2023 GMC SIERRA alarm

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
Driving and Operating 297
Theft Alert
A theft alert can be set if a trailer is
connected and the alert is enabled. When
the trailer is disconnected and the vehicle is
off, an alarm will sound.
Touch Theft Alert in Settings to view the
Theft Alert settings page. These alerts are
based on the Trailer Profile, so the settings
for each Trailer Profile must be turned on or
off. Touch a profile to view more
information or adjust the setting for that
profile.
This setting will be off by default for each
Trailer Profile, including the Guest Trailer
Profile.
A smartphone will receive a notification that
the trailer related to the selected Trailer
Profile is disconnected from the vehicle,
if the setting is on for the active Trailer
Profile, the vehicle has an OnStar or
connected service plan and the smartphone
number has been added to the account for
this notification.
If the setting is turned off for a given Trailer
Profile, the smartphone will not receive this
security notification even if the Trailer
Profile is active.
Tow/Haul Mode Reminder
This is a reminder to turn on the Tow/Haul
Mode when towing a trailer. SeeTow/Haul
Mode 0234.
Touch Tow/Haul Mode Reminder in Settings
to view the Tow/Haul Mode Reminder
settings page. These alerts are based on the
Trailer Profile, so the settings for each
Trailer Profile must be turned on or off.
Touch a profile to view more information or
to adjust the setting for that profile.
This setting will default to OFF for each
Trailer Profile, including the Guest Trailer
Profile.
If Tow/Haul Mode is off and this setting is
on for a Trailer Profile, each time the vehicle
is turned on a reminder will appear to turn
on Tow/Haul Mode when the Trailer Profile
is active.
If Tow/Haul Mode is on and this setting is
on for a Trailer Profile, the reminder will not
appear when the Trailer Profile is active.
Trailer Length Indicator
Touch Trailer Length Indicator to view the
Trailer Length Indicator settings page. If this
setting is ON a guideline is displayed in the side mirror camera view to indicate the rear
of the attached trailer. If this setting is OFF
the guideline will not be displayed.
This setting will default to OFF if the trailer
length indicator feature is not set up. See
"Towing Assistance" for details on the setup.
Conversions and Add-Ons
Add-On Electrical Equipment
{Warning
The Data Link Connector (DLC) is used for
vehicle service and Emission Inspection/
Maintenance testing. See
Malfunction
Indicator Lamp (Check Engine Light) 0120
. A device connected to the DLC —such
as an aftermarket fleet or driver-behavior
tracking device —may interfere with
vehicle systems. This could affect vehicle
operation and cause a crash. Such devices
may also access information stored in the
vehicle’s systems.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
OnStar 409
.Give OnStar Turn-by-Turn Navigation voice
commands.
.Obtain and customize the Wi-Fi hotspot
name or SSID and password, if equipped.
Press
Qto connect to an Advisor to:
.Verify account information or update
contact information.
.Get driving directions.
.Receive a Diagnostic check of the vehicle's
key operating systems.
.Receive Roadside Assistance.
.Manage Wi-Fi Settings, if equipped.
Press
>to get a priority connection to an
OnStar Advisor available 24/7 to:
.Get help for an emergency.
.Be a Good Samaritan or respond to an
AMBER Alert.
.Get assistance in severe weather or other
crisis situations and find evacuation
routes.
OnStar Services
Emergency
Emergency Services require an active safety
and security plan. With Automatic Crash
Response, built-in sensors can automatically
alert a specially trained OnStar Advisor who
is immediately connected in to the vehicle
to help.
Press
>for a priority connection to an
OnStar Advisor who can contact emergency
service providers, direct them to your exact
location, and relay important information.
With OnStar Crisis Assist, specially trained
Advisors are available 24 hours a day, 7 days
a week, to provide a central point of
contact, assistance, and information during a
crisis.
With Roadside Assistance, Advisors can
locate a nearby service provider to help with
a flat tire, a battery jump, or an empty
gas tank.
Security
If equipped, OnStar provides these services:
.With Stolen Vehicle Assistance, OnStar
Advisors can use GPS to pinpoint the
vehicle and help authorities quickly
recover it.
.With Remote Ignition Block, if equipped,
OnStar can block the vehicle from being
restarted.
.With Stolen Vehicle Slowdown,
if equipped, OnStar can work with law
enforcement to gradually slow the
vehicle down.
