2025
2024

2025 SIERRA HEAVY DUTY  2025 SIERRA HEAVY DUTY 

BUILD & PRICE

OVERVIEW
PRO, SLE & SLT
AT4 & AT4X
DENALI & DENALI ULTIMATE
SPECS

OVERVIEW
PRO, SLE & SLT
AT4 & AT4X
DENALI & DENALI ULTIMATE
SPECS

2025 GMC SIERRA HEAVY DUTY

DENALI & DENALI ULTIMATE

SIERRA DENALI AS SHOWN: {{as_shown_price}}{{as_shown_price_disclosure}}

Back-side view of a 2025 GMC Sierra HD Denali Truck Parked on Gravel.

DENALI STARTING AT:

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AVAILABLE TOW UP TO

13,970 KG (30,800 LBS.) ^†

BUILD & PRICE

VIEW INVENTORY

KEY FEATURES

AVAILABLE

DURAMAX^® 6.6L TURBO-DIESEL V8 ENGINE WITH 975 LB.-FT. OF TORQUE AND 470 HP

OFFERS THE MOST

TRAILERING-ASSISTANCE TECHNOLOGIES IN ITS CLASS^†

STANDARD BEST-IN-CLASS^†

16-WAY POWER FRONT SEATS WITH MASSAGE FEATURE ON DENALI ULTIMATE

WORLD’S FIRST

SIX-FUNCTION MULTIPRO™ TAILGATE WITH AVAILABLE KICKER® AUDIO SYSTEM

UP TO

14 AVAILABLE CAMERA VIEWS^† INCLUDING TRANSPARENT TRAILER VIEW^†

AVAILABLE

MULTICOLOUR 15" DIAGONAL HEAD-UP DISPLAY

EXPLORE GMC SIERRA HD DENALI & DENALI ULTIMATE TRIMS

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DENALI

STARTING AT:

AVAILABLE TOW UP TO 13,970 KG (30,800 LBS.)^†

STARTING AT:

AVAILABLE TOW UP TO 13,970 KG (30,800 LBS.)^†

KEY FEATURES

20" Ultra-Bright machined wheels with bright chrome inserts^†
Denali-exclusive authentic open-pore wood, patterned aluminum trim and forge perforated leather seating surfaces
12-way heated and ventilated power front seats

 AVAILABLE FEATURES

Duramax 6.6L Turbo-Diesel V8 engine with Allison 10-speed automatic transmission
Power sunroof
Rear Camera Mirror^†

BUILD & PRICE

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DENALI ULTIMATE

STARTING AT:

AVAILABLE TOW UP TO 13,925 KG (30,700 LBS.)^†

STARTING AT:

AVAILABLE TOW UP TO 13,925 KG (30,700 LBS.)^†

KEY FEATURES

Duramax 6.6L Turbo-Diesel V8 engine with Allison 10-speed automatic transmission
Signature Vader Chrome grille with High Gloss Black surround and exclusive 20" Ultra-Bright machined aluminum wheels with gloss-black inserts^†
Exclusive Alpine Umber interior featuring full-grain leather seating, authentic open-pore Paldao wood and 16-way power front seats with massage feature
12-Speaker Bose^† Premium Series with Centerpoint^† surround sound
Illuminated power assist steps and MultiPro Tailgate Audio System by KICKER

 AVAILABLE FEATURES

Auxiliary trailer camera

BUILD & PRICE

DENALI ULTIMATE COLOURS

BUILD & PRICE LOCATE A DEALER

Side view of a 2025 GMC Sierra HD AT4 truck hauling a small trailer through a rocky terrain.

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DURAMAX 6.6L TURBO-DIESEL V8 ENGINE

Sierra Heavy Duty’s available Duramax 6.6L Turbo-Diesel V8 engine features an efficient turbocharger and Allison 10-speed automatic transmission.

VIEW DETAILS

Close-up view of the Rancho Shocks underneath the 2025 GMC Sierra HD AT4 truck.

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AT4 OFF-ROAD READINESS

AT4 features an off-road suspension with twin-tube Rancho shocks, skid plates and Hill Descent Control, which uses antilock braking to help you maintain control.

