AT4

KEY FEATURES:

• Standard 5.3L V8 and Available 6.2L Engine V8 engine with 10-speed automatic transmission
• 13.4" Diagonal Center Touch-Screen, 12.3" Diagonal Digital Driver Information Center and Available Multicolor 15" Diagonal Head-up Display
• 2" Factory Lift with Off-road Suspension and Rancho Monotube Shocks
• Unique Jet-Black Interior with Kalahari Accents and Heated and Ventilated Perforated Front Leather Seating Surfaces³
• Available CarbonPro™ Composite Bed
• 2-Speed AutoTrac Transfer Case, Automatic Locking Rear Differential and Underbody Skid Plates
• Six-Function MultiPro™ Tailgate
• 3 Years OnStar Connect Plan¹⁷  

NEWAT4X

KEY FEATURES:

• 420-Horsepower 6.2L V8 Engine with 10-Speed Automatic Transmission
• Front and Rear E-locking Differentials
• 2" Factory Lift with Off-Road Suspension and Multimatic⁴⁸ DSSV Spool-Valve Dampers 
• Heated and Ventilated 16-Way Power Front Seats with Massage³
• Unique Steel Transfer Case Skid Plate and Available Accessory Rocker Protection
• 12-Speaker Bose¹³ Premium Series with Centerpoint Surround Sound
• 3 Years OnStar Connect Plan¹⁷

6.2L V8 ENGINE
AVAILABLE ON AT4 | AT4X

This available engine has the serious power you need for big jobs or big fun.

• 420 horsepower 
• 624 Nm. of torque
• 6.4 city / 8 highway KML³
• Dynamic Fuel Management
• 10-speed automatic transmission
• Available max tow up to 4,082 Kg³

AT4X OFF-ROAD SUSPENSION
STANDARD ON AT4X

AT4X takes off-road capability to the next level with serious suspension equipment that’s engineered for adventure.

• Multimatic3 DSSV dampers featuring three separate spool valves to control damping and three connected chambers for fluid flow.
• Uniquely tuned springs and increased front and rear suspension travel.
• Specific off-road chassis and tuning.
• Front and rear electronic locking differentials, which assure both wheels will spin together regardless of the amount of resistance to help keep traction in the rough backcountry.

SELECTABLE TRACTION MODES

Switch between available Sport mode, available Off-Road mode and Tow/Haul mode on the fly to take on changing terrain and driving conditions.

This feature allows you to quickly switch between available traction configurations including Sport mode, available Off-Road mode and Tow/Haul mode to optimize powertrain calibrations, traction control settings and stability control system calibrations for a variety of terrain and driving conditions. Available modes include:

• Tour
• Sport
• Terrain
• Tow/Haul
• Off-Road

AT4 OFF-ROAD SUSPENSION
STANDARD ON AT4

AT4 offers powerful capability engineered to take on off-road obstacles and the tough backcountry.

• Factory-installed 2" suspension lift
• Two-speed AutoTrac transfer case, automatic locking rear differential and skid plates.
• Off-road-tuned Rancho monotube shock absorbers

HILL DESCENT CONTROL

Both Sierra AT4 and AT4X come with Hill Descent Control, an antilock braking feature engineered to help provide a smooth, controlled descent on steep declines.

EXCLUSIVE AT4X WHEELS

Rugged 33" Goodyear^® Wrangler Territory mud terrain tires and 18" painted aluminum wheels with dark painted pockets.

33" MT TIRES

Available off-road MT tires help you confidently conquer the backcountry in your AT4 — even in harsh conditions.​

AT4 FRONT BUMPER AND GRILLE

Grille with black chrome header and insert bars with gloss-black accents and red recovery hooks

SPRAY-ON BEDLINER

High-strength steel cargo bed featuring spray-on bedliner with GMC logo.

MULTIPRO TAILGATE
STANDARD ON AT4 | AT4X

Make light work of almost any job with the world’s first available six-function GMC MultiPro Tailgate.

The six-function GMC MultiPro Tailgate helps improve loading, unloading, and accessing the cargo box.

• Open and close the primary gate using the key fob’s power release.
• Load stop to help prevent items from sliding out of the bed.
• Fold-down inner gate for easy access when loading and unloading.
• Inner gate can fold into a full-width step, capable of holding up to 170 Kg.
• Inner gate load stops to help prevent second-tier items from sliding out of the bed.
• Inner gate can be disabled to prevent it from being opened when a hitch or other equipment is installed.
• The opened inner gate provides a work surface as well as second-tier loading.
• Take music outdoors with the available integrated MultiPro Audio System by KICKER^®14

AT4X INTERIOR

Refined Obsidian Rush interior with full-grain leather seats feature red and white double-needle stitching for a premium athletic feel.

