2024
2023

2023 SIERRA HD AT4 2023 SIERRA HD AT4

BUILD & PRICE

MODEL OVERVIEW
TRIM DETAILS
FEATURES
GALLERY
SPECS
ACCESSORIES

MODEL OVERVIEW
TRIM DETAILS
FEATURES
GALLERY
SPECS
ACCESSORIES

2023 SIERRA
HD AT4

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2023 SIERRA
HD AT4

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UP TO

15 AVAILABLE CAMERA VIEWS^†

WORLD'S FIRST SIX-FUNCTION

MULTIPRO™️ TAILGATE

FIRST HD IN ITS CLASS^† WITH AVAILABLE

ALLISON^®† 10-SPEED TRANSMISSION

FIRST HD IN ITS CLASS^† WITH AVAILABLE

HEAD-UP DISPLAY & REAR CAMERA MIRROR^†

BEST-IN-CLASS^†

HD CARGO BED VOLUME

BEST-IN-CLASS^†

MORE CREW CAB FRONT HEAD & LEG ROOM THAN ANY COMPETITOR

INDUSTRY-FIRST^† AVAILABLE

TRANSPARENT TRAILER VIEW^†

STARTING AT:

AVAILABLE MAX TOWING UP TO

9584 KG (21,130 LB.)^†

AVAILABLE MAX PAYLOAD UP TO

1903 KG (4196 LB.)^†

MAX TORQUE UP TO

910 LB.-FT.^†

TOTAL CREDITS

^†

(Change)

FEATURE HIGHLIGHTS

2023 GMC Sierra HD AT4 trailering off-road.

OFF-ROAD WITHOUT COMPROMISE

Built to power you and your trailer off-road, the Sierra HD AT4 offers towing up to 9584 KG (21,130 LB.)^†

MORE CAPABILITY FEATURES

U.S. MODEL SHOWN.

Man drives the 2023 Sierra AT4 off-road.

SOME FEATURES SHOWN MAY HAVE LIMITED, LATE OR NO AVAILABILITY.
SEE DEALER FOR FEATURE AVAILABILITY. U.S. MODEL SHOWN.

POWERFUL INNOVATION

The available HD Surround Vision^† system provides up to 15 available camera views^† and available multicolour 15" diagonal Head-Up Display with Off-Road Inclinometer helps drivers stay connected and in command.

MORE TECHNOLOGY & SAFETY FEATURES

DISTINCTIVE BOLD EXTERIOR

Sierra HD AT4’s adventurous exterior appearance comes complete with premium black chrome finishes, modern red details, best-in-class^† heavy-duty Cargo Bed Volume and a heap of truck bed features including 12 cargo tie-downs rated at 227 KG (500 LB.) per corner and a spray-on bedliner with AT4 logo.

MORE EXTERIOR FEATURES

U.S. MODEL SHOWN.

SOME FEATURES SHOWN MAY HAVE LIMITED, LATE OR NO AVAILABILITY.
SEE DEALER FOR FEATURE AVAILABILITY. U.S. MODEL SHOWN.

EXCLUSIVE ATHLETIC INTERIOR

The comfortable, expansive cabin features a unique Jet Black athletic interior with Kalahari accents that gives the Sierra HD AT4 durability with a premium feel.

MORE INTERIOR FEATURES

AT4 CAPABILITY HIGHLIGHTS

OFF-ROAD SUSPENSION WITH RANCHO^® SHOCKS AND SKID PLATES

ADVANCED ENGINES

HIGH-STRENGTH CHASSIS AND SUSPENSION

NEXT-LEVEL GROUND CLEARANCE

MADE FOR OFF-ROAD

AVAILABLE AT4 HIGH CLEARANCE STEP

2023 GMC Sierra HD AT4 driving off-road.

OFF-ROAD SUSPENSION WITH RANCHO^®† SHOCKS AND SKID PLATES

AT4’s Twin-Tube Rancho^®† shocks provide dampening when going off road, skid plates provide added protection for underbody components and Eaton^®† locking rear differential helps give you traction to handle rugged terrain.