Theft Alarm Notification
If equipped, if the doors are locked and the
vehicle alarm sounds, a notification by text,
e-mail, or phone call will be sent. If the
vehicle is stolen, an OnStar Advisor can work
with authorities to recover the vehicle.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
416 Index
IndexA
Accessories and Modifications . . . . . . . . . . . 302
Accessory Power . . . . . . . . . . . . . . . . . . . . . . . . . 227
Add-On Electrical Equipment . . . . . . . . . . . . . 297
Adding a Snow Plow or SimilarEquipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
Additional OnStar Information . . . . . . . . . . . . . . . . . . . . 410
Adjustments Lumbar, Front Seats . . . . . . . . . . . . . . . . . . . . 53
Agreements Trademarks and License . . . . . . . . . . . . . . . 189
Air Cleaner/Filter, Engine . . . . . . . . . . . . . . . . . . 310
Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Filter Life System . . . . . . . . . . . . . . . . . . . . . . 309
Filter, Passenger Compartment . . . . . . . . 201
Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . 196
Airbag System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
How Does an Airbag Restrain? . . . . . . . . . . 69
Passenger Sensing System . . . . . . . . . . . . . . 70
What Makes an Airbag Inflate? . . . . . . . . . 68
What Will You See after an AirbagInflates? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
When Should an Airbag Inflate? . . . . . . . . 68
Where Are the Airbags? . . . . . . . . . . . . . . . . 67 Airbags
Adding Equipment to the Vehicle . . . . . . . 74
Passenger Status Indicator . . . . . . . . . . . . . . 119
Readiness Light . . . . . . . . . . . . . . . . . . . . . . . . . 119
Replacing System Parts after a
Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Servicing Airbag-Equipped Vehicles . . . . . . 73
Alarm Vehicle Security . . . . . . . . . . . . . . . . . . . . . . . . 34
Alert Lane Change . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Rear Cross Traffic . . . . . . . . . . . . . . . . . . . . . . 257
Side Blind Zone (SBZA) . . . . . . . . . . . . . . . . . 260
All-Season Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 338
All-Terrain Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 338
AM-FM Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . .154
Antenna Fixed Mast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Multi-band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Antilock Brake System (ABS) . . . . . . . . . . . . . 238 Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . 123
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 374
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379
Apple CarPlay and Android Auto . . . . . . . . . . 181
Assistance Program, Roadside . . . . . . . . . . . . 399
Assistance Systems
Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
Index 425
RestraintsWhere to Put . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Retained Accessory Power (RAP) . . . . . . . . . 227
Reverse Tilt Mirrors . . . . . . . . . . . . . . . . . . . . . . . 40
Roads Driving, Wet . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Roadside Assistance Program . . . . . . . . . . . . 399
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Rotation, Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . 349
Routing, Engine Drive Belt . . . . . . . . . . . . . . . 395
Running Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Running the Vehicle While Parked . . . . . . . 230
S
Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Safety Defects Reporting Canadian Government . . . . . . . . . . . . . . . . . 405
General Motors . . . . . . . . . . . . . . . . . . . . . . . . 405
U.S. Government . . . . . . . . . . . . . . . . . . . . . . . 404
Safety System Check . . . . . . . . . . . . . . . . . . . . . 64
Satellite Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Scheduling Appointments . . . . . . . . . . . . . . . . 401
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Extender . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
How to Wear Seat Belts Properly . . . . . . . 59 Seat Belts (cont'd)
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . 61
Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Replacing after a Crash . . . . . . . . . . . . . . . . . 65
Use During Pregnancy . . . . . . . . . . . . . . . . . . 64
Seats Adjustment, Front . . . . . . . . . . . . . . . . . . . . . . 50
Center Seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . 49
Heated and Ventilated, Front . . . . . . . . . . . 56
Heated, Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Lumbar Adjustment, Front . . . . . . . . . . . . . . 53
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Power Adjustment, Front . . . . . . . . . . . . . . . . 51
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Reclining Seatbacks . . . . . . . . . . . . . . . . . . . . . 52
Underseat Storage . . . . . . . . . . . . . . . . . . . . . 101
Securing Child Restraints . . . . . . . . . . 92, 96, 99
Security Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Vehicle Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202 Accessories and Modifications . . . . . . . . . 302
