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2025 GMC SIERRA HEAVY DUTY

AT4 & AT4X

AS SHOWN $83,080*

AT4 STARTING AT

$71,000*

AVAILABLE TOW UP TO

21,300 LBS.*

KEY FEATURES

EXCLUSIVE ON AT4X

FACTORY-INSTALLED 1.5" SUSPENSION LIFT

EXCLUSIVE ON AT4X

MULTIMATIC DSSV DAMPERS

STANDARD ON AT4

OFF-ROAD SUSPENSION WITH RANCHO® SHOCKS

EXCLUSIVE ON AT4X

35" GOODYEAR® TERRITORY MT TIRES

EXCLUSIVE ON AT4X

OBSIDIAN RUSH INTERIOR WITH FULL-GRAIN LEATHER SEATING

STANDARD ON AT4 & AT4X

13.4" DIAGONAL TOUCHSCREEN IS THE LARGEST IN ITS CLASS*

EXPLORE GMC SIERRA HD AT4 & AT4X TRIMS

As Shown $71,000*

AT4 

STARTING AT

$71,000*

AVAILABLE TOW UP TO

21,300 LBS.*

INCLUDES SLT STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES

  • Exclusive Jet Black interior with Kalahari accents, and heated and ventilated perforated front leather seating surfaces
  • Exclusive 20" gloss-black aluminum wheels with available BFGoodrich® off-road tires
  • Off-Road Suspension Package with twin-tube Rancho shocks and skid plates
  • Up to 14 available camera views* with HD Surround Vision*
  • Adaptive Cruise Control*

AVAILABLE FEATURES 

  • 15" diagonal Head-Up Display with off-road inclinometer

As Shown $83,845*

AT4X*

STARTING AT

$83,200*

AVAILABLE TOW UP TO

18,500 LBS.*

INCLUDES AT4 STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES

  • Factory-installed 1.5" suspension lift, Multimatic® DSSV dampers, rear electronic-locking differential, larger steel transfer case skid plate and front aluminum skid plate 
  • 35" Goodyear Territory MT tires
  • 16-way heated and ventilated power front seats with massage feature
  • Obsidian Rush interior featuring full-grain leather seating with technical-grain leather accents and authentic Vanta ash wood

AVAILABLE FEATURES 

  • AT4X AEV Edition featuring stamped steel bumpers, steering gear and transfer case skid plates, and 18" Salta gloss-black wheels
  • Duramax® 6.6L Turbo-Diesel V8 engine with Allison® 10-speed automatic transmission

As Shown $XX,XXX

PRO

STARTING AT

$XX,XXX

STANDARD FEATURES

  • TurboMax™  Engine Delivering 310 Horsepower and 430 lb.-ft. of Torque
  • 13.4" Diagonal Center Touchscreen
  • 12.3" Diagonal Driver Information Center
  • TurboMax™  Engine Delivering 310 Horsepower and 430 lb.-ft. of Torque
  • 13.4" Diagonal Center Touchscreen

AT4 COLORS

CAPABILITY

Serious adventure-ready hardware meets premium on-road comfort and world-class towing power.

AT4X AEV edition shown with available accessories.

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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. 

VIEW DETAILS

AT4X AEV Edition shown with available accessory winch.

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AT4X OFF-ROAD READINESS

The AT4X off-road truck 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. 

VIEW DETAILS

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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.

VIEW DETAILS

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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.

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PROGRADETM 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 safety, confidence and visibility.

EXTERIOR

Boldly designed and ruggedly functional.

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AT4 GRILLE

Stand out with AT4’s bold front-facing exterior design and LED projector headlamps with animated sequences.

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AT4X EXTERIOR

Available 35" Goodyear Territory MT tires and a factory-installed 1.5" suspension lift on Sierra HD AT4X and AT4X AEV Edition provide serious traction and clearance.

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20" AT4 WHEELS

Sierra HD AT4’s 20" gloss-black aluminum wheels with available BFGoodrich off-road tires are made for rough trails. 

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SPRAY-ON BEDLINER

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

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POWER-RETRACTABLE ASSIST STEPS 

This available feature includes LED perimeter lighting to help illuminate the way as you enter or exit.

