
GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
390 Vehicle Care
Vinyl/Rubber
If equipped with vinyl floor and rubber floor
mats, use a soft cloth and/or brush
dampened with water to remove dust and
loose dirt. For more thorough cleaning, use
a mild soap and water solution.
{Warning
Do not use cleaners that contain silicone,
wax-based products, or cleaners that
increase gloss on vinyl/rubber floor and
mats. These cleaners can permanently
change the appearance and feel of the
vinyl/rubber and can make the floor
slippery. Your foot could slip while
operating the vehicle, and you could lose
control, resulting in a crash. You or
others could be injured.
Fabric/Carpet/Suede
Start by vacuuming the surface using a soft
brush attachment. If a rotating vacuum
brush attachment is being used, only use it
on the floor carpet. Before cleaning, gently
remove as much of the soil as possible:
.Gently blot liquids with a paper towel.
Continue blotting until no more soil can
be removed.
.For solid soils, remove as much as
possible prior to vacuuming.
To clean: 1. Saturate a clean, lint-free colorfast cloth with water. Microfiber cloth is
recommended to prevent lint transfer to
the fabric or carpet.
2. Remove excess moisture by gently wringing until water does not drip from
the cleaning cloth.
3. Start on the outside edge of the soil and gently rub toward the center. Fold the
cleaning cloth to a clean area frequently
to prevent forcing the soil into the
fabric.
4. Continue gently rubbing the soiled area until there is no longer any color
transfer from the soil to the cleaning
cloth.
5. If the soil is not completely removed, use a mild soap solution followed only
by plain water.
If the soil is not completely removed, it may
be necessary to use a commercial upholstery
cleaner or spot lifter. Test a small hidden
area for colorfastness before using a commercial upholstery cleaner or spot lifter.
If ring formation occurs, clean the entire
fabric or carpet.
After cleaning, use a paper towel to blot
excess moisture.
Cleaning High Gloss Surfaces and Vehicle
Information and Radio Displays
Use a microfiber cloth on high gloss surfaces
or vehicle displays. First, use a soft bristle
brush to remove dirt that can scratch the
surface. Then gently clean by rubbing with a
microfiber cloth. Never use window cleaners
or solvents. Periodically hand wash the
microfiber cloth separately, using mild soap.
Do not use bleach or fabric softener. Rinse
thoroughly and air dry before next use.
Caution
Do not attach a device with a suction cup
to the display. This may cause damage
and would not be covered by the vehicle
warranty.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
Customer Information 405
Customer Information
Customer Information
Customer Satisfaction Procedure . . . . . . 405
Customer Assistance Offices . . . . . . . . . . . 407
Customer Assistance for Text Telephone(TTY) Users . . . . . . . . . . . . . . . . . . . . . . . . . . 407
Online Account . . . . . . . . . . . . . . . . . . . . . . . . 407
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408
Roadside Assistance Program . . . . . . . . . 408
Scheduling Service Appointments . . . . . . 410
Courtesy Transportation Program . . . . . 410
Collision Damage Repair . . . . . . . . . . . . . . . 411
Publication Ordering Information . . . . . . 413
Radio Frequency Statement . . . . . . . . . . . . 413
Reporting Safety Defects
Reporting Safety Defects to the United States Government . . . . . . . . . . . . . . . . . . 414
Reporting Safety Defects to the Canadian Government . . . . . . . . . . . . . . . 414
Reporting Safety Defects to General Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414
Vehicle Data Recording and Privacy
Vehicle Data Recording and Privacy . . . . 415
Cybersecurity . . . . . . . . . . . . . . . . . . . . . . . . . . 415
Event Data Recorders . . . . . . . . . . . . . . . . . . 415
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 416
Infotainment System . . . . . . . . . . . . . . . . . . 416Customer Information
Customer Satisfaction Procedure
Your satisfaction and goodwill are important
to your dealer and to GMC. Normally, any
concerns with the sales transaction or the
operation of the vehicle will be resolved by
your dealer's sales or service departments.
Sometimes, however, despite the best
intentions of all concerned,
misunderstandings can occur. If your concern
has not been resolved to your satisfaction,
the following steps should be taken:
STEP ONE : Discuss your concern with a
member of dealership management.
Normally, concerns can be quickly resolved
at that level. If the matter has already been
reviewed with the sales, service, or parts
manager, contact the owner of your
dealership or the general manager.
STEP TWO : If after contacting a member of
dealership management, it appears your
concern cannot be resolved by your
dealership without further help, in the U.S.,
call 1-800-462-8782. In Canada, call General
Motors of Canada Customer Care Centre at
1-800-263-3777 (English), or 1-800-263-7854
(French).