Climate Control System . . . . . . . . . . . . . . . . 196
Doing Your Own Work . . . . . . . . . . . . . . . . . 303
Electric Parking Brake Light . . . . . . . . . . . . 122 Service (cont'd)
Maintenance Records . . . . . . . . . . . . . . . . . . 391
Maintenance, General Information . . . . . 384
Parts Identification . . . . . . . . . . . . . . . . . . . . . 392
Scheduling Appointments . . . . . . . . . . . . . . 401
Services Special Application . . . . . . . . . . . . . . . . . . . . . 388
Servicing System . . . . . . . . . . . . . . . . . . . . . . . . . 171
Servicing the Airbag . . . . . . . . . . . . . . . . . . . . . . .73
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182
Shift Lock Control Function Check, Automatic Transmission . . . . . . . . . . . . . . . . 322
Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Out of Park . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Side Blind Zone Alert (SBZA) . . . . . . . . . . . . . 260
Signals, Turn and Lane-Change . . . . . . . . . . . .143
Snow Plow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
Software Updates . . . . . . . . . . . . . . . . . . . . . . . . .154
Special Application Services . . . . . . . . . . . . . . 388
Specifications and Capacities . . . . . . . . . . . . . 393
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Start Assist, Hill . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Start Vehicle, Remote . . . . . . . . . . . . . . . . . . . . . .22
Starting the Engine . . . . . . . . . . . . . . . . . . . . . . 225
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Column Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Fluid, Power . . . . . . . . . . . . . . . . . . . . . . . . . . . 315

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16504257) - 2023 - CRC - 5/9/22
Index 427
TractionControl System (TCS)/Electronic
Stability Control Light . . . . . . . . . . . . . . . . 124
Control/Electronic Stability Control . . . . 241
Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Trademarks and License Agreements . . . . . 189
Trailer Sway Control (TSC) . . . . . . . . . . . . . . . . . . . . 285
Tow Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Towing App . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Transfer Case Four-Wheel Drive . . . . . . . . . . . . . . . . . . . . . . 234
Transmission Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Fluid, Automatic . . . . . . . . . . . . . . . . . . . . . . . 309
Transportation Program, Courtesy . . . . . . . 401
Transporting a Disabled Vehicle . . . . . . . . . . . . . . . . . . . . . 370
Items That Can Catch Fire . . . . . . . . . . . . . . 33
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Truck Bed Camera Rearview Mirror . . . . . . . 43
Truck-Camper Loading Information . . . . . . . 219
TTY Users Customer Assistance . . . . . . . . . . . . . . . . . . . 398
Turn and Lane-Change Signals . . . . . . . . . . . .143
Turn Signal Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . 326U
Uniform Tire Quality Grading . . . . . . . . . . . . 353
Universal Remote System . . . . . . . . . . . . . . . . . 135Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Updates Map Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .158
Using Infotainment System . . . . . . . . . . . . . . . . . . 152
Navigation System . . . . . . . . . . . . . . . . . . . . . 160
This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
V
VehicleAhead Indicator . . . . . . . . . . . . . . . . . . . . . . . . 124
Alarm System . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Canadian Owners . . . . . . . . . . . . . . . . . . . . . . . . 2
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Data Recording and Privacy . . . . . . . . . . . . 405
Identification Number (VIN) . . . . . . . . . . . . 392
Load Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Remote Start . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Speed Messages . . . . . . . . . . . . . . . . . . . . . . . 135 Vehicle (cont'd)
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Vehicle Care Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
Vehicle Security Steering Column Lock . . . . . . . . . . . . . . . . . . . 35
Ventilation, Air . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Voice Recognition . . . . . . . . . . . . . . . . . . . . . . . . . 171
Voltmeter Gauge . . . . . . . . . . . . . . . . . . . . . . . . . 118
W
Warning
Brake System Light . . . . . . . . . . . . . . . . . . . . 122
Caution and Danger . . . . . . . . . . . . . . . . . . . . . 2
Hazard Flashers . . . . . . . . . . . . . . . . . . . . . . . . 142
Lane Departure (LDW) . . . . . . . . . . . . . . . . . 262
Lights, Gauges, and Indicators . . . . . . . . . . 111
Washer Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316
Wheels Alignment and Tire Balance . . . . . . . . . . . . 354
Different Size . . . . . . . . . . . . . . . . . . . . . . . . . . 353
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 354
When It Is Time for New Tires . . . . . . . . . . . . 351
Where to Put the Restraint . . . . . . . . . . . . . . . 80
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44