CURRENT OFFERS
VIEW INVENTORY
BUILD & PRICE
REQUEST A QUOTE
2025 GMC SIERRA HEAVY DUTY
AT4 & AT4X
AT4 STARTING AT
$71,000*
AVAILABLE TOW UP TO
21,300 LBS.*
KEY FEATURES
EXPLORE GMC SIERRA HD AT4 & AT4X TRIMS
As Shown $71,000
AT4
STARTING AT
$71,000*
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*
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
AT4 COLORS
CAPABILITY
Serious adventure-ready hardware meets premium on-road comfort and world-class towing power.
AT4X AEV edition shown with available accessories.
2 of 6
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.
AT4X AEV Edition shown with available accessory winch.
3 of 6
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.
4 of 6
MULTIMATIC DSSV DAMPERS
Available AT4X-exclusive Multimatic DSSV dampers feature three separate spool valves to control damping and three connected chambers for fluid flow.
5 of 6
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.
EXTERIOR
Boldly designed and ruggedly functional.
1 of 6
AT4 GRILLE
Stand out with AT4’s bold front-facing exterior design and LED projector headlamps with animated sequences.
2 of 6
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.
3 of 6
20" AT4 WHEELS
Sierra HD AT4’s 20" gloss-black aluminum wheels with available BFGoodrich off-road tires are made for rough trails.
4 of 6
SPRAY-ON BEDLINER
Help protect the bed and enhance its style with durable cargo bed protection featuring a GMC logo.
5 of 6
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.
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.
1 of 4
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.
2 of 4
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.
3 of 4
16-WAY POWER FRONT SEATS
Experience serious comfort in Sierra HD AT4X’s best-in-class
4 of 4
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.
1 of 6
13.4" DIAGONAL CENTER TOUCHSCREEN
This tablet-style touchscreen is the customizable, high-tech centerpiece of the cabin.
Available Head-Up Display shown.
2 of 6
12.3" DIAGONAL COLOR DRIVER INFORMATION CENTER
Control and customize important vehicle, driving and infotainment content in high-resolution clarity.
5 of 6
PREMIUM GMC INFOTAINMENT SYSTEM*
With available Google built-in compatibility,
VIEW DETAILS
6 of 6
WIRELESS COMPATIBILITY
Connect your compatible smartphone to access a more integrated in-vehicle experience with Apple CarPlay®
SAFETY AND DRIVER ASSISTANCE
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
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.*
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.*
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