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
Customer Information 413
vehicle repaired with Genuine GM parts,
even if your insurance coverage does not
pay the full cost.
If another party's insurance company is
paying for the repairs, you are not obligated
to accept a repair valuation based on that
insurance company's collision policy repair
limits, as you have no contractual limits
with that company. In such cases, you can
have control of the repair and parts choices
as long as the cost stays within reasonable
limits.
Publication Ordering Information
Service Manuals
Service manuals have the diagnosis and
repair information on the engine/propulsion,
transmission, axle, suspension, brakes,
electrical system, steering system, body, etc.
Customer Literature
Owner’s manuals are written specifically for
owners and are intended to provide basic
operational information about the vehicle.
The owner’s manual includes the
Maintenance Schedule for all models.Customer literature publications available for
purchase include owner’s manuals, warranty
manuals, and portfolios. Portfolios include an
owner’s manual, warranty manual,
if applicable, and zip lock bag or pouch.
Current and Past Models
Service manuals and customer literature are
available for many GM vehicles.
To check availability and to order,
call 1-800-551-4123 Monday–Friday,
8:00 a.m.–6:00 p.m. Eastern Time
For credit card orders only (VISA,
MasterCard, or Discover), see Helm, Inc. at:
www.helminc.com.
To order by mail, write to:
Helm, Incorporated
Attention: Customer Service
47911 Halyard Drive
Plymouth, MI 48170
Make checks payable in U.S. funds.
Radio Frequency Statement
This vehicle uses license-exempt
transmitters / receivers / systems that
operate on a radio frequency that complies
with Part 15/Part 18 of the Federal
Communications Commission (FCC) rules and
with Innovation, Science and Economic
Development (ISED) Canada's license-exempt
RSS(s) / RSP-100 / ICES-GEN.
Operation is subject to the following two
conditions:
1. The device may not cause harmful interference.
2. The device must accept any interference received, including interference that may
cause undesired operation of the device.
Changes or modifications to any of these
systems by other than an authorized service
facility could void authorization to use this
equipment.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
Customer Information 415
Vehicle Data Recording and
Privacy
The vehicle has a number of computers that
record information about the vehicle’s
performance and how it is driven or used.
For example, the vehicle uses computer
modules to monitor and control engine and
transmission performance, to monitor the
conditions for airbag deployment and
deploy them in a crash, and, if equipped, to
provide antilock braking to help the driver
control the vehicle. These modules may
store data to help the dealer technician
service the vehicle or to help GM improve
safety or features. Some modules may also
store data about how the vehicle is
operated, such as rate of fuel consumption
or average speed. These modules may retain
personal preferences, such as radio presets,
seat positions, and temperature settings.
Cybersecurity
GM collects information about the use of
your vehicle including operational and safety
related information. We collect this
information to provide, evaluate, improve,
and troubleshoot our products and services
and to develop new products and services.
The protection of vehicle electronics systems
and customer data from unauthorized
outside electronic access or control is
important to GM. GM maintains appropriate
security standards, practices, guidelines and
controls aimed at defending the vehicle and
the vehicle service ecosystem against
unauthorized electronic access, detecting
possible malicious activity in related
networks, and responding to suspected
cybersecurity incidents in a timely,
coordinated and effective manner. Security
incidents could impact your safety or
compromise your private data. To minimize
security risks, please do not connect your
vehicle electronic systems to unauthorized
devices or connect your vehicle to any
unknown or untrusted networks (such as
Bluetooth, WIFI or similar technology). In
the event you suspect any security incident
impacting your data or the safe operation of
your vehicle, please stop operating your
vehicle and contact your dealer.
Event Data Recorders
This vehicle is equipped with an Event Data
Recorder (EDR). The main purpose of an EDR
is to record, in certain crash or near
crash-like situations, such as an air bag
deployment or hitting a road obstacle, data
that will assist in understanding how a
vehicle’s systems performed. The EDR is
designed to record data related to vehicle
dynamics and safety systems for a short
period of time, typically 30 seconds or less.
The EDR in this vehicle is designed to record
such data as:
.How various systems in your vehicle were
operating;
.Whether or not the driver and passenger
safety belts were buckled/fastened;
.How far (if at all) the driver was
depressing the accelerator and/or brake
pedal; and,
.How fast the vehicle was traveling.
These data can help provide a better
understanding of the circumstances in which
crashes and injuries occur.
Note
EDR data are recorded by your vehicle only
if a non-trivial crash situation occurs; no
data are recorded by the EDR under normal

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
OnStar 419
OnStar Additional
Information
In-Vehicle Audio Messages
Audio messages may play important
information at the following times:
.Prior to vehicle purchase. PressQto set
up an account.
.After change in ownership and at
90 days.