SIERRA HD AT4X AEV EDITION

Tame the untamed in the Sierra HD AT4X AEV Edition. Equipped by off-road recreational driving and overland adventure travel experts American Expedition Vehicles (AEV®), this off-road pickup is engineered for the roughest terrain.

Available accessories shown.

AEV STAMPED-STEEL BUMPERS

AEV heavy-duty, stamped-steel, powder-coated front and rear bumpers offer added protection while summiting boulders and rough terrain.

AEV 18" SALTA® WHEELS

AEV racing-inspired Salta wheels with a 16-spoke design add to the AEV Edition’s rugged good looks.

Available accessories shown.

AEV STAMPED-STEEL SKID PLATES

Rugged underbody protection with stamped-steel skid plates helps keep vital components such as the steering gear and the transfer case protected from ruts, rocks, stumps and other challenges of the trail.

AEV EMBROIDERED FRONT HEAD RESTRAINTS

The heavy-duty off-road truck is accented with exclusive AEV embroidered badging on the front head restraints.

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AEV STAMPED-STEEL BUMPERS

AEV heavy-duty, stamped-steel, powder-coated front and rear bumpers offer added protection while summiting boulders and rough terrain.

Available accessories shown.

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AEV STAMPED-STEEL SKID PLATES

Rugged underbody protection with stamped-steel skid plates helps keep vital components such as the steering gear and the transfer case protected from ruts, rocks, stumps and other challenges of the trail.

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AEV 18" SALTA® WHEELS

AEV racing-inspired Salta wheels with a 16-spoke design add to the AEV Edition’s rugged good looks.

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AEV EMBROIDERED FRONT HEAD RESTRAINTS

The heavy-duty off-road truck is accented with exclusive AEV embroidered badging on the front head restraints.

AT4X VS. AT4X AEV

AT4X

GROUND CLEARANCE

11.6"

APPROACH ANGLE

31.6°

BREAKOVER ANGLE

21.2°

DEPARTURE ANGLE

25.7°

AT4X AEV

GROUND CLEARANCE

11.8"

APPROACH ANGLE

29.8°

BREAKOVER ANGLE

22.6°

DEPARTURE ANGLE

25.7°

INTERIOR

Take on the world in comfort and control. 

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AT4 INTERIOR

AT4’s Jet Black interior with Kalahari accents features heated and ventilated front seats with leather seating surfaces, and a wrapped heated steering wheel.

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AT4X EXCLUSIVE OBSIDIAN RUSH INTERIOR 

AT4X’s interior features authentic Vanta Ash wood, and seats include bold red and white double-needle stitching for athletic character. 

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16-WAY POWER FRONT SEATS

Experience serious comfort in Sierra HD AT4X’s best-in-class* 16-way power front seats with massaging feature.

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PREMIUM ALL-WEATHER FLOOR LINERS 

Help protect your interior with available floor liners with removable carpet inserts.

TECHNOLOGY

Keep informed and in command.

AT4X shown.

Available features shown.

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13.4" DIAGONAL CENTER TOUCHSCREEN

This tablet-style touchscreen — the largest in its class* — is the customizable, high-tech centerpiece of the cabin.

Available Head-Up Display shown.

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12.3" DIAGONAL COLOR DRIVER INFORMATION CENTER

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

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PREMIUM GMC INFOTAINMENT SYSTEM*

With available Google built-in compatibility,* this system offers a helpful, personalized and seamless way to enhance the entertainment in your truck.

VIEW DETAILS

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WIRELESS COMPATIBILITY

Connect your compatible smartphone to access a more integrated in-vehicle experience with Apple CarPlay®* or Android Auto™* compatibility.

SAFETY

SIERRA HD PRO SAFETY

Every Sierra Heavy Duty off-road 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
Buckle to Drive
Automatic Emergency Braking

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.

SPEC HIGHLIGHTS

2500 HD AT4

The Sierra 2500 HD AT4 off-road work truck comes in a 4WD Crew Cab model with a 6' 9" standard bed or an available 8' long bed. 