Close-up view of the trailer hook attached to the 2025 GMC Sierra HD AT4 truck.

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AT4X OFF-ROAD READINESS

The AT4X is prepared for the challenges of the trail with ground clearance of 11.6 inches, an approach angle of 31.6 degrees and a 25.7-degree departure angle.

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MULTIMATIC DSSV DAMPERS

Available AT4X-exclusive Multimatic DSSV dampers feature three separate spool valves to control damping and three connected chambers for fluid flow.

Close-up view of the Powertrain System underneath the 2025 GMC Sierra HD AT4 truck.

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REAR ELECTRONIC-LOCKING DIFFERENTIAL 

Tackle tough terrain with a rear electronic-locking differential on AT4X, which assures both wheels will spin together regardless of the amount of resistance to help keep traction in the rough backcountry.

Back-side view of a 2025 GMC Sierra HD AT4 hauling a large trailer on the road.

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PROGRADE® TRAILERING TECH

This advanced suite of available intelligent technologies helps streamline the hitching and towing process with integrated tools that help enhance your sense of confidence and visibility.

VIEW DETAILS

INTERIOR

Uncompromising luxury with premium amenities and our finest materials.

Close-up view of the intricate seat stitching in a 2025 GMC Sierra HD Denali Truck.

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PREMIUM DENALI INTERIOR

Sierra HD Denali’s interior distinguishes itself with aluminum trim, chrome accents, embroidered Denali logo and authentic open-pore walnut wood detailing.

Close-up view of the Front Seats, Steering Wheel, and Infotainment System in a 2025 GMC Sierra HD Denali Truck.

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LUXURIOUS DENALI ULTIMATE MATERIALS

Sierra HD Denali Ultimate’s exclusive Alpine Umber interior features full-grain leather seating, plaited contrast stitching, and embossed and laser-etched topographical map patterns of Mt. Denali’s summit.

Close-up view of the Seat Controls in a 2025 GMC Sierra HD Denali Truck.

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16-WAY POWER FRONT SEATS

Experience serious comfort in Sierra HD Denali Ultimate’s best-in-class^† 16-way power front seats with massaging feature.

EXTERIOR

Take on the world in first-class style.

Front-side view of a 2025 GMC Sierra HD Denali Truck Driving on an Open Road.

Front-side view of the 2025 GMC Sierra HD Denali Truck in the Desert.

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BOLD DENALI GRILLE

Stand out everywhere you go with Sierra HD Denali’s signature chrome grille, front bumper and exterior design.

Close-up view of the wheel on the 2025 GMC Sierra Denali Truck.

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20" DENALI WHEELS

Sierra HD Denali stands out with 20" Ultra-Bright machined wheels with bright chrome inserts.^†

Front-side view of the 2025 GMC Sierra HD Denali Truck Driving Through the Desert.

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DENALI ULTIMATE GRILLE

Stand out in Denali Ultimate style with its signature Vader chrome grille with High Gloss Black surround.

Close-up View of the Wheel on the 2025 GMC Sierra Denali Ultimate Truck.

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20" DENALI ULTIMATE WHEELS^†

Sierra HD Denali Ultimate features attractive 20" Ultra-Bright machined aluminum wheels with gloss-black inserts.^†

Close-up view of the front grilles on the 2025 GMC Sierra Denali Truck.

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LED PROJECTOR HEADLAMPS

LED projector headlamps feature GMC signature animated lighting sequences.

Close-up View of the lowered MultiPro Tailgate on the 2025 GMC Sierra Denali Truck.

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SIX-FUNCTION MULTIPRO TAILGATE

The world’s first MultiPro Tailgate combines six convenient functions that help improve loading, unloading and accessing the cargo bed.

VIEW DETAILS

Back View of the Truck Bed on the 2025 GMC Sierra HD Denali Truck.

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SPRAY-ON BEDLINER

Help protect the bed and enhance its style with durable cargo bed protection featuring a GMC logo.

TECHNOLOGY

Keep informed and in command.

