Power Outlets
0 107.
@Lane Departure Warning (LDW) 0262
(If Equipped).
5Hill Descent Control Switch (If
Equipped). See Hill Descent Control (HDC)
0 242.
jPower Assist Steps 033 (If
Equipped).
LExpress Window Down Button (If
Equipped). See Power Windows 044.
Tow/Haul Mode 0234 (On Some
Models).
Exhaust Brake (If Equipped). See Duramax
Diesel Supplement.
Power Take-Off (PTO) (If Equipped). See
Duramax Diesel Supplement. 12. Power Outlet (Alternating Current) (If
Equipped). See Power Outlets0107.
13. Power Outlets 0107.
14. USB Port 0158.
15. Wireless Charging 0109 (If Equipped).
16. Trailer Brake Control Panel (If Equipped). See“Integrated Trailer Brake Control
System” underTowing Equipment 0276.
17. ENGINE START/STOP. See Ignition
Positions (Key Access) 0221 or
Ignition Positions (Keyless Access) 0223.
18. Steering Wheel Controls 0151 (If
Equipped).
Driver Information Center (DIC) Controls.
See Driver Information Center (DIC) (Base
Level) 0128 or
Driver Information Center (DIC) (Midlevel
and Uplevel) 0130.
19. Horn 0106.
20. Hood Release. See Hood0303.
21. Steering Wheel Adjustment 0105 (Out
of View).
22. Cruise Control 0244.
Forward Collision Alert (FCA) System
0 257 (If Equipped).
Heated Steering Wheel 0105 (If
Equipped).

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
Keys, Doors, and Windows 9
{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
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.
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 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.
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 053.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
12 Keys, Doors, and Windows
With an active OnStar or connected service
plan, an OnStar Advisor may remotely
unlock the vehicle. SeeOnStar Overview
0 408.
If locked out of the vehicle, see Roadside
Assistance Program 0399.
If equipped with memory seats, RKE
transmitters 1 and 2 are linked to seating
positions of memory 1 or 2. See Memory
Seats 053.
Remote Keyless Entry (RKE)
System
See Radio Frequency Statement 0404.
If there is a decrease in the Remote Keyless
Entry (RKE) operating 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.
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 012.
/:Press and releaseQ, then immediately
press and hold
/until 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 022.
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
Qis
pressed again within three seconds. To view
available settings from the infotainment
screen, touch Settings > Vehicle > Remote
Lock, Unlock, Start.
Pressing
Qarms the alarm system. See
Vehicle Alarm System 034.
If equipped with remote mirror folding,
pressing and holding
Qfor one second will
fold the mirrors, if enabled. To view
available settings for this feature, touch the
Settings icon on the infotainment home
page. Select “Vehicle”to display the list of
available options and select “Comfort and
Convenience”.
K: Press once to unlock only the driver
door. If
Kis pressed again within
three seconds, all remaining doors unlock.
The 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.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
16 Keys, Doors, and Windows
tailgate unlock. The 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.
To view available settings for this feature,
touch the Settings icon on the infotainment
home page. Select“Vehicle”to display the
list of available options and select “Remote
Lock, Unlock, Start”.
Pressing
Kon the RKE transmitter disarms
the alarm system. See Vehicle Alarm System
0 34.
If equipped with remote mirror folding,
pressing and holding
Kfor one second will
unfold the mirrors, if enabled. To view
available settings for this feature, touch the
Settings icon on the infotainment home
page. Select “Vehicle”to display the list of
available options and select “Comfort and
Convenience”.
Press and hold
Kuntil the windows fully
open, if remote window operation is
enabled. To view available settings for this
feature, touch the Settings icon on the infotainment home page. Select
“Vehicle”to
display the list of available options and
select “Remote Lock, Unlock, Start”.
x:Press twice quickly to release the
tailgate, if equipped.
7: Press and release to initiate vehicle
locator. The turn signal lamps flash and the
horn sounds three times.
Press and hold
7for more than
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
7is 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. 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. To view
available settings for this feature, touch the
Settings icon on the infotainment home
page. Select
“Vehicle”to display the list of
available options and select “Remote Lock,
Unlock, Start”.
If equipped with memory seats, RKE
transmitters 1 and 2 are linked to seating
positions of memory 1 or 2. See Memory
Seats 053.
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.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
18 Keys, Doors, and Windows
Temporary Disable of Passive Locking
Temporarily disable passive locking by
pressing and holding
Kon the 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
Qon 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 times after all doors are
closed. To view available settings for this
feature, touch the Settings icon on the
infotainment home page. Select “Vehicle”to
display the list of available options and
select “Remote Lock, Unlock, Start”.
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 view available
settings for this feature, touch the Settings
icon on the infotainment home page. Select “Vehicle”
to display the list of available
options and select “Remote Lock, Unlock,
Start”.
Key Access
To access a vehicle with a dead transmitter
battery, see Door Locks023.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 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
Keys, Doors, and Windows 19
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
KorQon
the transmitter.
To program additional transmitters,
repeat Steps 4–6.
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 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.
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.
Transmitter Pocket without Bucket Seats
(Lower Compartment)

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
20 Keys, Doors, and Windows
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
Kor
Qon the transmitter.
To program additional transmitters,
repeat Steps 5–7.
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.
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.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
22 Keys, Doors, and Windows
2. Insert a flat, thin object in the center ofthe transmitter to separate and remove
the back cover.
3. Lift the battery with a flat object.
4. Remove the battery.
5. Insert the new battery, positive sidetoward the back cover. Replace with a
CR2032 or equivalent battery.
6. Ensure that the silicone mat is correctly positioned with no gaps or wrinkles.
7. Set transmitter button side down on a hard surface and press the other half
straight down to force the halves
together.
8. 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 056. To
view available settings for this feature,
touch the Settings icon on the infotainment
home page. Select “Vehicle”to display the
list of available options and select “Comfort
and Convenience”.
If equipped, the automatic heated steering
wheel may also come on. See Heated
Steering Wheel 0105.
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).
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 012.
Starting the Engine Using Remote Start
1. Press and release
Q.
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.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
38 Keys, Doors, and Windows
If a popping noise from the mirror is heard,
this sound is normal as the manual detents
are aligning after a manual extend/retract
operation has occurred.
Auxiliary Cargo Mirror Lamps
If equipped, cargo mirror lamps face
rearward to provide more light on the sides
of the vehicle, if needed. SeeExterior Cargo
Lamps 0144.
Advanced Trailering Vision System Side
Cameras
If equipped, the Advanced Trailering Vision
System side cameras are on the bottom of
the outside mirrors. See “Surround Vision
(360 Degrees)” underAssistance Systems for
Parking or Backing 0248.Power Mirrors
To adjust each mirror:
1. Press
jor|to select the driver or
passenger side mirror. The indicator light
will illuminate.
2. Press the arrows on the control pad to move the mirror in the desired direction.
3. Adjust each outside mirror so that a little of the vehicle and the area behind it can
be seen.
4. Press
jor|again to deselect the
mirror. Turn Signal Indicator
If equipped, the mirror has turn signal
indicator lights, which flash in the direction
of the turn or lane change.
Task Lighting
If equipped, task lighting projects light from
the outside mirrors to the sides of the
vehicle. See
Task Lighting 0144.
Puddle Lamps
If equipped, puddle lamps project light from
the bottom of the mirror to the area of
ground below the driver and passenger
doors. See Entry Lighting 0146 and
Exit Lighting 0146.
Memory Mirrors
The vehicle may have memory mirrors. See
Memory Seats 053.
Lane Change Alert (LCA)
The vehicle may have LCA. See Lane Change
Alert (LCA) 0261.