MAX AVAILABLE CONVENTIONAL TRAILERING

18,500 lbs.*

MAX AVAILABLE GCWR

30,000 lbs.*

WHEELBASE

159.0" – 172.0"

FRONT/REAR TREAD WIDTH

68.4"/68.3" SRW

MAX AVAILABLE GOOSENECK/FIFTH-WHEEL TRAILERING RATING

21,190 lbs.*

GROUND CLEARANCE

10.1"

CARGO VOLUME

69.5–83.5 cu. ft.*

MAX AVAILABLE PAYLOAD

3,658 lbs.*

3500 HD AT4

The Sierra 3500 Heavy Duty off-road truck comes in a 4WD Crew Cab model with a 6' 9" standard bed or an available 8' long bed. Single Rear Wheel only. 

MAX AVAILABLE CONVENTIONAL TRAILERING

20,000 lbs.*

MAX AVAILABLE GCWR

30,000 lbs.*

WHEELBASE

159.0" – 172.0"

FRONT/REAR TREAD WIDTH

68.4"/68.3" SRW

MAX AVAILABLE GOOSENECK/FIFTH-WHEEL TRAILERING RATING

21,300 lbs.*

GROUND CLEARANCE

11.1"-11.2"

CARGO VOLUME

69.5–83.5 cu. ft.*

MAX AVAILABLE PAYLOAD

4,127 lbs.*

2500 HD AT4X

The Sierra 2500 HD AT4X off-road truck comes in a 4WD Crew Cab model with a 6' 9" standard bed. Single Rear Wheel only.

MAX AVAILABLE CONVENTIONAL TRAILERING

18,500 lbs.*

MAX AVAILABLE GCWR

27,500 lbs.*

WHEELBASE

159.0"

FRONT/REAR TREAD WIDTH

69.4"/69.3" SRW

MAX AVAILABLE GOOSENECK/FIFTH-WHEEL TRAILERING RATING

18,000 lbs.*

GROUND CLEARANCE

11.6"

CARGO VOLUME

69.5 cu. ft.*

MAX AVAILABLE PAYLOAD

3,304 lbs.*

3500 SPEC HIGHLIGHTS

3500 CREW CAB

The Sierra 3500 Heavy Duty pickup truck comes in 2WD and 4WD Crew Cab models 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 CONVENTIONAL TRAILERING

20,000 lbs.

MAX AVAILABLE GOOSENECK/FIFTH-WHEEL TRAILERING RATING

31,450 lbs.

MAX GCWR

40,000 lbs.

GROUND CLEARANCE

SRW:

11.1"–11.2"

DRW:

10.4"

WHEELBASE

159.0" – 172.0"

CARGO VOLUME

69.5–83.5 cu. ft.

FRONT/REAR TREAD WIDTH

SRW:

68.4"/68.3"

DRW:

68.8"/75.0"

MAX PAYLOAD

6,663 lbs.

3500 DOUBLE CAB

The Sierra 3500 Heavy Duty pickup truck comes in 2WD and 4WD Double Cab models with an 8' long bed Single Rear Wheel or Dual Rear Wheel configuration.

MAX GCWR

40,000 lbs.

GROUND CLEARANCE

SRW:

11.2"

DRW:

10.4"

WHEELBASE

162.5"

CARGO VOLUME

83.5 cu. ft.

MAX AVAILABLE GOOSENECK/FIFTH-WHEEL TRAILERING RATING

31,580 lbs.

MAX AVAILABLE CONVENTIONAL TRAILERING

20,000 lbs.

FRONT TREAD/REAR TREAD WIDTH

SRW:

68.4"/68.3"

DRW:

68.8"/75.0"

MAX PAYLOAD

6,776 lbs.

3500 REGULAR CAB

The Sierra 3500 Heavy Duty pickup truck comes in 2WD and 4WD Regular Cab models with an 8' long bed Single Rear Wheel or Dual Rear Wheel configuration.

MAX GCWR

43,900 lbs.

GROUND CLEARANCE

SRW:

11.2"

DRW:

10.5"

WHEELBASE

141.5" 

CARGO VOLUME

83.5 cu. ft.

MAX AVAILABLE GOOSENECK/FIFTH-WHEEL TRAILERING RATING

36,000 lbs./32,000 lbs.

MAX AVAILABLE CONVENTIONAL TRAILERING

20,000 lbs.

FRONT TREAD/REAR TREAD WIDTH

SRW:

68.4"/68.3"

DRW:

68.8"/75.0"

MAX PAYLOAD

7,234 lbs.

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Due to current supply-chain shortages, certain features shown have limited or late availability, or are no longer available. See the window label or a dealer regarding the features on an individual vehicle.