A Driver Switching the Camera Views on the Infotainment Screen of a 2025 GMC Sierra HD Denali Truck

Close-up View of the Infotainment System with Android Auto in Use in a 2025 GMC Sierra HD Denali Truck.

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13.4" DIAGONAL CENTRE TOUCHSCREEN

This tablet-style touchscreen — the largest in its class^† — is the customizable, high-tech centrepiece of the cabin.

Close-up view of the Digital Cockpit in a 2025 GMC Sierra HD Denali Truck.

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12.3" DIAGONAL COLOUR DRIVER INFORMATION CENTRE

Control and customize important vehicle, driving and infotainment content in high-resolution clarity.

Close-up view of the Bose Speaker in a 2025 GMC Sierra HD Denali Truck.

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12-SPEAKER BOSE SOUND SYSTEM

The technologically advanced available 12-speaker Bose^† Premium Series with Centerpoint^† surround sound helps create a concert-like listening experience.

Close-up View of a person pressing the Infotainment Screen on the 2025 GMC Sierra HD Denali Truck.

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PREMIUM GMC INFOTAINMENT SYSTEM^†

With available Google built-in compatibility^†(subscription[s] required for full functionality), this system offers a helpful, personalized and seamless way to enhance your in-vehicle experience.

VIEW DETAILS

Close-up View of the Heads Up Display Feature in Use in a 2025 GMC Sierra HD Denali Truck.

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MULTICOLOUR 15" DIAGONAL HEAD-UP DISPLAY

The available multicolour 15" diagonal Head-Up Display helps keep important information like speed and alerts in clear view.

VIEW DETAILS

Transparent Trailer View being displayed in the infotainment screen of the 2025 GMC Sierra HD Pro/SLE/SLT.

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UP TO 14 CAMERA VIEWS^†

Get help seeing around your truck and compatible trailer with up to 14 available camera views,^† including the industry-first available transparent trailer view.^†

VIEW DETAILS

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ONSTAR^® BASICS^†

Drive more confidently with core OnStar services, including select remote commands,^† Automatic Crash Response^† and more to help you if you’re in need.

VIEW DETAILS

CAPABILITY

Strong, smart and advanced.

Wide Front Three-Quarters View of a 2025 GMC Sierra HD Denali Hauling a Trailer Through the Mountains at Dusk

View of the Trailering Guide Checklist Shown on the Infotainment System in a 2025 GMC Sierra HD Denali Truck

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PROGRADE® TRAILERING TECH

This advanced suite of available intelligent technologies helps streamline the hitching and towing process with integrated tools that help enhance your sense of confidence and visibility.

VIEW DETAILS

Wide Side View of a 2025 GMC Sierra HD Denali Truck Hauling a Trailer

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DURAMAX 6.6L TURBO-DIESEL V8 ENGINE

Sierra Heavy Duty’s available Duramax 6.6L Turbo-Diesel V8 engine features an efficient turbocharger and Allison 10-speed automatic transmission.

VIEW DETAILS

Wide Head-On View of a 2025 GMC Sierra HD Denali Truck Hauling a Trailer

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6.6L V8 GAS ENGINE

Sierra HD Denali’s standard 6.6L V8 gas engine is paired with the Allison 10-speed automatic transmission to help optimize power, torque and efficiency.

VIEW DETAILS

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ADAPTIVE CRUISE CONTROL^† WITH TRAILERING^†

This feature allows the luxury heavy-duty truck’s Adaptive Cruise Control to account for additional drag and increased braking distances when towing a trailer.

SAFETY

Front-side view of the 2025 GMC Sierra HD Denali parked alone in the desert.

SIERRA HD PRO SAFETY

Every Sierra Heavy Duty luxury truck includes active safety and driver assistance technologies that help while driving and trailering. Sierra HD Pro Safety includes:

Forward Collision Alert
Following Distance Indicator
Front Pedestrian Braking
IntelliBeam

Lane Departure Warning
Automatic Emergency Braking

VIEW MORE SAFETY DETAILS

Safety or driver assistance features are no substitute for the driver’s responsibility to operate the vehicle in a safe manner. Read the vehicle Owner’s Manual for important feature limitations and information.