Transferring Service
PressQto request account transfer
eligibility information. The Advisor can
cancel or change account information.
Selling/Transferring the Vehicle
Call 1-888-4ONSTAR (1-888-466-7827)
immediately to terminate your OnStar or
connected services if the vehicle is disposed
of, sold, transferred, or if the lease ends.
Reactivation for Subsequent Owners
PressQand follow the prompts to speak to
an Advisor as soon as possible. The Advisor
will update vehicle records and explain
OnStar or connected service options.
How OnStar Service Works
Automatic Crash Response, Emergency
Services, Crisis Assist, Stolen Vehicle
Assistance, Remote Services, and Roadside
Assistance are available on most vehicles.
Not all OnStar services are available
everywhere or on all vehicles. For more
information, a full description of OnStar
services, system limitations, and OnStar User
Terms, Privacy Statement, and Software
Terms:
.Call 1-888-4ONSTAR (1-888-466-7827).
.See www.onstar.com (U.S.).
.See www.onstar.ca (Canada).
.Call TTY 1-877-248-2080.
.PressQto speak with an Advisor.
OnStar or connected services cannot work
unless the vehicle is in a place where OnStar
has an agreement with a wireless service
provider for service in that area. The
wireless service provider must also have
coverage, network capacity, reception, and
technology compatible with OnStar or
connected services. Service involving location
information about the vehicle cannot work
unless GPS signals are available,
unobstructed, and compatible with the
OnStar hardware. OnStar or connected services may not work if the OnStar
equipment is not properly installed or it has
not been properly maintained. If equipment
or software is added, connected,
or modified, OnStar or connected services
may not work. Other problems beyond the
control of OnStar
—such as hills, tall
buildings, tunnels, weather, electrical system
design and architecture of the vehicle,
damage to the vehicle in a crash, or wireless
phone network congestion or jamming —
may prevent service.
See Radio Frequency Statement 0413.
Services for People with Disabilities
Advisors provide services to help with
physical disabilities and medical conditions.
Press
Qto help:
.Locate a gas station with an attendant to
pump gas.
.Find a hotel, restaurant, etc., that meets
accessibility needs.
.Provide directions to the closest hospital
or pharmacy in urgent situations.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
OnStar 421
Vehicle and Power Issues
OnStar services require a vehicle electrical
system, wireless service, and GPS satellite
technologies to be available and operating
for features to function properly. These
systems may not operate if the battery is
discharged or disconnected.
Add-on Electrical Equipment
The OnStar system is integrated into the
electrical architecture of the vehicle. Do not
add any electrical equipment. SeeAdd-On
Electrical Equipment 0306. Added electrical
equipment may interfere with the operation
of the OnStar system and cause it to not
operate.
Vehicle Software Updates
OnStar or GM may remotely deliver
software updates or changes to the vehicle
without further notice or consent. These
updates or changes may enhance or
maintain safety, security, or the operation
of the vehicle or the vehicle systems.
Software updates or changes may affect or
erase data or settings that are stored in the
vehicle, such as saved navigation
destinations or pre-set radio stations.
Neither OnStar nor GM is responsible for
any affected or erased data or settings. These updates or changes may also collect
personal information. Such collection is
described in the OnStar privacy statement or
separately disclosed at the time of
installation. These updates or changes may
also cause a system to automatically
communicate with GM servers to collect
information about vehicle system status,
identify whether updates or changes are
available, or deliver updates or changes. An
active OnStar agreement constitutes consent
to these software updates or changes and
agreement that either OnStar or GM may
remotely deliver them to the vehicle.
Privacy
The complete OnStar Privacy Statement may
be found at www.onstar.com (U.S.),
or www.onstar.ca (Canada). We recommend
that you review it. If you have any
questions, call 1-888-4ONSTAR
(1-888-466-7827) or press
Qto speak with
an Advisor. Users of wireless
communications are cautioned that the
privacy of any information sent via wireless
cellular communications cannot be assured.
Third parties may unlawfully intercept or
access transmissions and private
communications without consent.
OnStar - Software Acknowledgements
To obtain the source code under GPL, LGPL,
MPL, and other open source licenses, that is
contained in this product, please visit
https://opensource.lge.com. In addition to
the source code, all referred license terms,
warranty disclaimers, and copyright notices
are available for download. This offer is valid
for a period of three years after our last
shipment of this product. This offer is valid
to anyone in receipt of this information.