AT4X features a luxurious, athletic, and purposeful interior designed to let you explore beyond the boundaries in ultra-premium style and comfort.

• Refined Obsidian Rush interior with full-grain leather seats featuring red and white double-needle stitching and technical-grained leather accents.
• Premium-leather trimmed instrument panel and door panels accented with black-finished Authentic Vanta Ash wood trim.
• Premium microsuede headliner, sun visors and pillars
• 12-speaker Bose¹³ Premium Series with Centerpoint surround sound.
• 16-way power heated and ventilated front driver and passenger seats with massage feature

AT4 INTERIOR

Heated and ventilated front driver and passenger perforated-leather seating surfaces in Jet Black with Kalahari interior and AT4 accents.

• Premium front and rear floor liners with removable carpet inserts
• Heated and ventilated front perforated leather seating surfaces.
• Rear seatback and under-seat storage
• Wrapped heated steering wheel.
• Bose ¹³ Premium Sound System with Richbass woofer

GMC INFOTAINMENT SYSTEM⁴
STANDARD ON AT4 | AT4X

A reconfigurable 13.4" diagonal color touchscreen provides a seamless way to access, manage and customize your favorite in-vehicle entertainment.

• Google built-in¹⁸ compatibility
• Connect your iPhone^® to access hands-free calls and messaging, Apple Music^®, Apple Maps and more with Apple CarPlay^®25 compatibility.
• Connect your compatible smartphone to access Android features such as Google Maps¹² and more with Android Auto™²⁵ compatibility.
• Voice-activated technology for phone
• Customize and manage entertainment and vehicle feature settings

12.3" DIAGONAL DRIVER INFORMATION CENTER

Reconfigure your display by choosing from Classic, Progressive, Digital or Clean configurations.

MYGMC MOBILE APP FOR TRAILERING
AVAILABLE FOR AT4 | AT4X

Create and manage trailer profiles and even share with other compatible Sierra owners using the available myGMC mobile app²⁵

• Trailer Light Sequence Test: Remotely activate trailer lights to ensure they’re in working order.
• Pre-Departure Checklist: Review a pre-departure checklist or create your own.
• Trailer Load Calculator: Find out the combined weight of your truck and trailer.
• Trailering Health: View and receive alerts on key components of your trailer like tire pressure monitoring²⁴ and trailer miles.
• Trailering Glossary: Quick reference to trailering-related materials.

UP TO 14 CAMERA VIEWS

Navigate tight trails and maneuver a trailer with confidence, using up to 14 camera Views³

AVAILABLE CAMERA VIEWS INCLUDE:

• Transparent Trailer View³
• Hitch View
• Bed View with Zoom & Hitch Guidance
• Front Camera View
• Standard Rear Camera View
• Surround View
• Front Top-Down View
• Rear Top-Down View
• Front Side View
• Rear Side View³ with Trailer Biasing
• Rear Trailer View³ with Trailer Angle Indicator
• Inside Trailer View³
• Picture-in-Picture Side View³
• Rear Camera Mirror

HEAD-UP DISPLAY
STANDARD ON AT4X AVAILABLE ON AT4

The multicolor 15" diagonal Head-Up Display projects the following key information directly onto your windshield:

• Speed
• Tachometer
• Mobile Alerts
• Available Navigation³
• Forward Collision Alert³
• Lane Departure Warning³

WIRELESS CAPABILITY

Run the show from behind the wheel by connecting your compatible smartphone to your in-vehicle touchscreen via phone projection.

FRONT & REAR PARK ASSIST
STANDARD ON AT4 | AT4X

The available Front and Rear Park Assist³ feature helps you park with confidence and enhanced visibility.

When attempting to park, the Front and Rear Park Assist³ feature can provide distance alerts to nearby detected objects in front of or behind your pickup to help you park and avoid collisions at low speeds.

GMC PRO SAFETY
STANDARD ON AT4 | AT4X

A suite of collision-avoidance and driver assistance technologies that help enhance your awareness.

GMC Pro Safety³includes:

• Automatic Emergency Braking
• Following Distance Indicator
• Forward Collision Alert
• Front Pedestrian Braking
• IntelliBeam, auto high beams
• Lane Keep Assist with Lane Departure Warning

SIERRA LD AT4

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The Sierra LD AT4 Crew Cab is offered in a 4WD configuration and is equipped with a short bed.

SIERRA LD NEW AT4X

The Sierra LD AT4X Crew Cab is offered in a 4WD configuration and is equipped with a short bed.