2500 SPEC HIGHLIGHTS

2500 HD DENALI
2500 HD DENALI ULTIMATE

2500 HD DENALI

The Sierra 2500 HD Denali pickup truck comes in a 4WD Crew Cab model with a 6' 9" standard bed or an available 8' long bed.

MAX AVAILABLE GCWR

13,607 KG (30,000 lbs.)^†

WHEELBASE

3159.0"–172.0"

FRONT/REAR TREAD WIDTH

SRW: 68.4"/68.3"

MAX AVAILABLE GOOSENECK/FIFTH-WHEEL TRAILERING RATING

9,026 KG (19,900 lbs.)^†

GROUND CLEARANCE

10.3"

CARGO VOLUME

69.5–83.5 cu. ft.^†

MAX AVAILABLE CONVENTIONAL TRAILERING

9,071 KG (20,000 lbs.)^†

MAX AVAILABLE PAYLOAD

1,632 KG (3,599 lbs.)^†

VIEW DETAILED SPECS

2500 HD DENALI ULTIMATE

2025 GMC Sierra HD Denali Ultimate 2500 specs.

The Sierra 2500 HD Denali Ultimate pickup truck comes in a 4WD Crew Cab model with a 6' 9" standard bed or an available 8' long bed.

MAX AVAILABLE GCWR

13,607 kg (30,000 lbs.)^†

WHEELBASE

159.0"–172.0"

FRONT/REAR TREAD WIDTH

68.4"/68.3"

MAX AVAILABLE GOOSENECK/FIFTH-WHEEL TRAILERING RATING

8,754 kg (19,300 lbs.)^†

GROUND CLEARANCE

10.3"

CARGO VOLUME

69.5–83.5 cu. ft.^†

MAX AVAILABLE CONVENTIONAL TRAILERING

9,071 KG (20,000 lbs.)^†

MAX AVAILABLE PAYLOAD

1,595 KG (3,518 lbs.)^†

VIEW DETAILED SPECS

3500 SPEC HIGHLIGHTS

3500 HD DENALI
3500 HD DENALI ULTIMATE

3500 HD DENALI

The Sierra 3500 HD Denali pickup truck comes in a 4WD Crew Cab model with a 6' 9" standard bed or an available 8' long bed. Long bed is available with a Single Rear Wheel or Dual Rear Wheel configuration. 

MAX AVAILABLE GCWR

18,143 KG (40,000 lbs.)^†

WHEELBASE

159.0"–172.0" 

FRONT/REAR TREAD WIDTH

SRW: 68.4"/68.3" 
DRW: 68.8"/75.0"

MAX AVAILABLE GOOSENECK/FIFTH-WHEEL TRAILERING RATING

13,970 KG (30,800 lbs.)^†

GROUND CLEARANCE

SRW: 11.1"–11.2"   
DRW: 10.4"

CARGO VOLUME

69.5–83.5 cu. ft.^†

MAX AVAILABLE CONVENTIONAL TRAILERING

9,071 KG (20,000 lbs.)^†

MAX AVAILABLE PAYLOAD

2,761 KG(6,088 lbs.)^†

VIEW DETAILED SPECS

3500 HD DENALI ULTIMATE

2025 GMC Sierra HD Denali Ultimate 3500 specs.

The Sierra 3500 HD Denali Ultimate pickup truck comes in a 4WD Crew Cab model with either a 6' 9" standard bed or an available 8' long bed. Long bed is available with a Single Rear Wheel or Dual Rear Wheel configuration.

MAX AVAILABLE GCWR

18,143 KG (40,000 lbs.)^†

WHEELBASE

159.0"–172.0"

FRONT TREAD/REAR TREAD WIDTH

SRW: 68.4"/68.3" 
DRW: 68.8"/75.0"

MAX AVAILABLE GOOSENECK/FIFTH-WHEEL TRAILERING RATING

13,925 KG (30,700 lbs.)^†

CARGO VOLUME

69.5–83.5 cu. ft.^†

MAX AVAILABLE CONVENTIONAL TRAILERING

9,071 KG (20,000 lbs.)^†