*Provided through LG Electronics Inc., who is
solely responsible for provisions of related
OSS compliance.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
Index 425
IndexA
Accessories and Modifications . . . . . . . . . . . 310
Accessory Power . . . . . . . . . . . . . . . . . . . . . . . . . 220
AdaptiveCruise Control . . . . . . . . . . . . . . . . . . . . . . . . . 241
Add-On Electrical Equipment . . . . . . . . . . . . . 306
Adding a Snow Plow or Similar Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306
Additional OnStar Information . . . . . . . . . . . . . . . . . . . . 419
Adjustments Lumbar, Front Seats . . . . . . . . . . . . . . . . . . . . 50
Advanced Driver Assistance Systems . . . . . . . . . . . . . 252
Agreements Trademarks and License . . . . . . . . . . . . . . . 188
Air Cleaner/Filter, Engine . . . . . . . . . . . . . . . . . . 318
Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Filter Life System . . . . . . . . . . . . . . . . . . . . . . . 317
Filter, Passenger Compartment . . . . . . . . 196
Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Airbag System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
How Does an Airbag Restrain? . . . . . . . . . . 68
Passenger Sensing System . . . . . . . . . . . . . . 69
What Makes an Airbag Inflate? . . . . . . . . . 68 Airbag System (cont'd)
What Will You See after an Airbag
Inflates? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
When Should an Airbag Inflate? . . . . . . . . 67
Where Are the Airbags? . . . . . . . . . . . . . . . . 66
Airbags Adding Equipment to the Vehicle . . . . . . . 73
Passenger Status Indicator . . . . . . . . . . . . . . 121
Readiness Light . . . . . . . . . . . . . . . . . . . . . . . . . 121
Replacing System Parts after a
Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Servicing Airbag-Equipped Vehicles . . . . . . 73
Alarm Vehicle Security . . . . . . . . . . . . . . . . . . . . . . . . 32
Alert Lane Change (LCA) . . . . . . . . . . . . . . . . . . . . . 268
Rear Cross Traffic . . . . . . . . . . . . . . . . . . . . . . 263
All-Season Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 345
All-Terrain Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 346
AM-FM Radio . . . . . . . . . . . . . . . . . . . . . . . . 159, 161
Antenna Multi-band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Antilock Brake System (ABS) . . . . . . . . . . . . . 233 Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . 125
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 383
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388
Apple CarPlay and Android Auto . . . . . 177, 179

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
Index 429
Engine (cont'd)Running While Parked . . . . . . . . . . . . . . . . . 223
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Equipment, Towing . . . . . . . . . . . . . . . . . . . . . . 284
Event Data Recorders . . . . . . . . . . . . . . . . . . . . .415
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Extended Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . .35
Extended Parking . . . . . . . . . . . . . . . . . . . . . . . . 222
Extender, Seat Belt . . . . . . . . . . . . . . . . . . . . . . . 63
Exterior Cargo Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Lamp Controls . . . . . . . . . . . . . . . . . . . . . . . . . 143
Lamps Off Reminder . . . . . . . . . . . . . . . . . . . 145
Lighting Battery Saver . . . . . . . . . . . . . . . . . 152
F
Fan
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Filter Engine Air Cleaner . . . . . . . . . . . . . . . . . . . . . 318
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145
Flashers, Hazard Warning . . . . . . . . . . . . . . . . 146
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365
Floor Console
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 391 Fluid
Automatic Transmission . . . . . . . . . . . . . . . . 317
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326
Power Steering . . . . . . . . . . . . . . . . . . . . . . . . 323
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Fog Lamp Light Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Fog Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Four-Wheel Drive . . . . . . . . . . . . . . . . . . . 228, 329
Four-Wheel-Drive Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413
Front Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329
Heated and Ventilated Seats . . . . . . . . . . . . 54
Front Seats Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
E85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Economy, Driving for Better . . . . . . . . . . . 199
Filling a Portable Fuel Container . . . . . . . 276
Filling the Tank . . . . . . . . . . . . . . . . . . . . 273, 275
Foreign Countries . . . . . . . . . . . . . . . . . . . . . . 272
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Low Fuel Warning Light . . . . . . . . . . . . . . . 129 Fuel (cont'd)
Prohibited Fuels . . . . . . . . . . . . . . . . . . . . . . . 272
Recommended . . . . . . . . . . . . . . . . . . . . . . . . . 272
Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
Full-Size Spare Tire . . . . . . . . . . . . . . . . . . . . . . . 375
Fuses Engine Compartment Fuse Block . . . . . . . 337
Fuses and Circuit Breakers . . . . . . . . . . . . . 337
Instrument Panel Fuse Block . . . . . . 341, 342
G
Garage Door Opener . . . . . . . . . . . . . . . . . . . . . 140
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
Gauges Engine Coolant Temperature . . . . . . . . . . . . 118
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . . 117
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Transmission Temperature . . . . . . . . . . . . . . 119
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Warning Lights and Indicators . . . . . . . . . . 111
General Information
Service and Maintenance . . . . . . . . . . . . . . 393
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276