OFF-ROAD SUSPENSION WITH RANCHO^®† SHOCKS AND SKID PLATES

2023 GMC Sierra HD AT4 Standard 6.6L V8 Gas Engine with 6-Speed Automatic Transmission.

ADVANCED ENGINES

Standard 6.6L V8 Gas Engine with 6-Speed Automatic Transmission
- 401 hp and 464 lb.-ft. of torque
Available 6.6L Duramax^® Turbo-Diesel V8 Engine with Allison^®† 10-Speed Automatic Transmission
- 445 hp and 910 lb.-ft. of torque
- Large variable-speed cooling fan and dual path air induction system
- Factory-installed diesel after-run function
- Intelligent diesel exhaust brake system

ADVANCED ENGINES

Standard 6.6L V8 Gas Engine with 6-Speed Automatic Transmission
- 401 hp and 464 lb.-ft. of torque
Available 6.6L Duramax^® Turbo-Diesel V8 Engine with Allison^®† 10-Speed Automatic Transmission
- 445 hp and 910 lb.-ft. of torque
- Large variable-speed cooling fan and dual path air induction system
- Factory-installed diesel after-run function
- Intelligent diesel exhaust brake system

2023 GMC Sierra HD AT4 driving and trailering off-road.

HIGH-STRENGTH CHASSIS AND SUSPENSION

The strong chassis and suspension are built upon a fully boxed, ladder-type frame built from high-strength steel using front hydroformed rails with clamshell design. The powerful frame and optimized body structure works in conjunction with large driveline components that feature high-strength axles and ring gears to bring immediate torque to ground for power while towing and off-roading.

HIGH-STRENGTH CHASSIS AND SUSPENSION

NEXT-LEVEL GROUND CLEARANCE

To assist in clearing rugged terrain, available Sierra HD AT4 offers over 10 inches of ground clearance along with a maximum approach angle of nearly 27 degrees on select models.

NEXT-LEVEL GROUND CLEARANCE

To assist in clearing rugged terrain, available Sierra HD AT4 offers over 10 inches of ground clearance along with a maximum approach angle of nearly 27 degrees on select models.

U.S. MODEL SHOWN

MADE FOR OFF-ROAD

First HD in its class^† to offer a 2-speed AutoTrac^TM transfer case with an active automatic 4WD drive setting, which provides seamless shifting between two- and four-wheel drive based on road conditions
Hill Descent Control
Skid plates provide added underbody protection
Equipped with Off-Road Mode
Standard 18" machined aluminum wheels with Dark Grey metallic accents (as shown), with standard All Terrain blackwall tires and available mud terrain tires (2500 models only)
Available 20" machined aluminum wheels with high-gloss black accents, with All Terrain black wall tires

MADE FOR OFF-ROAD

First HD in its class^† to offer a 2-speed AutoTracTM transfer case with an active automatic 4WD drive setting, which provides seamless shifting between two- and four-wheel drive based on road conditions
Hill Descent Control
Skid plates provide added underbody protection
Equipped with Off-Road Mode
Standard 18" machined aluminum wheels with Dark Grey metallic accents (as shown), with standard All Terrain blackwall tires and available mud terrain tires (2500 models only)
Available 20" machined aluminum wheels with high-gloss black accents, with All Terrain black wall tires

AVAILABLE AT4 HIGH CLEARANCE STEP

The sturdy AT4 high clearance step is designed to help you and passengers get in and out of your vehicle. Textured surface helps provide increased traction and accessibility, even in wet and muddy conditions. Made to withstand harsh elements and environments.

AVAILABLE AT4 HIGH CLEARANCE STEP

2500 VS 3500

2023 GMC Sierra 2500 AT4 HD in Summit White.

2500 HD AT4

Available maximum conventional trailering capacity of up to 8391 KG (18,500 LB.)^†
Available maximum fifth wheel/gooseneck rating of up to 8391 KG (18,500 LB.)^†
Maximum payload of up to 1637 KG (3608 LB.)^†

BUILD & PRICE
ACCESSORIES

2023 GMC Sierra 3500 AT4 HD in Onyx Black.

3500 HD AT4

Available maximum conventional trailering capacity of up to 9072 KG (20,000 LB.)^†
Available maximum fifth wheel/gooseneck rating of up to 9584 KG (21,130 LB.)^†
Maximum payload of 1903 KG (4196 LB.)^†